xref: /freebsd-12.1/sys/dev/syscons/syscons.c (revision 38ec47c3)
1 /*-
2  * Copyright (c) 1992-1997 S�ren Schmidt
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer
10  *    in this position and unchanged.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software withough specific prior written permission
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  *  $Id: syscons.c,v 1.216 1997/05/15 05:43:57 yokota Exp $
29  */
30 
31 #include "sc.h"
32 #include "apm.h"
33 #include "opt_ddb.h"
34 #include "opt_syscons.h"
35 
36 #if NSC > 0
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/conf.h>
40 #include <sys/proc.h>
41 #include <sys/signalvar.h>
42 #include <sys/tty.h>
43 #include <sys/uio.h>
44 #include <sys/callout.h>
45 #include <sys/kernel.h>
46 #include <sys/syslog.h>
47 #include <sys/errno.h>
48 #include <sys/malloc.h>
49 #ifdef	DEVFS
50 #include <sys/devfsext.h>
51 #endif
52 
53 #include <machine/clock.h>
54 #include <machine/cons.h>
55 #include <machine/console.h>
56 #include <machine/md_var.h>
57 #include <machine/psl.h>
58 #include <machine/frame.h>
59 #include <machine/pc/display.h>
60 #include <machine/apm_bios.h>
61 #include <machine/random.h>
62 
63 #include <vm/vm.h>
64 #include <vm/vm_param.h>
65 #include <vm/pmap.h>
66 
67 #include <i386/isa/isa.h>
68 #include <i386/isa/isa_device.h>
69 #include <i386/isa/timerreg.h>
70 #include <i386/isa/kbdtables.h>
71 #include <i386/isa/kbdio.h>
72 #include <i386/isa/syscons.h>
73 
74 #if !defined(MAXCONS)
75 #define MAXCONS 16
76 #endif
77 
78 #define COLD 0
79 #define WARM 1
80 
81 /* XXX use sc_bcopy where video memory is concerned */
82 #define sc_bcopy generic_bcopy
83 extern void generic_bcopy(const void *, void *, size_t);
84 
85 static default_attr user_default = {
86     (FG_LIGHTGREY | BG_BLACK) << 8,
87     (FG_BLACK | BG_LIGHTGREY) << 8
88 };
89 
90 static default_attr kernel_default = {
91     (FG_WHITE | BG_BLACK) << 8,
92     (FG_BLACK | BG_LIGHTGREY) << 8
93 };
94 
95 static  scr_stat    	main_console;
96 static  scr_stat    	*console[MAXCONS];
97 #ifdef DEVFS
98 static	void		*sc_devfs_token[MAXCONS];
99 #endif
100 	scr_stat    	*cur_console;
101 static  scr_stat    	*new_scp, *old_scp;
102 static  term_stat   	kernel_console;
103 static  default_attr    *current_default;
104 static  int     	flags = 0;
105 static  int		sc_port = IO_KBD;
106 static  KBDC		sc_kbdc = NULL;
107 static  char        	init_done = COLD;
108 static  u_short		sc_buffer[ROW*COL];
109 static  char        	switch_in_progress = FALSE;
110 static  char        	write_in_progress = FALSE;
111 static  char        	blink_in_progress = FALSE;
112 static  int        	blinkrate = 0;
113 	u_int       	crtc_addr = MONO_BASE;
114 	char		crtc_type = KD_MONO;
115 	char        	crtc_vga = FALSE;
116 static  u_char      	shfts = 0, ctls = 0, alts = 0, agrs = 0, metas = 0;
117 static  u_char      	nlkcnt = 0, clkcnt = 0, slkcnt = 0, alkcnt = 0;
118 static  const u_int     n_fkey_tab = sizeof(fkey_tab) / sizeof(*fkey_tab);
119 static  int     	delayed_next_scr = FALSE;
120 static  long        	scrn_blank_time = 0;    /* screen saver timeout value */
121 	int     	scrn_blanked = FALSE;   /* screen saver active flag */
122 static  long       	scrn_time_stamp;
123 	u_char      	scr_map[256];
124 	u_char      	scr_rmap[256];
125 	char        	*video_mode_ptr = NULL;
126 	int     	fonts_loaded = 0;
127 	char        	font_8[256*8];
128 	char		font_14[256*14];
129 	char		font_16[256*16];
130 	char        	palette[256*3];
131 static  char		vgaregs[64];
132 static	char 		*cut_buffer;
133 static  u_short 	mouse_and_mask[16] = {
134 				0xc000, 0xe000, 0xf000, 0xf800,
135 				0xfc00, 0xfe00, 0xff00, 0xff80,
136 				0xfe00, 0x1e00, 0x1f00, 0x0f00,
137 				0x0f00, 0x0000, 0x0000, 0x0000
138 			};
139 static  u_short 	mouse_or_mask[16] = {
140 				0x0000, 0x4000, 0x6000, 0x7000,
141 				0x7800, 0x7c00, 0x7e00, 0x6800,
142 				0x0c00, 0x0c00, 0x0600, 0x0600,
143 				0x0000, 0x0000, 0x0000, 0x0000
144 			};
145 
146 static void    		none_saver(int blank) { }
147 void    		(*current_saver)(int blank) = none_saver;
148 int  			(*sc_user_ioctl)(dev_t dev, int cmd, caddr_t data,
149 					 int flag, struct proc *p) = NULL;
150 
151 /* OS specific stuff */
152 #ifdef not_yet_done
153 #define VIRTUAL_TTY(x)  (sccons[x] = ttymalloc(sccons[x]))
154 struct  CONSOLE_TTY 	(sccons[MAXCONS] = ttymalloc(sccons[MAXCONS]))
155 struct  MOUSE_TTY 	(sccons[MAXCONS+1] = ttymalloc(sccons[MAXCONS+1]))
156 struct  tty         	*sccons[MAXCONS+2];
157 #else
158 #define VIRTUAL_TTY(x)  &sccons[x]
159 #define CONSOLE_TTY 	&sccons[MAXCONS]
160 #define MOUSE_TTY 	&sccons[MAXCONS+1]
161 static struct tty     	sccons[MAXCONS+2];
162 #endif
163 #define SC_MOUSE 	128
164 #define SC_CONSOLE	255
165 #define MONO_BUF    	pa_to_va(0xB0000)
166 #define CGA_BUF     	pa_to_va(0xB8000)
167 u_short         	*Crtat;
168 static const int	nsccons = MAXCONS+2;
169 
170 #define WRAPHIST(scp, pointer, offset)\
171     ((scp->history) + ((((pointer) - (scp->history)) + (scp->history_size)\
172     + (offset)) % (scp->history_size)))
173 #define ISSIGVALID(sig)	((sig) > 0 && (sig) < NSIG)
174 
175 /* this should really be in `rtc.h' */
176 #define RTC_EQUIPMENT		0x14
177 
178 /* prototypes */
179 static int scattach(struct isa_device *dev);
180 static int scparam(struct tty *tp, struct termios *t);
181 static int scprobe(struct isa_device *dev);
182 static int scvidprobe(int unit, int flags);
183 static int sckbdprobe(int unit, int flags);
184 static void scstart(struct tty *tp);
185 static void scmousestart(struct tty *tp);
186 static void scinit(void);
187 static u_int scgetc(u_int flags);
188 #define SCGETC_CN	1
189 #define SCGETC_NONBLOCK	2
190 static scr_stat *get_scr_stat(dev_t dev);
191 static scr_stat *alloc_scp(void);
192 static void init_scp(scr_stat *scp);
193 static int get_scr_num(void);
194 static timeout_t scrn_timer;
195 static void clear_screen(scr_stat *scp);
196 static int switch_scr(scr_stat *scp, u_int next_scr);
197 static void exchange_scr(void);
198 static inline void move_crsr(scr_stat *scp, int x, int y);
199 static void scan_esc(scr_stat *scp, u_char c);
200 static void draw_cursor_image(scr_stat *scp);
201 static void remove_cursor_image(scr_stat *scp);
202 static void ansi_put(scr_stat *scp, u_char *buf, int len);
203 static u_char *get_fstr(u_int c, u_int *len);
204 static void history_to_screen(scr_stat *scp);
205 static int history_up_line(scr_stat *scp);
206 static int history_down_line(scr_stat *scp);
207 static int mask2attr(struct term_stat *term);
208 static void set_keyboard(int command, int data);
209 static void update_leds(int which);
210 static void set_vgaregs(char *modetable);
211 static void read_vgaregs(char *buf);
212 static int comp_vgaregs(u_char *buf1, u_char *buf2);
213 static void dump_vgaregs(u_char *buf);
214 static void set_font_mode(void);
215 static void set_normal_mode(void);
216 static void set_destructive_cursor(scr_stat *scp);
217 static void set_mouse_pos(scr_stat *scp);
218 static void mouse_cut_start(scr_stat *scp);
219 static void mouse_cut_end(scr_stat *scp);
220 static void mouse_paste(scr_stat *scp);
221 static void draw_mouse_image(scr_stat *scp);
222 static void remove_mouse_image(scr_stat *scp);
223 static void draw_cutmarking(scr_stat *scp);
224 static void remove_cutmarking(scr_stat *scp);
225 static void save_palette(void);
226 static void do_bell(scr_stat *scp, int pitch, int duration);
227 static timeout_t blink_screen;
228 #ifdef SC_SPLASH_SCREEN
229 static void toggle_splash_screen(scr_stat *scp);
230 #endif
231 
232 struct  isa_driver scdriver = {
233     scprobe, scattach, "sc", 1
234 };
235 
236 static	d_open_t	scopen;
237 static	d_close_t	scclose;
238 static	d_read_t	scread;
239 static	d_write_t	scwrite;
240 static	d_ioctl_t	scioctl;
241 static	d_devtotty_t	scdevtotty;
242 static	d_mmap_t	scmmap;
243 
244 #define CDEV_MAJOR 12
245 static	struct cdevsw	scdevsw = {
246 	scopen,		scclose,	scread,		scwrite,
247 	scioctl,	nullstop,	noreset,	scdevtotty,
248 	ttselect,	scmmap,		nostrategy,	"sc",	NULL,	-1 };
249 
250 /*
251  * These functions need to be before calls to them so they can be inlined.
252  */
253 static inline void
254 draw_cursor_image(scr_stat *scp)
255 {
256     u_short cursor_image, *ptr = Crtat + (scp->cursor_pos - scp->scr_buf);
257 
258     /* do we have a destructive cursor ? */
259     if (flags & CHAR_CURSOR) {
260 	cursor_image = *scp->cursor_pos;
261 	scp->cursor_saveunder = cursor_image;
262 	/* modify cursor_image */
263 	if (!(flags & BLINK_CURSOR)||((flags & BLINK_CURSOR)&&(blinkrate & 4))){
264 	    set_destructive_cursor(scp);
265 	    cursor_image &= 0xff00;
266 	    cursor_image |= DEAD_CHAR;
267 	}
268     }
269     else {
270 	cursor_image = (*(ptr) & 0x00ff) | *(scp->cursor_pos) & 0xff00;
271 	scp->cursor_saveunder = cursor_image;
272 	if (!(flags & BLINK_CURSOR)||((flags & BLINK_CURSOR)&&(blinkrate & 4))){
273 	    if ((cursor_image & 0x7000) == 0x7000) {
274 		cursor_image &= 0x8fff;
275 		if(!(cursor_image & 0x0700))
276 		    cursor_image |= 0x0700;
277 	    } else {
278 		cursor_image |= 0x7000;
279 		if ((cursor_image & 0x0700) == 0x0700)
280 		    cursor_image &= 0xf0ff;
281 	    }
282 	}
283     }
284     *ptr = cursor_image;
285 }
286 
287 static inline void
288 remove_cursor_image(scr_stat *scp)
289 {
290     *(Crtat + (scp->cursor_oldpos - scp->scr_buf)) = scp->cursor_saveunder;
291 }
292 
293 static inline void
294 move_crsr(scr_stat *scp, int x, int y)
295 {
296     if (x < 0)
297 	x = 0;
298     if (y < 0)
299 	y = 0;
300     if (x >= scp->xsize)
301 	x = scp->xsize-1;
302     if (y >= scp->ysize)
303 	y = scp->ysize-1;
304     scp->xpos = x;
305     scp->ypos = y;
306     scp->cursor_pos = scp->scr_buf + scp->ypos * scp->xsize + scp->xpos;
307 }
308 
309 static int
310 scprobe(struct isa_device *dev)
311 {
312     if (!scvidprobe(dev->id_unit, dev->id_flags)) {
313 	if (bootverbose)
314 	    printf("sc%d: no video adapter is found.\n", dev->id_unit);
315 	return (0);
316     }
317 
318     sc_port = dev->id_iobase;
319     if (sckbdprobe(dev->id_unit, dev->id_flags))
320 	return (IO_KBDSIZE);
321     else
322         return ((dev->id_flags & DETECT_KBD) ? 0 : IO_KBDSIZE);
323 }
324 
325 /* probe video adapters, return TRUE if found */
326 static int
327 scvidprobe(int unit, int flags)
328 {
329     /*
330      * XXX don't try to `printf' anything here, the console may not have
331      * been configured yet.
332      */
333     u_short volatile *cp;
334     u_short was;
335     u_long  pa;
336     u_long  segoff;
337 
338     /* do this test only once */
339     if (init_done != COLD)
340 	return (Crtat != 0);
341 
342     /*
343      * Finish defaulting crtc variables for a mono screen.  Crtat is a
344      * bogus common variable so that it can be shared with pcvt, so it
345      * can't be statically initialized.  XXX.
346      */
347     Crtat = (u_short *)MONO_BUF;
348     crtc_type = KD_MONO;
349     /* If CGA memory seems to work, switch to color.  */
350     cp = (u_short *)CGA_BUF;
351     was = *cp;
352     *cp = (u_short) 0xA55A;
353     if (*cp == 0xA55A) {
354 	Crtat = (u_short *)CGA_BUF;
355 	crtc_addr = COLOR_BASE;
356 	crtc_type = KD_CGA;
357     } else {
358         cp = Crtat;
359 	was = *cp;
360 	*cp = (u_short) 0xA55A;
361 	if (*cp != 0xA55A) {
362 	    /* no screen at all, bail out */
363 	    Crtat = 0;
364 	    return FALSE;
365 	}
366     }
367     *cp = was;
368 
369     /*
370      * Check rtc and BIOS date area.
371      * XXX: don't use BIOSDATA_EQUIPMENT, it is not a dead copy
372      * of RTC_EQUIPMENT. The bit 4 and 5 of the ETC_EQUIPMENT are
373      * zeros for EGA and VGA. However, the EGA/VGA BIOS will set
374      * these bits in BIOSDATA_EQUIPMENT according to the monitor
375      * type detected.
376      */
377     switch ((rtcin(RTC_EQUIPMENT) >> 4) & 3) {	/* bit 4 and 5 */
378     case 0: /* EGA/VGA, or nothing */
379 	crtc_type = KD_EGA;
380 	/* the color adapter may be in the 40x25 mode... XXX */
381 	break;
382     case 1: /* CGA 40x25 */
383 	/* switch to the 80x25 mode? XXX */
384 	/* FALL THROUGH */
385     case 2: /* CGA 80x25 */
386 	/* `crtc_type' has already been set... */
387 	/* crtc_type = KD_CGA; */
388 	break;
389     case 3: /* MDA */
390 	/* `crtc_type' has already been set... */
391 	/* crtc_type = KD_MONO; */
392 	break;
393     }
394 
395     /* is this a VGA or higher ? */
396     outb(crtc_addr, 7);
397     if (inb(crtc_addr) == 7) {
398 
399         crtc_type = KD_VGA;
400 	crtc_vga = TRUE;
401 	read_vgaregs(vgaregs);
402 
403 	/* Get the BIOS video mode pointer */
404 	segoff = *(u_long *)pa_to_va(0x4a8);
405 	pa = (((segoff & 0xffff0000) >> 12) + (segoff & 0xffff));
406 	if (ISMAPPED(pa, sizeof(u_long))) {
407 	    segoff = *(u_long *)pa_to_va(pa);
408 	    pa = (((segoff & 0xffff0000) >> 12) + (segoff & 0xffff));
409 	    if (ISMAPPED(pa, 64))
410 		video_mode_ptr = (char *)pa_to_va(pa);
411 	}
412     }
413 
414     return TRUE;
415 }
416 
417 /* probe the keyboard, return TRUE if found */
418 static int
419 sckbdprobe(int unit, int flags)
420 {
421     int codeset;
422     int c = -1;
423     int m;
424 
425     sc_kbdc = kbdc_open(sc_port);
426 
427     if (!kbdc_lock(sc_kbdc, TRUE)) {
428 	/* driver error? */
429 	printf("sc%d: unable to lock the controller.\n", unit);
430         return ((flags & DETECT_KBD) ? FALSE : TRUE);
431     }
432 
433     /* discard anything left after UserConfig */
434     empty_both_buffers(sc_kbdc, 10);
435 
436     /* save the current keyboard controller command byte */
437     m = kbdc_get_device_mask(sc_kbdc) & ~KBD_KBD_CONTROL_BITS;
438     c = get_controller_command_byte(sc_kbdc);
439     if (c == -1) {
440 	/* CONTROLLER ERROR */
441 	printf("sc%d: unable to get the current command byte value.\n", unit);
442 	goto fail;
443     }
444     if (bootverbose)
445 	printf("sc%d: the current keyboard controller command byte %04x\n",
446 	    unit, c);
447 #if 0
448     /* override the keyboard lock switch */
449     c |= KBD_OVERRIDE_KBD_LOCK;
450 #endif
451 
452     /*
453      * The keyboard may have been screwed up by the boot block.
454      * We may just be able to recover from error by testing the controller
455      * and the keyboard port. The controller command byte needs to be saved
456      * before this recovery operation, as some controllers seem to set
457      * the command byte to particular values.
458      */
459     test_controller(sc_kbdc);
460     test_kbd_port(sc_kbdc);
461 
462     /* enable the keyboard port, but disable the keyboard intr. */
463     if (!set_controller_command_byte(sc_kbdc,
464             KBD_KBD_CONTROL_BITS,
465             KBD_ENABLE_KBD_PORT | KBD_DISABLE_KBD_INT)) {
466 	/* CONTROLLER ERROR
467 	 * there is very little we can do...
468 	 */
469 	printf("sc%d: unable to set the command byte.\n", unit);
470 	goto fail;
471      }
472 
473      /*
474       * Check if we have an XT keyboard before we attempt to reset it.
475       * The procedure assumes that the keyboard and the controller have
476       * been set up properly by BIOS and have not been messed up
477       * during the boot process.
478       */
479      codeset = -1;
480      if (flags & XT_KEYBD)
481 	 /* the user says there is a XT keyboard */
482 	 codeset = 1;
483 #ifdef DETECT_XT_KEYBOARD
484      else if ((c & KBD_TRANSLATION) == 0) {
485 	 /* SET_SCANCODE_SET is not always supported; ignore error */
486 	 if (send_kbd_command_and_data(sc_kbdc, KBDC_SET_SCANCODE_SET, 0)
487 		 == KBD_ACK)
488 	     codeset = read_kbd_data(sc_kbdc);
489      }
490      if (bootverbose)
491          printf("sc%d: keyboard scancode set %d\n", unit, codeset);
492 #endif /* DETECT_XT_KEYBOARD */
493 
494      /* reset keyboard hardware */
495      if (!reset_kbd(sc_kbdc)) {
496         /* KEYBOARD ERROR
497 	 * Keyboard reset may fail either because the keyboard doen't exist,
498          * or because the keyboard doesn't pass the self-test, or the keyboard
499          * controller on the motherboard and the keyboard somehow fail to
500          * shake hands. It is just possible, particularly in the last case,
501          * that the keyoard controller may be left in a hung state.
502          * test_controller() and test_kbd_port() appear to bring the keyboard
503          * controller back (I don't know why and how, though.)
504 	 */
505 	empty_both_buffers(sc_kbdc, 10);
506 	test_controller(sc_kbdc);
507 	test_kbd_port(sc_kbdc);
508 	/* We could disable the keyboard port and interrupt... but,
509 	 * the keyboard may still exist (see above).
510 	 */
511         if (bootverbose)
512 	   printf("sc%d: failed to reset the keyboard.\n", unit);
513 	goto fail;
514     }
515 
516     /*
517      * Allow us to set the XT_KEYBD flag in UserConfig so that keyboards
518      * such as those on the IBM ThinkPad laptop computers can be used
519      * with the standard console driver.
520      */
521     if (codeset == 1) {
522 	if (send_kbd_command_and_data(
523 	        sc_kbdc, KBDC_SET_SCANCODE_SET, codeset) == KBD_ACK) {
524 	    /* XT kbd doesn't need scan code translation */
525 	    c &= ~KBD_TRANSLATION;
526 	} else {
527 	    /* KEYBOARD ERROR
528 	     * The XT kbd isn't usable unless the proper scan code set
529 	     * is selected.
530 	     */
531 	    printf("sc%d: unable to set the XT keyboard mode.\n", unit);
532 	    goto fail;
533 	}
534     }
535     /* enable the keyboard port and intr. */
536     if (!set_controller_command_byte(sc_kbdc,
537             KBD_KBD_CONTROL_BITS | KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK,
538 	    (c & (KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK))
539 	        | KBD_ENABLE_KBD_PORT | KBD_ENABLE_KBD_INT)) {
540 	/* CONTROLLER ERROR
541 	 * This is serious; we are left with the disabled keyboard intr.
542 	 */
543 	printf("sc%d: unable to enable the keyboard port and intr.\n", unit);
544 	goto fail;
545     }
546 
547 succeed:
548     kbdc_set_device_mask(sc_kbdc, m | KBD_KBD_CONTROL_BITS),
549     kbdc_lock(sc_kbdc, FALSE);
550     return TRUE;
551 
552 fail:
553     if (c != -1)
554         /* try to restore the command byte as before, if possible */
555         set_controller_command_byte(sc_kbdc, 0xff, c);
556     kbdc_set_device_mask(sc_kbdc,
557         (flags & DETECT_KBD) ? m : m | KBD_KBD_CONTROL_BITS);
558     kbdc_lock(sc_kbdc, FALSE);
559     return FALSE;
560 }
561 
562 #if NAPM > 0
563 static int
564 scresume(void *dummy)
565 {
566 	shfts = ctls = alts = agrs = metas = 0;
567 	return 0;
568 }
569 #endif
570 
571 static int
572 scattach(struct isa_device *dev)
573 {
574     scr_stat *scp;
575     dev_t cdev = makedev(CDEV_MAJOR, 0);
576 #ifdef DEVFS
577     int vc;
578 #endif
579 
580     scinit();
581     flags = dev->id_flags;
582 
583     scp = console[0];
584 
585     if (crtc_vga) {
586     	cut_buffer = (char *)malloc(scp->xsize*scp->ysize, M_DEVBUF, M_NOWAIT);
587     }
588 
589     scp->scr_buf = (u_short *)malloc(scp->xsize*scp->ysize*sizeof(u_short),
590 				     M_DEVBUF, M_NOWAIT);
591 
592     /* copy temporary buffer to final buffer */
593     bcopy(sc_buffer, scp->scr_buf, scp->xsize * scp->ysize * sizeof(u_short));
594 
595     scp->cursor_pos = scp->cursor_oldpos =
596 	scp->scr_buf + scp->xpos + scp->ypos * scp->xsize;
597     scp->mouse_pos = scp->mouse_oldpos =
598 	scp->scr_buf + ((scp->mouse_ypos/scp->font_size)*scp->xsize +
599 	    		scp->mouse_xpos/8);
600 
601     /* initialize history buffer & pointers */
602     scp->history_head = scp->history_pos = scp->history =
603 	(u_short *)malloc(scp->history_size*sizeof(u_short),
604 			  M_DEVBUF, M_NOWAIT);
605     bzero(scp->history_head, scp->history_size*sizeof(u_short));
606 
607     /* initialize cursor stuff */
608     if (!(scp->status & UNKNOWN_MODE)) {
609     	draw_cursor_image(scp);
610     	if (crtc_vga && (flags & CHAR_CURSOR))
611 	    set_destructive_cursor(scp);
612     }
613 
614     /* get screen update going */
615     scrn_timer(NULL);
616 
617     update_leds(scp->status);
618 
619     if (bootverbose) {
620         printf("sc%d: BIOS video mode:%d\n",
621 	    dev->id_unit, *(u_char *)pa_to_va(0x449));
622         printf("sc%d: VGA registers upon power-up\n", dev->id_unit);
623         dump_vgaregs(vgaregs);
624         printf("sc%d: video mode:%d\n", dev->id_unit, scp->mode);
625         if (video_mode_ptr != NULL) {
626             printf("sc%d: VGA registers for mode:%d\n",
627 		dev->id_unit, scp->mode);
628             dump_vgaregs(video_mode_ptr + (64*scp->mode));
629         }
630     }
631 
632     printf("sc%d: ", dev->id_unit);
633     switch(crtc_type) {
634     case KD_VGA:
635 	if (crtc_addr == MONO_BASE)
636 	    printf("VGA mono");
637 	else
638 	    printf("VGA color");
639 	break;
640     case KD_EGA:
641 	if (crtc_addr == MONO_BASE)
642 	    printf("EGA mono");
643 	else
644 	    printf("EGA color");
645 	break;
646     case KD_CGA:
647 	printf("CGA");
648 	break;
649     case KD_MONO:
650     case KD_HERCULES:
651     default:
652 	printf("MDA/hercules");
653 	break;
654     }
655     printf(" <%d virtual consoles, flags=0x%x>\n", MAXCONS, flags);
656 
657 #if NAPM > 0
658     scp->r_hook.ah_fun = scresume;
659     scp->r_hook.ah_arg = NULL;
660     scp->r_hook.ah_name = "system keyboard";
661     scp->r_hook.ah_order = APM_MID_ORDER;
662     apm_hook_establish(APM_HOOK_RESUME , &scp->r_hook);
663 #endif
664 
665     cdevsw_add(&cdev, &scdevsw, NULL);
666 
667 #ifdef DEVFS
668     for (vc = 0; vc < MAXCONS; vc++)
669         sc_devfs_token[vc] = devfs_add_devswf(&scdevsw, vc, DV_CHR, UID_ROOT,
670 					      GID_WHEEL, 0600, "ttyv%n", vc);
671 #endif
672     return 0;
673 }
674 
675 struct tty
676 *scdevtotty(dev_t dev)
677 {
678     int unit = minor(dev);
679 
680     if (init_done == COLD)
681 	return(NULL);
682     if (unit == SC_CONSOLE)
683 	return CONSOLE_TTY;
684     if (unit == SC_MOUSE)
685 	return MOUSE_TTY;
686     if (unit >= MAXCONS || unit < 0)
687 	return(NULL);
688     return VIRTUAL_TTY(unit);
689 }
690 
691 int
692 scopen(dev_t dev, int flag, int mode, struct proc *p)
693 {
694     struct tty *tp = scdevtotty(dev);
695 
696     if (!tp)
697 	return(ENXIO);
698 
699     tp->t_oproc = (minor(dev) == SC_MOUSE) ? scmousestart : scstart;
700     tp->t_param = scparam;
701     tp->t_dev = dev;
702     if (!(tp->t_state & TS_ISOPEN)) {
703 	ttychars(tp);
704         /* Use the current setting of the <-- key as default VERASE. */
705         /* If the Delete key is preferable, an stty is necessary     */
706         tp->t_cc[VERASE] = key_map.key[0x0e].map[0];
707 	tp->t_iflag = TTYDEF_IFLAG;
708 	tp->t_oflag = TTYDEF_OFLAG;
709 	tp->t_cflag = TTYDEF_CFLAG;
710 	tp->t_lflag = TTYDEF_LFLAG;
711 	tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
712 	scparam(tp, &tp->t_termios);
713 	ttsetwater(tp);
714 	(*linesw[tp->t_line].l_modem)(tp, 1);
715     }
716     else
717 	if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
718 	    return(EBUSY);
719     if (minor(dev) < MAXCONS && !console[minor(dev)]) {
720 	console[minor(dev)] = alloc_scp();
721     }
722     if (minor(dev)<MAXCONS && !tp->t_winsize.ws_col && !tp->t_winsize.ws_row) {
723 	tp->t_winsize.ws_col = console[minor(dev)]->xsize;
724 	tp->t_winsize.ws_row = console[minor(dev)]->ysize;
725     }
726     return ((*linesw[tp->t_line].l_open)(dev, tp));
727 }
728 
729 int
730 scclose(dev_t dev, int flag, int mode, struct proc *p)
731 {
732     struct tty *tp = scdevtotty(dev);
733     struct scr_stat *scp;
734 
735     if (!tp)
736 	return(ENXIO);
737     if (minor(dev) < MAXCONS) {
738 	scp = get_scr_stat(tp->t_dev);
739 	if (scp->status & SWITCH_WAIT_ACQ)
740 	    wakeup((caddr_t)&scp->smode);
741 #if not_yet_done
742 	if (scp == &main_console) {
743 	    scp->pid = 0;
744 	    scp->proc = NULL;
745 	    scp->smode.mode = VT_AUTO;
746 	}
747 	else {
748 	    free(scp->scr_buf, M_DEVBUF);
749 	    free(scp->history, M_DEVBUF);
750 	    free(scp, M_DEVBUF);
751 	    console[minor(dev)] = NULL;
752 	}
753 #else
754 	scp->pid = 0;
755 	scp->proc = NULL;
756 	scp->smode.mode = VT_AUTO;
757 #endif
758     }
759     spltty();
760     (*linesw[tp->t_line].l_close)(tp, flag);
761     ttyclose(tp);
762     spl0();
763     return(0);
764 }
765 
766 int
767 scread(dev_t dev, struct uio *uio, int flag)
768 {
769     struct tty *tp = scdevtotty(dev);
770 
771     if (!tp)
772 	return(ENXIO);
773     return((*linesw[tp->t_line].l_read)(tp, uio, flag));
774 }
775 
776 int
777 scwrite(dev_t dev, struct uio *uio, int flag)
778 {
779     struct tty *tp = scdevtotty(dev);
780 
781     if (!tp)
782 	return(ENXIO);
783     return((*linesw[tp->t_line].l_write)(tp, uio, flag));
784 }
785 
786 void
787 scintr(int unit)
788 {
789     static struct tty *cur_tty;
790     int c, len;
791     u_char *cp;
792 
793     /* make screensaver happy */
794     scrn_time_stamp = time.tv_sec;
795     if (scrn_blanked) {
796 	(*current_saver)(FALSE);
797 	mark_all(cur_console);
798     }
799 
800     /*
801      * Loop while there is still input to get from the keyboard.
802      * I don't think this is nessesary, and it doesn't fix
803      * the Xaccel-2.1 keyboard hang, but it can't hurt.		XXX
804      */
805     while ((c = scgetc(SCGETC_NONBLOCK)) != NOKEY) {
806 
807 	cur_tty = VIRTUAL_TTY(get_scr_num());
808 	if (!(cur_tty->t_state & TS_ISOPEN))
809 	    if (!((cur_tty = CONSOLE_TTY)->t_state & TS_ISOPEN))
810 		continue;
811 
812 	switch (c & 0xff00) {
813 	case 0x0000: /* normal key */
814 	    (*linesw[cur_tty->t_line].l_rint)(c & 0xFF, cur_tty);
815 	    break;
816 	case FKEY:  /* function key, return string */
817 	    if (cp = get_fstr((u_int)c, (u_int *)&len)) {
818 	    	while (len-- >  0)
819 		    (*linesw[cur_tty->t_line].l_rint)(*cp++ & 0xFF, cur_tty);
820 	    }
821 	    break;
822 	case MKEY:  /* meta is active, prepend ESC */
823 	    (*linesw[cur_tty->t_line].l_rint)(0x1b, cur_tty);
824 	    (*linesw[cur_tty->t_line].l_rint)(c & 0xFF, cur_tty);
825 	    break;
826 	case BKEY:  /* backtab fixed sequence (esc [ Z) */
827 	    (*linesw[cur_tty->t_line].l_rint)(0x1b, cur_tty);
828 	    (*linesw[cur_tty->t_line].l_rint)('[', cur_tty);
829 	    (*linesw[cur_tty->t_line].l_rint)('Z', cur_tty);
830 	    break;
831 	}
832     }
833 
834     if (cur_console->status & MOUSE_ENABLED) {
835 	cur_console->status &= ~MOUSE_VISIBLE;
836 	remove_mouse_image(cur_console);
837     }
838 }
839 
840 static int
841 scparam(struct tty *tp, struct termios *t)
842 {
843     tp->t_ispeed = t->c_ispeed;
844     tp->t_ospeed = t->c_ospeed;
845     tp->t_cflag = t->c_cflag;
846     return 0;
847 }
848 
849 int
850 scioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
851 {
852     int error;
853     u_int i;
854     struct tty *tp;
855     scr_stat *scp;
856 
857     tp = scdevtotty(dev);
858     if (!tp)
859 	return ENXIO;
860     scp = get_scr_stat(tp->t_dev);
861 
862     /* If there is a user_ioctl function call that first */
863     if (sc_user_ioctl) {
864 	if (error = (*sc_user_ioctl)(dev, cmd, data, flag, p))
865 	    return error;
866     }
867 
868     switch (cmd) {  		/* process console hardware related ioctl's */
869 
870     case GIO_ATTR:      	/* get current attributes */
871 	*(int*)data = (scp->term.cur_attr >> 8) & 0xFF;
872 	return 0;
873 
874     case GIO_COLOR:     	/* is this a color console ? */
875 	if (crtc_addr == COLOR_BASE)
876 	    *(int*)data = 1;
877 	else
878 	    *(int*)data = 0;
879 	return 0;
880 
881     case CONS_CURRENT:  	/* get current adapter type */
882 	*(int *)data = crtc_type;
883 	return 0;
884 
885     case CONS_GET:      	/* get current video mode */
886 	*(int*)data = scp->mode;
887 	return 0;
888 
889     case CONS_BLANKTIME:    	/* set screen saver timeout (0 = no saver) */
890 	if (*(int *)data < 0)
891             return EINVAL;
892 	scrn_blank_time = *(int*)data;
893 	if ((scrn_blank_time == 0) && scrn_blanked) {
894 	    (*current_saver)(FALSE);
895 	    mark_all(cur_console);
896 	}
897 	return 0;
898 
899     case CONS_CURSORTYPE:   	/* set cursor type blink/noblink */
900 	if ((*(int*)data) & 0x01)
901 	    flags |= BLINK_CURSOR;
902 	else
903 	    flags &= ~BLINK_CURSOR;
904 	if ((*(int*)data) & 0x02) {
905 	    if (!crtc_vga)
906 		return ENXIO;
907 	    flags |= CHAR_CURSOR;
908 	    set_destructive_cursor(scp);
909 	} else
910 	    flags &= ~CHAR_CURSOR;
911 	return 0;
912 
913     case CONS_BELLTYPE: 	/* set bell type sound/visual */
914 	if (*data)
915 	    flags |= VISUAL_BELL;
916 	else
917 	    flags &= ~VISUAL_BELL;
918 	return 0;
919 
920     case CONS_HISTORY:  	/* set history size */
921 	if (*data) {
922 	    free(scp->history, M_DEVBUF);
923 	    scp->history_size = *(int*)data;
924 	    if (scp->history_size < scp->ysize)
925 		scp->history = NULL;
926 	    else {
927 		scp->history_size *= scp->xsize;
928 		scp->history_head = scp->history_pos = scp->history =
929 		    (u_short *)malloc(scp->history_size*sizeof(u_short),
930 				      M_DEVBUF, M_WAITOK);
931 		bzero(scp->history_head, scp->history_size*sizeof(u_short));
932 	    }
933 	    return 0;
934 	}
935 	else
936 	    return EINVAL;
937 
938     case CONS_MOUSECTL:		/* control mouse arrow */
939     {
940 	mouse_info_t *mouse = (mouse_info_t*)data;
941 
942 	if (!crtc_vga)
943 	    return ENXIO;
944 
945 	switch (mouse->operation) {
946 	case MOUSE_MODE:
947 	    if (ISSIGVALID(mouse->u.mode.signal)) {
948 		scp->mouse_signal = mouse->u.mode.signal;
949 		scp->mouse_proc = p;
950 		scp->mouse_pid = p->p_pid;
951 	    }
952 	    else {
953 		scp->mouse_signal = 0;
954 		scp->mouse_proc = NULL;
955 		scp->mouse_pid = 0;
956 	    }
957 	    break;
958 
959 	case MOUSE_SHOW:
960 	    if (!(scp->status & MOUSE_ENABLED)) {
961 		scp->status |= (MOUSE_ENABLED | MOUSE_VISIBLE);
962 		scp->mouse_oldpos = scp->mouse_pos;
963 		mark_all(scp);
964 	    }
965 	    else
966 		return EINVAL;
967 	    break;
968 
969 	case MOUSE_HIDE:
970 	    if (scp->status & MOUSE_ENABLED) {
971 		scp->status &= ~(MOUSE_ENABLED | MOUSE_VISIBLE);
972 		mark_all(scp);
973 	    }
974 	    else
975 		return EINVAL;
976 	    break;
977 
978 	case MOUSE_MOVEABS:
979 	    scp->mouse_xpos = mouse->u.data.x;
980 	    scp->mouse_ypos = mouse->u.data.y;
981 	    set_mouse_pos(scp);
982 	    break;
983 
984 	case MOUSE_MOVEREL:
985 	    scp->mouse_xpos += mouse->u.data.x;
986 	    scp->mouse_ypos += mouse->u.data.y;
987 	    set_mouse_pos(scp);
988 	    break;
989 
990 	case MOUSE_GETINFO:
991 	    mouse->u.data.x = scp->mouse_xpos;
992 	    mouse->u.data.y = scp->mouse_ypos;
993 	    mouse->u.data.buttons = scp->mouse_buttons;
994 	    break;
995 
996 	case MOUSE_ACTION:
997 	    /* this should maybe only be settable from /dev/consolectl SOS */
998 	    /* send out mouse event on /dev/sysmouse */
999 	    if (cur_console->status & MOUSE_ENABLED)
1000 	    	cur_console->status |= MOUSE_VISIBLE;
1001 	    if ((MOUSE_TTY)->t_state & TS_ISOPEN) {
1002 		u_char buf[5];
1003 		int i;
1004 
1005 		buf[0] = 0x80 | ((~mouse->u.data.buttons) & 0x07);
1006 		buf[1] = (mouse->u.data.x & 0x1fe >> 1);
1007 		buf[3] = (mouse->u.data.x & 0x1ff) - buf[1];
1008 		buf[2] = -(mouse->u.data.y & 0x1fe >> 1);
1009 		buf[4] = -(mouse->u.data.y & 0x1ff) - buf[2];
1010 		for (i=0; i<5; i++)
1011 	    		(*linesw[(MOUSE_TTY)->t_line].l_rint)(buf[i],MOUSE_TTY);
1012 	    }
1013 	    cur_console->mouse_xpos += mouse->u.data.x;
1014 	    cur_console->mouse_ypos += mouse->u.data.y;
1015 	    if (cur_console->mouse_signal) {
1016 		cur_console->mouse_buttons = mouse->u.data.buttons;
1017     		/* has controlling process died? */
1018 		if (cur_console->mouse_proc &&
1019 		    (cur_console->mouse_proc != pfind(cur_console->mouse_pid))){
1020 		    	cur_console->mouse_signal = 0;
1021 			cur_console->mouse_proc = NULL;
1022 			cur_console->mouse_pid = 0;
1023 		}
1024 		else
1025 		    psignal(cur_console->mouse_proc, cur_console->mouse_signal);
1026 	    }
1027 	    else {
1028 		/* process button presses */
1029 		if (cur_console->mouse_buttons != mouse->u.data.buttons) {
1030 		    cur_console->mouse_buttons = mouse->u.data.buttons;
1031 		    if (!(cur_console->status & UNKNOWN_MODE)) {
1032 			if (cur_console->mouse_buttons & LEFT_BUTTON)
1033 			    mouse_cut_start(cur_console);
1034 			else
1035 			    mouse_cut_end(cur_console);
1036 			if (cur_console->mouse_buttons & RIGHT_BUTTON ||
1037 			    cur_console->mouse_buttons & MIDDLE_BUTTON)
1038 			    mouse_paste(cur_console);
1039 		    }
1040 		}
1041 	    }
1042 	    if (mouse->u.data.x != 0 || mouse->u.data.y != 0)
1043 		set_mouse_pos(cur_console);
1044 	    break;
1045 
1046 	default:
1047 	    return EINVAL;
1048 	}
1049 	/* make screensaver happy */
1050 	scrn_time_stamp = time.tv_sec;
1051 	if (scrn_blanked) {
1052 	    (*current_saver)(FALSE);
1053 	    mark_all(cur_console);
1054 	}
1055 	return 0;
1056     }
1057 
1058     case CONS_GETINFO:  	/* get current (virtual) console info */
1059     {
1060 	vid_info_t *ptr = (vid_info_t*)data;
1061 	if (ptr->size == sizeof(struct vid_info)) {
1062 	    ptr->m_num = get_scr_num();
1063 	    ptr->mv_col = scp->xpos;
1064 	    ptr->mv_row = scp->ypos;
1065 	    ptr->mv_csz = scp->xsize;
1066 	    ptr->mv_rsz = scp->ysize;
1067 	    ptr->mv_norm.fore = (scp->term.std_color & 0x0f00)>>8;
1068 	    ptr->mv_norm.back = (scp->term.std_color & 0xf000)>>12;
1069 	    ptr->mv_rev.fore = (scp->term.rev_color & 0x0f00)>>8;
1070 	    ptr->mv_rev.back = (scp->term.rev_color & 0xf000)>>12;
1071 	    ptr->mv_grfc.fore = 0;      /* not supported */
1072 	    ptr->mv_grfc.back = 0;      /* not supported */
1073 	    ptr->mv_ovscan = scp->border;
1074 	    ptr->mk_keylock = scp->status & LOCK_KEY_MASK;
1075 	    return 0;
1076 	}
1077 	return EINVAL;
1078     }
1079 
1080     case CONS_GETVERS:  	/* get version number */
1081 	*(int*)data = 0x200;    /* version 2.0 */
1082 	return 0;
1083 
1084     /* VGA TEXT MODES */
1085     case SW_VGA_C40x25:
1086     case SW_VGA_C80x25: case SW_VGA_M80x25:
1087     case SW_VGA_C80x30: case SW_VGA_M80x30:
1088     case SW_VGA_C80x50: case SW_VGA_M80x50:
1089     case SW_VGA_C80x60: case SW_VGA_M80x60:
1090     case SW_B40x25:     case SW_C40x25:
1091     case SW_B80x25:     case SW_C80x25:
1092     case SW_ENH_B40x25: case SW_ENH_C40x25:
1093     case SW_ENH_B80x25: case SW_ENH_C80x25:
1094     case SW_ENH_B80x43: case SW_ENH_C80x43:
1095     case SW_EGAMONO80x25:
1096 
1097 	if (!crtc_vga || video_mode_ptr == NULL)
1098 	    return ENXIO;
1099 	switch (cmd & 0xff) {
1100 	case M_VGA_C80x60: case M_VGA_M80x60:
1101 	    if (!(fonts_loaded & FONT_8))
1102 		return EINVAL;
1103 	    scp->xsize = 80;
1104 	    scp->ysize = 60;
1105 	    break;
1106 	case M_VGA_C80x50: case M_VGA_M80x50:
1107 	    if (!(fonts_loaded & FONT_8))
1108 		return EINVAL;
1109 	    scp->xsize = 80;
1110 	    scp->ysize = 50;
1111 	    break;
1112 	case M_ENH_B80x43: case M_ENH_C80x43:
1113 	    if (!(fonts_loaded & FONT_8))
1114 		return EINVAL;
1115 	    scp->xsize = 80;
1116 	    scp->ysize = 43;
1117 	    break;
1118 	case M_VGA_C80x30: case M_VGA_M80x30:
1119 	    scp->xsize = 80;
1120 	    scp->ysize = 30;
1121 	    break;
1122 	case M_ENH_C40x25: case M_ENH_B40x25:
1123 	case M_ENH_C80x25: case M_ENH_B80x25:
1124 	case M_EGAMONO80x25:
1125 	    if (!(fonts_loaded & FONT_14))
1126 		return EINVAL;
1127 	    /* FALL THROUGH */
1128 	default:
1129 	    if ((cmd & 0xff) > M_VGA_CG320)
1130 		return EINVAL;
1131 	    else
1132 		scp->xsize = *(video_mode_ptr+((cmd&0xff)*64));
1133 		scp->ysize = *(video_mode_ptr+((cmd&0xff)*64)+1)+1;
1134 	    break;
1135 	}
1136 	scp->mode = cmd & 0xff;
1137 	free(scp->scr_buf, M_DEVBUF);
1138 	scp->scr_buf = (u_short *)
1139 	    malloc(scp->xsize*scp->ysize*sizeof(u_short), M_DEVBUF, M_WAITOK);
1140     	scp->cursor_pos = scp->cursor_oldpos =
1141 	    scp->scr_buf + scp->xpos + scp->ypos * scp->xsize;
1142     	scp->mouse_pos = scp->mouse_oldpos =
1143 	    scp->scr_buf + ((scp->mouse_ypos/scp->font_size)*scp->xsize +
1144 	    scp->mouse_xpos/8);
1145 	free(cut_buffer, M_DEVBUF);
1146     	cut_buffer = (char *)malloc(scp->xsize*scp->ysize, M_DEVBUF, M_NOWAIT);
1147 	cut_buffer[0] = 0x00;
1148 	if (scp == cur_console)
1149 	    set_mode(scp);
1150 	scp->status &= ~UNKNOWN_MODE;
1151 	clear_screen(scp);
1152 	if (tp->t_winsize.ws_col != scp->xsize
1153 	    || tp->t_winsize.ws_row != scp->ysize) {
1154 	    tp->t_winsize.ws_col = scp->xsize;
1155 	    tp->t_winsize.ws_row = scp->ysize;
1156 	    pgsignal(tp->t_pgrp, SIGWINCH, 1);
1157 	}
1158 	return 0;
1159 
1160     /* GRAPHICS MODES */
1161     case SW_BG320:     case SW_BG640:
1162     case SW_CG320:     case SW_CG320_D:   case SW_CG640_E:
1163     case SW_CG640x350: case SW_ENH_CG640:
1164     case SW_BG640x480: case SW_CG640x480: case SW_VGA_CG320:
1165 
1166 	if (!crtc_vga || video_mode_ptr == NULL)
1167 	    return ENXIO;
1168 	scp->mode = cmd & 0xFF;
1169 	scp->xpixel = (*(video_mode_ptr + (scp->mode*64))) * 8;
1170 	scp->ypixel = (*(video_mode_ptr + (scp->mode*64) + 1) + 1) *
1171 		     (*(video_mode_ptr + (scp->mode*64) + 2));
1172 	if (scp == cur_console)
1173 	    set_mode(scp);
1174 	scp->status |= UNKNOWN_MODE;    /* graphics mode */
1175 	/* clear_graphics();*/
1176 
1177 	if (tp->t_winsize.ws_xpixel != scp->xpixel
1178 	    || tp->t_winsize.ws_ypixel != scp->ypixel) {
1179 	    tp->t_winsize.ws_xpixel = scp->xpixel;
1180 	    tp->t_winsize.ws_ypixel = scp->ypixel;
1181 	    pgsignal(tp->t_pgrp, SIGWINCH, 1);
1182 	}
1183 	return 0;
1184 
1185     case VT_SETMODE:    	/* set screen switcher mode */
1186     {
1187 	struct vt_mode *mode;
1188 
1189 	mode = (struct vt_mode *)data;
1190 	if (ISSIGVALID(mode->relsig) && ISSIGVALID(mode->acqsig) &&
1191 	    ISSIGVALID(mode->frsig)) {
1192 	    bcopy(data, &scp->smode, sizeof(struct vt_mode));
1193 	    if (scp->smode.mode == VT_PROCESS) {
1194 		scp->proc = p;
1195 		scp->pid = scp->proc->p_pid;
1196 	    }
1197 	    return 0;
1198 	} else
1199 	    return EINVAL;
1200     }
1201 
1202     case VT_GETMODE:    	/* get screen switcher mode */
1203 	bcopy(&scp->smode, data, sizeof(struct vt_mode));
1204 	return 0;
1205 
1206     case VT_RELDISP:    	/* screen switcher ioctl */
1207 	switch(*data) {
1208 	case VT_FALSE:  	/* user refuses to release screen, abort */
1209 	    if (scp == old_scp && (scp->status & SWITCH_WAIT_REL)) {
1210 		old_scp->status &= ~SWITCH_WAIT_REL;
1211 		switch_in_progress = FALSE;
1212 		return 0;
1213 	    }
1214 	    return EINVAL;
1215 
1216 	case VT_TRUE:   	/* user has released screen, go on */
1217 	    if (scp == old_scp && (scp->status & SWITCH_WAIT_REL)) {
1218 		scp->status &= ~SWITCH_WAIT_REL;
1219 		exchange_scr();
1220 		if (new_scp->smode.mode == VT_PROCESS) {
1221 		    new_scp->status |= SWITCH_WAIT_ACQ;
1222 		    psignal(new_scp->proc, new_scp->smode.acqsig);
1223 		}
1224 		else
1225 		    switch_in_progress = FALSE;
1226 		return 0;
1227 	    }
1228 	    return EINVAL;
1229 
1230 	case VT_ACKACQ: 	/* acquire acknowledged, switch completed */
1231 	    if (scp == new_scp && (scp->status & SWITCH_WAIT_ACQ)) {
1232 		scp->status &= ~SWITCH_WAIT_ACQ;
1233 		switch_in_progress = FALSE;
1234 		return 0;
1235 	    }
1236 	    return EINVAL;
1237 
1238 	default:
1239 	    return EINVAL;
1240 	}
1241 	/* NOT REACHED */
1242 
1243     case VT_OPENQRY:    	/* return free virtual console */
1244 	for (i = 0; i < MAXCONS; i++) {
1245 	    tp = VIRTUAL_TTY(i);
1246 	    if (!(tp->t_state & TS_ISOPEN)) {
1247 		*data = i + 1;
1248 		return 0;
1249 	    }
1250 	}
1251 	return EINVAL;
1252 
1253     case VT_ACTIVATE:   	/* switch to screen *data */
1254 	return switch_scr(scp, (*data) - 1);
1255 
1256     case VT_WAITACTIVE: 	/* wait for switch to occur */
1257 	if (*data > MAXCONS || *data < 0)
1258 	    return EINVAL;
1259 	if (minor(dev) == (*data) - 1)
1260 	    return 0;
1261 	if (*data == 0) {
1262 	    if (scp == cur_console)
1263 		return 0;
1264 	}
1265 	else
1266 	    scp = console[(*data) - 1];
1267 	while ((error=tsleep((caddr_t)&scp->smode, PZERO|PCATCH,
1268 			     "waitvt", 0)) == ERESTART) ;
1269 	return error;
1270 
1271     case VT_GETACTIVE:
1272 	*data = get_scr_num()+1;
1273 	return 0;
1274 
1275     case KDENABIO:      	/* allow io operations */
1276 	error = suser(p->p_ucred, &p->p_acflag);
1277 	if (error != 0)
1278 	    return error;
1279 	if (securelevel > 0)
1280 	    return EPERM;
1281 	p->p_md.md_regs->tf_eflags |= PSL_IOPL;
1282 	return 0;
1283 
1284     case KDDISABIO:     	/* disallow io operations (default) */
1285 	p->p_md.md_regs->tf_eflags &= ~PSL_IOPL;
1286 	return 0;
1287 
1288     case KDSETMODE:     	/* set current mode of this (virtual) console */
1289 	switch (*data) {
1290 	case KD_TEXT:   	/* switch to TEXT (known) mode */
1291 	    /* restore fonts & palette ! */
1292 	    if (crtc_vga) {
1293 		if (fonts_loaded & FONT_8)
1294 		    copy_font(LOAD, FONT_8, font_8);
1295 		if (fonts_loaded & FONT_14)
1296 		    copy_font(LOAD, FONT_14, font_14);
1297 		if (fonts_loaded & FONT_16)
1298 		    copy_font(LOAD, FONT_16, font_16);
1299 		if (flags & CHAR_CURSOR)
1300 		    set_destructive_cursor(scp);
1301 		load_palette(palette);
1302 	    }
1303 	    /* FALL THROUGH */
1304 
1305 	case KD_TEXT1:  	/* switch to TEXT (known) mode */
1306 	    /* no restore fonts & palette */
1307 	    if (crtc_vga && video_mode_ptr)
1308 		set_mode(scp);
1309 	    scp->status &= ~UNKNOWN_MODE;
1310 	    clear_screen(scp);
1311 	    return 0;
1312 
1313 	case KD_GRAPHICS:	/* switch to GRAPHICS (unknown) mode */
1314 	    scp->status |= UNKNOWN_MODE;
1315 	    return 0;
1316 	default:
1317 	    return EINVAL;
1318 	}
1319 	/* NOT REACHED */
1320 
1321     case KDGETMODE:     	/* get current mode of this (virtual) console */
1322 	*data = (scp->status & UNKNOWN_MODE) ? KD_GRAPHICS : KD_TEXT;
1323 	return 0;
1324 
1325     case KDSBORDER:     	/* set border color of this (virtual) console */
1326 	if (!crtc_vga)
1327 	    return ENXIO;
1328 	scp->border = *data;
1329 	if (scp == cur_console)
1330 	    set_border(scp->border);
1331 	return 0;
1332 
1333     case KDSKBSTATE:    	/* set keyboard state (locks) */
1334 	if (*data >= 0 && *data <= LOCK_KEY_MASK) {
1335 	    scp->status &= ~LOCK_KEY_MASK;
1336 	    scp->status |= *data;
1337 	    if (scp == cur_console)
1338 		update_leds(scp->status);
1339 	    return 0;
1340 	}
1341 	return EINVAL;
1342 
1343     case KDGKBSTATE:    	/* get keyboard state (locks) */
1344 	*data = scp->status & LOCK_KEY_MASK;
1345 	return 0;
1346 
1347     case KDSETRAD:      	/* set keyboard repeat & delay rates */
1348 	if (*data & 0x80)
1349 	    return EINVAL;
1350 	if (sc_kbdc != NULL)
1351 	    set_keyboard(KBDC_SET_TYPEMATIC, *data);
1352 	return 0;
1353 
1354     case KDSKBMODE:     	/* set keyboard mode */
1355 	switch (*data) {
1356 	case K_RAW: 		/* switch to RAW scancode mode */
1357 	    scp->status |= KBD_RAW_MODE;
1358 	    return 0;
1359 
1360 	case K_XLATE:   	/* switch to XLT ascii mode */
1361 	    if (scp == cur_console && scp->status & KBD_RAW_MODE)
1362 		shfts = ctls = alts = agrs = metas = 0;
1363 	    scp->status &= ~KBD_RAW_MODE;
1364 	    return 0;
1365 	default:
1366 	    return EINVAL;
1367 	}
1368 	/* NOT REACHED */
1369 
1370     case KDGKBMODE:     	/* get keyboard mode */
1371 	*data = (scp->status & KBD_RAW_MODE) ? K_RAW : K_XLATE;
1372 	return 0;
1373 
1374     case KDMKTONE:      	/* sound the bell */
1375 	if (*(int*)data)
1376 	    do_bell(scp, (*(int*)data)&0xffff,
1377 		    (((*(int*)data)>>16)&0xffff)*hz/1000);
1378 	else
1379 	    do_bell(scp, scp->bell_pitch, scp->bell_duration);
1380 	return 0;
1381 
1382     case KIOCSOUND:     	/* make tone (*data) hz */
1383 	if (scp == cur_console) {
1384 	    if (*(int*)data) {
1385 		int pitch = timer_freq / *(int*)data;
1386 
1387 		/* set command for counter 2, 2 byte write */
1388 		if (acquire_timer2(TIMER_16BIT|TIMER_SQWAVE))
1389 		    return EBUSY;
1390 
1391 		/* set pitch */
1392 		outb(TIMER_CNTR2, pitch);
1393 		outb(TIMER_CNTR2, (pitch>>8));
1394 
1395 		/* enable counter 2 output to speaker */
1396 		outb(IO_PPI, inb(IO_PPI) | 3);
1397 	    }
1398 	    else {
1399 		/* disable counter 2 output to speaker */
1400 		outb(IO_PPI, inb(IO_PPI) & 0xFC);
1401 		release_timer2();
1402 	    }
1403 	}
1404 	return 0;
1405 
1406     case KDGKBTYPE:     	/* get keyboard type */
1407 	*data = 0;  		/* type not known (yet) */
1408 	return 0;
1409 
1410     case KDSETLED:      	/* set keyboard LED status */
1411 	if (*data >= 0 && *data <= LED_MASK) {
1412 	    scp->status &= ~LED_MASK;
1413 	    scp->status |= *data;
1414 	    if (scp == cur_console)
1415 		update_leds(scp->status);
1416 	    return 0;
1417 	}
1418 	return EINVAL;
1419 
1420     case KDGETLED:      	/* get keyboard LED status */
1421 	*data = scp->status & LED_MASK;
1422 	return 0;
1423 
1424     case GETFKEY:       	/* get functionkey string */
1425 	if (*(u_short*)data < n_fkey_tab) {
1426 	    fkeyarg_t *ptr = (fkeyarg_t*)data;
1427 	    bcopy(&fkey_tab[ptr->keynum].str, ptr->keydef,
1428 		  fkey_tab[ptr->keynum].len);
1429 	    ptr->flen = fkey_tab[ptr->keynum].len;
1430 	    return 0;
1431 	}
1432 	else
1433 	    return EINVAL;
1434 
1435     case SETFKEY:       	/* set functionkey string */
1436 	if (*(u_short*)data < n_fkey_tab) {
1437 	    fkeyarg_t *ptr = (fkeyarg_t*)data;
1438 	    bcopy(ptr->keydef, &fkey_tab[ptr->keynum].str,
1439 		  min(ptr->flen, MAXFK));
1440 	    fkey_tab[ptr->keynum].len = min(ptr->flen, MAXFK);
1441 	    return 0;
1442 	}
1443 	else
1444 	    return EINVAL;
1445 
1446     case GIO_SCRNMAP:   	/* get output translation table */
1447 	bcopy(&scr_map, data, sizeof(scr_map));
1448 	return 0;
1449 
1450     case PIO_SCRNMAP:   	/* set output translation table */
1451 	bcopy(data, &scr_map, sizeof(scr_map));
1452 	for (i=0; i<sizeof(scr_map); i++)
1453 	    scr_rmap[scr_map[i]] = i;
1454 	return 0;
1455 
1456     case GIO_KEYMAP:    	/* get keyboard translation table */
1457 	bcopy(&key_map, data, sizeof(key_map));
1458 	return 0;
1459 
1460     case PIO_KEYMAP:    	/* set keyboard translation table */
1461 	bcopy(data, &key_map, sizeof(key_map));
1462 	return 0;
1463 
1464     case PIO_FONT8x8:   	/* set 8x8 dot font */
1465 	if (!crtc_vga)
1466 	    return ENXIO;
1467 	bcopy(data, font_8, 8*256);
1468 	fonts_loaded |= FONT_8;
1469 	copy_font(LOAD, FONT_8, font_8);
1470 	if (flags & CHAR_CURSOR)
1471 	    set_destructive_cursor(scp);
1472 	return 0;
1473 
1474     case GIO_FONT8x8:   	/* get 8x8 dot font */
1475 	if (!crtc_vga)
1476 	    return ENXIO;
1477 	if (fonts_loaded & FONT_8) {
1478 	    bcopy(font_8, data, 8*256);
1479 	    return 0;
1480 	}
1481 	else
1482 	    return ENXIO;
1483 
1484     case PIO_FONT8x14:  	/* set 8x14 dot font */
1485 	if (!crtc_vga)
1486 	    return ENXIO;
1487 	bcopy(data, font_14, 14*256);
1488 	fonts_loaded |= FONT_14;
1489 	copy_font(LOAD, FONT_14, font_14);
1490 	if (flags & CHAR_CURSOR)
1491 	    set_destructive_cursor(scp);
1492 	return 0;
1493 
1494     case GIO_FONT8x14:  	/* get 8x14 dot font */
1495 	if (!crtc_vga)
1496 	    return ENXIO;
1497 	if (fonts_loaded & FONT_14) {
1498 	    bcopy(font_14, data, 14*256);
1499 	    return 0;
1500 	}
1501 	else
1502 	    return ENXIO;
1503 
1504     case PIO_FONT8x16:  	/* set 8x16 dot font */
1505 	if (!crtc_vga)
1506 	    return ENXIO;
1507 	bcopy(data, font_16, 16*256);
1508 	fonts_loaded |= FONT_16;
1509 	copy_font(LOAD, FONT_16, font_16);
1510 	if (flags & CHAR_CURSOR)
1511 	    set_destructive_cursor(scp);
1512 	return 0;
1513 
1514     case GIO_FONT8x16:  	/* get 8x16 dot font */
1515 	if (!crtc_vga)
1516 	    return ENXIO;
1517 	if (fonts_loaded & FONT_16) {
1518 	    bcopy(font_16, data, 16*256);
1519 	    return 0;
1520 	}
1521 	else
1522 	    return ENXIO;
1523     default:
1524 	break;
1525     }
1526 
1527     error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
1528     if (error >= 0)
1529 	return(error);
1530     error = ttioctl(tp, cmd, data, flag);
1531     if (error >= 0)
1532 	return(error);
1533     return(ENOTTY);
1534 }
1535 
1536 static void
1537 scstart(struct tty *tp)
1538 {
1539     struct clist *rbp;
1540     int s, len;
1541     u_char buf[PCBURST];
1542     scr_stat *scp = get_scr_stat(tp->t_dev);
1543 
1544     if (scp->status & SLKED || blink_in_progress)
1545 	return; /* XXX who repeats the call when the above flags are cleared? */
1546     s = spltty();
1547     if (!(tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))) {
1548 	tp->t_state |= TS_BUSY;
1549 	rbp = &tp->t_outq;
1550 	while (rbp->c_cc) {
1551 	    len = q_to_b(rbp, buf, PCBURST);
1552 	    splx(s);
1553 	    ansi_put(scp, buf, len);
1554 	    s = spltty();
1555 	}
1556 	tp->t_state &= ~TS_BUSY;
1557 	ttwwakeup(tp);
1558     }
1559     splx(s);
1560 }
1561 
1562 static void
1563 scmousestart(struct tty *tp)
1564 {
1565     struct clist *rbp;
1566     int s;
1567     u_char buf[PCBURST];
1568 
1569     s = spltty();
1570     if (!(tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))) {
1571 	tp->t_state |= TS_BUSY;
1572 	rbp = &tp->t_outq;
1573 	while (rbp->c_cc) {
1574 	    q_to_b(rbp, buf, PCBURST);
1575 	}
1576 	tp->t_state &= ~TS_BUSY;
1577 	ttwwakeup(tp);
1578     }
1579     splx(s);
1580 }
1581 
1582 void
1583 sccnprobe(struct consdev *cp)
1584 {
1585     struct isa_device *dvp;
1586 
1587     /*
1588      * Take control if we are the highest priority enabled display device.
1589      */
1590     dvp = find_display();
1591     if (dvp == NULL || dvp->id_driver != &scdriver) {
1592 	cp->cn_pri = CN_DEAD;
1593 	return;
1594     }
1595 
1596     if (!scvidprobe(dvp->id_unit, dvp->id_flags)) {
1597 	cp->cn_pri = CN_DEAD;
1598 	return;
1599     }
1600 
1601     /* initialize required fields */
1602     cp->cn_dev = makedev(CDEV_MAJOR, SC_CONSOLE);
1603     cp->cn_pri = CN_INTERNAL;
1604 
1605     sc_kbdc = kbdc_open(sc_port);
1606 }
1607 
1608 void
1609 sccninit(struct consdev *cp)
1610 {
1611     scinit();
1612 }
1613 
1614 void
1615 sccnputc(dev_t dev, int c)
1616 {
1617     u_char buf[1];
1618     int s;
1619     scr_stat *scp = console[0];
1620     term_stat save = scp->term;
1621 
1622     scp->term = kernel_console;
1623     current_default = &kernel_default;
1624     if (scp == cur_console && !(scp->status & UNKNOWN_MODE))
1625 	remove_cursor_image(scp);
1626     buf[0] = c;
1627     ansi_put(scp, buf, 1);
1628     kernel_console = scp->term;
1629     current_default = &user_default;
1630     scp->term = save;
1631     s = splclock();
1632     if (scp == cur_console && !(scp->status & UNKNOWN_MODE)) {
1633 	if (/* timer not running && */ (scp->start <= scp->end)) {
1634 	    sc_bcopy(scp->scr_buf + scp->start, Crtat + scp->start,
1635 		   (1 + scp->end - scp->start) * sizeof(u_short));
1636 	    scp->start = scp->xsize * scp->ysize;
1637 	    scp->end = 0;
1638 	}
1639     	scp->cursor_oldpos = scp->cursor_pos;
1640 	draw_cursor_image(scp);
1641     }
1642     splx(s);
1643 }
1644 
1645 int
1646 sccngetc(dev_t dev)
1647 {
1648     int s = spltty();       /* block scintr while we poll */
1649     int c = scgetc(SCGETC_CN);
1650     splx(s);
1651     return(c);
1652 }
1653 
1654 int
1655 sccncheckc(dev_t dev)
1656 {
1657     int c, s;
1658 
1659     s = spltty();
1660     c = scgetc(SCGETC_CN | SCGETC_NONBLOCK);
1661     splx(s);
1662     return(c == NOKEY ? -1 : c);	/* c == -1 can't happen */
1663 }
1664 
1665 static scr_stat
1666 *get_scr_stat(dev_t dev)
1667 {
1668     int unit = minor(dev);
1669 
1670     if (unit == SC_CONSOLE)
1671 	return console[0];
1672     if (unit >= MAXCONS || unit < 0)
1673 	return(NULL);
1674     return console[unit];
1675 }
1676 
1677 static int
1678 get_scr_num()
1679 {
1680     int i = 0;
1681 
1682     while ((i < MAXCONS) && (cur_console != console[i]))
1683 	i++;
1684     return i < MAXCONS ? i : 0;
1685 }
1686 
1687 static void
1688 scrn_timer(void *arg)
1689 {
1690     scr_stat *scp = cur_console;
1691     int s = spltty();
1692 
1693     /*
1694      * With release 2.1 of the Xaccel server, the keyboard is left
1695      * hanging pretty often. Apparently an interrupt from the
1696      * keyboard is lost, and I don't know why (yet).
1697      * This ugly hack calls scintr if input is ready for the keyboard
1698      * and conveniently hides the problem.			XXX
1699      */
1700     /* Try removing anything stuck in the keyboard controller; whether
1701      * it's a keyboard scan code or mouse data. `scintr()' doesn't
1702      * read the mouse data directly, but `kbdio' routines will, as a
1703      * side effect.
1704      */
1705     if (kbdc_lock(sc_kbdc, TRUE)) {
1706 	/*
1707 	 * We have seen the lock flag is not set. Let's reset the flag early;
1708 	 * otherwise `update_led()' failes which may want the lock
1709 	 * during `scintr()'.
1710 	 */
1711 	kbdc_lock(sc_kbdc, FALSE);
1712 	if (kbdc_data_ready(sc_kbdc))
1713 	    scintr(0);
1714     }
1715 
1716     /* should we just return ? */
1717     if ((scp->status&UNKNOWN_MODE) || blink_in_progress || switch_in_progress) {
1718 	timeout(scrn_timer, NULL, hz / 10);
1719 	splx(s);
1720 	return;
1721     }
1722 
1723     if (!scrn_blanked) {
1724 	/* update screen image */
1725 	if (scp->start <= scp->end) {
1726 	    sc_bcopy(scp->scr_buf + scp->start, Crtat + scp->start,
1727 		   (1 + scp->end - scp->start) * sizeof(u_short));
1728 	}
1729 
1730 	/* update "pseudo" mouse pointer image */
1731 	if ((scp->status & MOUSE_VISIBLE) && crtc_vga) {
1732 	    /* did mouse move since last time ? */
1733 	    if (scp->status & MOUSE_MOVED) {
1734 		/* do we need to remove old mouse pointer image ? */
1735 		if (scp->mouse_cut_start != NULL ||
1736 		    (scp->mouse_pos-scp->scr_buf) <= scp->start ||
1737 		    (scp->mouse_pos+scp->xsize+1-scp->scr_buf) >= scp->end) {
1738 		    remove_mouse_image(scp);
1739 		}
1740 		scp->status &= ~MOUSE_MOVED;
1741 		draw_mouse_image(scp);
1742 	    }
1743 	    else {
1744 		/* mouse didn't move, has it been overwritten ? */
1745 		if ((scp->mouse_pos+scp->xsize+1-scp->scr_buf) >= scp->start &&
1746 		    (scp->mouse_pos - scp->scr_buf) <= scp->end) {
1747 		    draw_mouse_image(scp);
1748 		}
1749 	    }
1750 	}
1751 
1752 	/* update cursor image */
1753 	if (scp->status & CURSOR_ENABLED) {
1754 	    /* did cursor move since last time ? */
1755 	    if (scp->cursor_pos != scp->cursor_oldpos) {
1756 		/* do we need to remove old cursor image ? */
1757 		if ((scp->cursor_oldpos - scp->scr_buf) < scp->start ||
1758 		    ((scp->cursor_oldpos - scp->scr_buf) > scp->end)) {
1759 		    remove_cursor_image(scp);
1760 		}
1761     		scp->cursor_oldpos = scp->cursor_pos;
1762 		draw_cursor_image(scp);
1763 	    }
1764 	    else {
1765 		/* cursor didn't move, has it been overwritten ? */
1766 		if (scp->cursor_pos - scp->scr_buf >= scp->start &&
1767 		    scp->cursor_pos - scp->scr_buf <= scp->end) {
1768 		    	draw_cursor_image(scp);
1769 		} else {
1770 		    /* if its a blinking cursor, we may have to update it */
1771 		    if (flags & BLINK_CURSOR)
1772 			draw_cursor_image(scp);
1773 		}
1774 	    }
1775 	    blinkrate++;
1776 	}
1777 
1778 	if (scp->mouse_cut_start != NULL)
1779 	    draw_cutmarking(scp);
1780 
1781 	scp->end = 0;
1782 	scp->start = scp->xsize*scp->ysize;
1783     }
1784     if (scrn_blank_time && (time.tv_sec > scrn_time_stamp+scrn_blank_time))
1785 	(*current_saver)(TRUE);
1786     timeout(scrn_timer, NULL, hz / 25);
1787     splx(s);
1788 }
1789 
1790 static void
1791 clear_screen(scr_stat *scp)
1792 {
1793     move_crsr(scp, 0, 0);
1794     scp->cursor_oldpos = scp->cursor_pos;
1795     fillw(scp->term.cur_color | scr_map[0x20], scp->scr_buf,
1796 	  scp->xsize * scp->ysize);
1797     mark_all(scp);
1798     remove_cutmarking(scp);
1799 }
1800 
1801 static int
1802 switch_scr(scr_stat *scp, u_int next_scr)
1803 {
1804     if (switch_in_progress && (cur_console->proc != pfind(cur_console->pid)))
1805 	switch_in_progress = FALSE;
1806 
1807     if (next_scr >= MAXCONS || switch_in_progress ||
1808 	(cur_console->smode.mode == VT_AUTO
1809 	 && cur_console->status & UNKNOWN_MODE)) {
1810 	do_bell(scp, BELL_PITCH, BELL_DURATION);
1811 	return EINVAL;
1812     }
1813 
1814     /* is the wanted virtual console open ? */
1815     if (next_scr) {
1816 	struct tty *tp = VIRTUAL_TTY(next_scr);
1817 	if (!(tp->t_state & TS_ISOPEN)) {
1818 	    do_bell(scp, BELL_PITCH, BELL_DURATION);
1819 	    return EINVAL;
1820 	}
1821     }
1822     /* delay switch if actively updating screen */
1823     if (write_in_progress || blink_in_progress) {
1824 	delayed_next_scr = next_scr+1;
1825 	return 0;
1826     }
1827     switch_in_progress = TRUE;
1828     old_scp = cur_console;
1829     new_scp = console[next_scr];
1830     wakeup((caddr_t)&new_scp->smode);
1831     if (new_scp == old_scp) {
1832 	switch_in_progress = FALSE;
1833 	delayed_next_scr = FALSE;
1834 	return 0;
1835     }
1836 
1837     /* has controlling process died? */
1838     if (old_scp->proc && (old_scp->proc != pfind(old_scp->pid)))
1839 	old_scp->smode.mode = VT_AUTO;
1840     if (new_scp->proc && (new_scp->proc != pfind(new_scp->pid)))
1841 	new_scp->smode.mode = VT_AUTO;
1842 
1843     /* check the modes and switch appropriately */
1844     if (old_scp->smode.mode == VT_PROCESS) {
1845 	old_scp->status |= SWITCH_WAIT_REL;
1846 	psignal(old_scp->proc, old_scp->smode.relsig);
1847     }
1848     else {
1849 	exchange_scr();
1850 	if (new_scp->smode.mode == VT_PROCESS) {
1851 	    new_scp->status |= SWITCH_WAIT_ACQ;
1852 	    psignal(new_scp->proc, new_scp->smode.acqsig);
1853 	}
1854 	else
1855 	    switch_in_progress = FALSE;
1856     }
1857     return 0;
1858 }
1859 
1860 static void
1861 exchange_scr(void)
1862 {
1863     move_crsr(old_scp, old_scp->xpos, old_scp->ypos);
1864     cur_console = new_scp;
1865     if (old_scp->mode != new_scp->mode || (old_scp->status & UNKNOWN_MODE)){
1866 	if (crtc_vga && video_mode_ptr)
1867 	    set_mode(new_scp);
1868     }
1869     move_crsr(new_scp, new_scp->xpos, new_scp->ypos);
1870     if ((old_scp->status & UNKNOWN_MODE) && crtc_vga) {
1871 	if (flags & CHAR_CURSOR)
1872 	    set_destructive_cursor(new_scp);
1873 	load_palette(palette);
1874     }
1875     if (old_scp->status & KBD_RAW_MODE || new_scp->status & KBD_RAW_MODE)
1876 	shfts = ctls = alts = agrs = metas = 0;
1877     update_leds(new_scp->status);
1878     delayed_next_scr = FALSE;
1879     mark_all(new_scp);
1880 }
1881 
1882 static void
1883 scan_esc(scr_stat *scp, u_char c)
1884 {
1885     static u_char ansi_col[16] =
1886 	{0, 4, 2, 6, 1, 5, 3, 7, 8, 12, 10, 14, 9, 13, 11, 15};
1887     int i, n;
1888     u_short *src, *dst, count;
1889 
1890     if (scp->term.esc == 1) {
1891 	switch (c) {
1892 
1893 	case '7':   /* Save cursor position */
1894 	    scp->saved_xpos = scp->xpos;
1895 	    scp->saved_ypos = scp->ypos;
1896 	    break;
1897 
1898 	case '8':   /* Restore saved cursor position */
1899 	    if (scp->saved_xpos >= 0 && scp->saved_ypos >= 0)
1900 		move_crsr(scp, scp->saved_xpos, scp->saved_ypos);
1901 	    break;
1902 
1903 	case '[':   /* Start ESC [ sequence */
1904 	    scp->term.esc = 2;
1905 	    scp->term.last_param = -1;
1906 	    for (i = scp->term.num_param; i < MAX_ESC_PAR; i++)
1907 		scp->term.param[i] = 1;
1908 	    scp->term.num_param = 0;
1909 	    return;
1910 
1911 	case 'M':   /* Move cursor up 1 line, scroll if at top */
1912 	    if (scp->ypos > 0)
1913 		move_crsr(scp, scp->xpos, scp->ypos - 1);
1914 	    else {
1915 		bcopy(scp->scr_buf, scp->scr_buf + scp->xsize,
1916 		       (scp->ysize - 1) * scp->xsize * sizeof(u_short));
1917 		fillw(scp->term.cur_color | scr_map[0x20],
1918 		      scp->scr_buf, scp->xsize);
1919     		mark_all(scp);
1920 	    }
1921 	    break;
1922 #if notyet
1923 	case 'Q':
1924 	    scp->term.esc = 4;
1925 	    break;
1926 #endif
1927 	case 'c':   /* Clear screen & home */
1928 	    clear_screen(scp);
1929 	    break;
1930 	}
1931     }
1932     else if (scp->term.esc == 2) {
1933 	if (c >= '0' && c <= '9') {
1934 	    if (scp->term.num_param < MAX_ESC_PAR) {
1935 	    if (scp->term.last_param != scp->term.num_param) {
1936 		scp->term.last_param = scp->term.num_param;
1937 		scp->term.param[scp->term.num_param] = 0;
1938 	    }
1939 	    else
1940 		scp->term.param[scp->term.num_param] *= 10;
1941 	    scp->term.param[scp->term.num_param] += c - '0';
1942 	    return;
1943 	    }
1944 	}
1945 	scp->term.num_param = scp->term.last_param + 1;
1946 	switch (c) {
1947 
1948 	case ';':
1949 	    if (scp->term.num_param < MAX_ESC_PAR)
1950 		return;
1951 	    break;
1952 
1953 	case '=':
1954 	    scp->term.esc = 3;
1955 	    scp->term.last_param = -1;
1956 	    for (i = scp->term.num_param; i < MAX_ESC_PAR; i++)
1957 		scp->term.param[i] = 1;
1958 	    scp->term.num_param = 0;
1959 	    return;
1960 
1961 	case 'A':   /* up n rows */
1962 	    n = scp->term.param[0]; if (n < 1) n = 1;
1963 	    move_crsr(scp, scp->xpos, scp->ypos - n);
1964 	    break;
1965 
1966 	case 'B':   /* down n rows */
1967 	    n = scp->term.param[0]; if (n < 1) n = 1;
1968 	    move_crsr(scp, scp->xpos, scp->ypos + n);
1969 	    break;
1970 
1971 	case 'C':   /* right n columns */
1972 	    n = scp->term.param[0]; if (n < 1) n = 1;
1973 	    move_crsr(scp, scp->xpos + n, scp->ypos);
1974 	    break;
1975 
1976 	case 'D':   /* left n columns */
1977 	    n = scp->term.param[0]; if (n < 1) n = 1;
1978 	    move_crsr(scp, scp->xpos - n, scp->ypos);
1979 	    break;
1980 
1981 	case 'E':   /* cursor to start of line n lines down */
1982 	    n = scp->term.param[0]; if (n < 1) n = 1;
1983 	    move_crsr(scp, 0, scp->ypos + n);
1984 	    break;
1985 
1986 	case 'F':   /* cursor to start of line n lines up */
1987 	    n = scp->term.param[0]; if (n < 1) n = 1;
1988 	    move_crsr(scp, 0, scp->ypos - n);
1989 	    break;
1990 
1991 	case 'f':   /* Cursor move */
1992 	case 'H':
1993 	    if (scp->term.num_param == 0)
1994 		move_crsr(scp, 0, 0);
1995 	    else if (scp->term.num_param == 2)
1996 		move_crsr(scp, scp->term.param[1] - 1, scp->term.param[0] - 1);
1997 	    break;
1998 
1999 	case 'J':   /* Clear all or part of display */
2000 	    if (scp->term.num_param == 0)
2001 		n = 0;
2002 	    else
2003 		n = scp->term.param[0];
2004 	    switch (n) {
2005 	    case 0: /* clear form cursor to end of display */
2006 		fillw(scp->term.cur_color | scr_map[0x20],
2007 		      scp->cursor_pos,
2008 		      scp->scr_buf + scp->xsize * scp->ysize - scp->cursor_pos);
2009     		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2010     		mark_for_update(scp, scp->xsize * scp->ysize);
2011 		remove_cutmarking(scp);
2012 		break;
2013 	    case 1: /* clear from beginning of display to cursor */
2014 		fillw(scp->term.cur_color | scr_map[0x20],
2015 		      scp->scr_buf,
2016 		      scp->cursor_pos - scp->scr_buf);
2017     		mark_for_update(scp, 0);
2018     		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2019 		remove_cutmarking(scp);
2020 		break;
2021 	    case 2: /* clear entire display */
2022 		fillw(scp->term.cur_color | scr_map[0x20], scp->scr_buf,
2023 		      scp->xsize * scp->ysize);
2024 		mark_all(scp);
2025 		remove_cutmarking(scp);
2026 		break;
2027 	    }
2028 	    break;
2029 
2030 	case 'K':   /* Clear all or part of line */
2031 	    if (scp->term.num_param == 0)
2032 		n = 0;
2033 	    else
2034 		n = scp->term.param[0];
2035 	    switch (n) {
2036 	    case 0: /* clear form cursor to end of line */
2037 		fillw(scp->term.cur_color | scr_map[0x20],
2038 		      scp->cursor_pos,
2039 		      scp->xsize - scp->xpos);
2040     		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2041     		mark_for_update(scp, scp->cursor_pos - scp->scr_buf +
2042 				scp->xsize - scp->xpos);
2043 		break;
2044 	    case 1: /* clear from beginning of line to cursor */
2045 		fillw(scp->term.cur_color | scr_map[0x20],
2046 		      scp->cursor_pos - scp->xpos,
2047 		      scp->xpos + 1);
2048     		mark_for_update(scp, scp->ypos * scp->xsize);
2049     		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2050 		break;
2051 	    case 2: /* clear entire line */
2052 		fillw(scp->term.cur_color | scr_map[0x20],
2053 		      scp->cursor_pos - scp->xpos,
2054 		      scp->xsize);
2055     		mark_for_update(scp, scp->ypos * scp->xsize);
2056     		mark_for_update(scp, (scp->ypos + 1) * scp->xsize);
2057 		break;
2058 	    }
2059 	    break;
2060 
2061 	case 'L':   /* Insert n lines */
2062 	    n = scp->term.param[0]; if (n < 1) n = 1;
2063 	    if (n > scp->ysize - scp->ypos)
2064 		n = scp->ysize - scp->ypos;
2065 	    src = scp->scr_buf + scp->ypos * scp->xsize;
2066 	    dst = src + n * scp->xsize;
2067 	    count = scp->ysize - (scp->ypos + n);
2068 	    bcopy(src, dst, count * scp->xsize * sizeof(u_short));
2069 	    fillw(scp->term.cur_color | scr_map[0x20], src,
2070 		  n * scp->xsize);
2071 	    mark_for_update(scp, scp->ypos * scp->xsize);
2072 	    mark_for_update(scp, scp->xsize * scp->ysize);
2073 	    break;
2074 
2075 	case 'M':   /* Delete n lines */
2076 	    n = scp->term.param[0]; if (n < 1) n = 1;
2077 	    if (n > scp->ysize - scp->ypos)
2078 		n = scp->ysize - scp->ypos;
2079 	    dst = scp->scr_buf + scp->ypos * scp->xsize;
2080 	    src = dst + n * scp->xsize;
2081 	    count = scp->ysize - (scp->ypos + n);
2082 	    bcopy(src, dst, count * scp->xsize * sizeof(u_short));
2083 	    src = dst + count * scp->xsize;
2084 	    fillw(scp->term.cur_color | scr_map[0x20], src,
2085 		  n * scp->xsize);
2086 	    mark_for_update(scp, scp->ypos * scp->xsize);
2087 	    mark_for_update(scp, scp->xsize * scp->ysize);
2088 	    break;
2089 
2090 	case 'P':   /* Delete n chars */
2091 	    n = scp->term.param[0]; if (n < 1) n = 1;
2092 	    if (n > scp->xsize - scp->xpos)
2093 		n = scp->xsize - scp->xpos;
2094 	    dst = scp->cursor_pos;
2095 	    src = dst + n;
2096 	    count = scp->xsize - (scp->xpos + n);
2097 	    bcopy(src, dst, count * sizeof(u_short));
2098 	    src = dst + count;
2099 	    fillw(scp->term.cur_color | scr_map[0x20], src, n);
2100 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2101 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf + n + count);
2102 	    break;
2103 
2104 	case '@':   /* Insert n chars */
2105 	    n = scp->term.param[0]; if (n < 1) n = 1;
2106 	    if (n > scp->xsize - scp->xpos)
2107 		n = scp->xsize - scp->xpos;
2108 	    src = scp->cursor_pos;
2109 	    dst = src + n;
2110 	    count = scp->xsize - (scp->xpos + n);
2111 	    bcopy(src, dst, count * sizeof(u_short));
2112 	    fillw(scp->term.cur_color | scr_map[0x20], src, n);
2113 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2114 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf + n + count);
2115 	    break;
2116 
2117 	case 'S':   /* scroll up n lines */
2118 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2119 	    if (n > scp->ysize)
2120 		n = scp->ysize;
2121 	    bcopy(scp->scr_buf + (scp->xsize * n),
2122 		   scp->scr_buf,
2123 		   scp->xsize * (scp->ysize - n) * sizeof(u_short));
2124 	    fillw(scp->term.cur_color | scr_map[0x20],
2125 		  scp->scr_buf + scp->xsize * (scp->ysize - n),
2126 		  scp->xsize * n);
2127     	    mark_all(scp);
2128 	    break;
2129 
2130 	case 'T':   /* scroll down n lines */
2131 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2132 	    if (n > scp->ysize)
2133 		n = scp->ysize;
2134 	    bcopy(scp->scr_buf,
2135 		  scp->scr_buf + (scp->xsize * n),
2136 		  scp->xsize * (scp->ysize - n) *
2137 		  sizeof(u_short));
2138 	    fillw(scp->term.cur_color | scr_map[0x20],
2139 		  scp->scr_buf, scp->xsize * n);
2140     	    mark_all(scp);
2141 	    break;
2142 
2143 	case 'X':   /* erase n characters in line */
2144 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2145 	    if (n > scp->xsize - scp->xpos)
2146 		n = scp->xsize - scp->xpos;
2147 	    fillw(scp->term.cur_color | scr_map[0x20],
2148 		  scp->cursor_pos, n);
2149 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2150 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf + n);
2151 	    break;
2152 
2153 	case 'Z':   /* move n tabs backwards */
2154 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2155 	    if ((i = scp->xpos & 0xf8) == scp->xpos)
2156 		i -= 8*n;
2157 	    else
2158 		i -= 8*(n-1);
2159 	    if (i < 0)
2160 		i = 0;
2161 	    move_crsr(scp, i, scp->ypos);
2162 	    break;
2163 
2164 	case '`':   /* move cursor to column n */
2165 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2166 	    move_crsr(scp, n - 1, scp->ypos);
2167 	    break;
2168 
2169 	case 'a':   /* move cursor n columns to the right */
2170 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2171 	    move_crsr(scp, scp->xpos + n, scp->ypos);
2172 	    break;
2173 
2174 	case 'd':   /* move cursor to row n */
2175 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2176 	    move_crsr(scp, scp->xpos, n - 1);
2177 	    break;
2178 
2179 	case 'e':   /* move cursor n rows down */
2180 	    n = scp->term.param[0]; if (n < 1)  n = 1;
2181 	    move_crsr(scp, scp->xpos, scp->ypos + n);
2182 	    break;
2183 
2184 	case 'm':   /* change attribute */
2185 	    if (scp->term.num_param == 0) {
2186 		scp->term.attr_mask = NORMAL_ATTR;
2187 		scp->term.cur_attr =
2188 		    scp->term.cur_color = scp->term.std_color;
2189 		break;
2190 	    }
2191 	    for (i = 0; i < scp->term.num_param; i++) {
2192 		switch (n = scp->term.param[i]) {
2193 		case 0: /* back to normal */
2194 		    scp->term.attr_mask = NORMAL_ATTR;
2195 		    scp->term.cur_attr =
2196 			scp->term.cur_color = scp->term.std_color;
2197 		    break;
2198 		case 1: /* bold */
2199 		    scp->term.attr_mask |= BOLD_ATTR;
2200 		    scp->term.cur_attr = mask2attr(&scp->term);
2201 		    break;
2202 		case 4: /* underline */
2203 		    scp->term.attr_mask |= UNDERLINE_ATTR;
2204 		    scp->term.cur_attr = mask2attr(&scp->term);
2205 		    break;
2206 		case 5: /* blink */
2207 		    scp->term.attr_mask |= BLINK_ATTR;
2208 		    scp->term.cur_attr = mask2attr(&scp->term);
2209 		    break;
2210 		case 7: /* reverse video */
2211 		    scp->term.attr_mask |= REVERSE_ATTR;
2212 		    scp->term.cur_attr = mask2attr(&scp->term);
2213 		    break;
2214 		case 30: case 31: /* set fg color */
2215 		case 32: case 33: case 34:
2216 		case 35: case 36: case 37:
2217 		    scp->term.attr_mask |= FOREGROUND_CHANGED;
2218 		    scp->term.cur_color =
2219 			(scp->term.cur_color&0xF000) | (ansi_col[(n-30)&7]<<8);
2220 		    scp->term.cur_attr = mask2attr(&scp->term);
2221 		    break;
2222 		case 40: case 41: /* set bg color */
2223 		case 42: case 43: case 44:
2224 		case 45: case 46: case 47:
2225 		    scp->term.attr_mask |= BACKGROUND_CHANGED;
2226 		    scp->term.cur_color =
2227 			(scp->term.cur_color&0x0F00) | (ansi_col[(n-40)&7]<<12);
2228 		    scp->term.cur_attr = mask2attr(&scp->term);
2229 		    break;
2230 		}
2231 	    }
2232 	    break;
2233 
2234 	case 's':   /* Save cursor position */
2235 	    scp->saved_xpos = scp->xpos;
2236 	    scp->saved_ypos = scp->ypos;
2237 	    break;
2238 
2239 	case 'u':   /* Restore saved cursor position */
2240 	    if (scp->saved_xpos >= 0 && scp->saved_ypos >= 0)
2241 		move_crsr(scp, scp->saved_xpos, scp->saved_ypos);
2242 	    break;
2243 
2244 	case 'x':
2245 	    if (scp->term.num_param == 0)
2246 		n = 0;
2247 	    else
2248 		n = scp->term.param[0];
2249 	    switch (n) {
2250 	    case 0:     /* reset attributes */
2251 		scp->term.attr_mask = NORMAL_ATTR;
2252 		scp->term.cur_attr =
2253 		    scp->term.cur_color = scp->term.std_color =
2254 		    current_default->std_color;
2255 		scp->term.rev_color = current_default->rev_color;
2256 		break;
2257 	    case 1:     /* set ansi background */
2258 		scp->term.attr_mask &= ~BACKGROUND_CHANGED;
2259 		scp->term.cur_color = scp->term.std_color =
2260 		    (scp->term.std_color & 0x0F00) |
2261 		    (ansi_col[(scp->term.param[1])&0x0F]<<12);
2262 		scp->term.cur_attr = mask2attr(&scp->term);
2263 		break;
2264 	    case 2:     /* set ansi foreground */
2265 		scp->term.attr_mask &= ~FOREGROUND_CHANGED;
2266 		scp->term.cur_color = scp->term.std_color =
2267 		    (scp->term.std_color & 0xF000) |
2268 		    (ansi_col[(scp->term.param[1])&0x0F]<<8);
2269 		scp->term.cur_attr = mask2attr(&scp->term);
2270 		break;
2271 	    case 3:     /* set ansi attribute directly */
2272 		scp->term.attr_mask &= ~(FOREGROUND_CHANGED|BACKGROUND_CHANGED);
2273 		scp->term.cur_color = scp->term.std_color =
2274 		    (scp->term.param[1]&0xFF)<<8;
2275 		scp->term.cur_attr = mask2attr(&scp->term);
2276 		break;
2277 	    case 5:     /* set ansi reverse video background */
2278 		scp->term.rev_color =
2279 		    (scp->term.rev_color & 0x0F00) |
2280 		    (ansi_col[(scp->term.param[1])&0x0F]<<12);
2281 		scp->term.cur_attr = mask2attr(&scp->term);
2282 		break;
2283 	    case 6:     /* set ansi reverse video foreground */
2284 		scp->term.rev_color =
2285 		    (scp->term.rev_color & 0xF000) |
2286 		    (ansi_col[(scp->term.param[1])&0x0F]<<8);
2287 		scp->term.cur_attr = mask2attr(&scp->term);
2288 		break;
2289 	    case 7:     /* set ansi reverse video directly */
2290 		scp->term.rev_color =
2291 		    (scp->term.param[1]&0xFF)<<8;
2292 		scp->term.cur_attr = mask2attr(&scp->term);
2293 		break;
2294 	    }
2295 	    break;
2296 
2297 	case 'z':   /* switch to (virtual) console n */
2298 	    if (scp->term.num_param == 1)
2299 		switch_scr(scp, scp->term.param[0]);
2300 	    break;
2301 	}
2302     }
2303     else if (scp->term.esc == 3) {
2304 	if (c >= '0' && c <= '9') {
2305 	    if (scp->term.num_param < MAX_ESC_PAR) {
2306 	    if (scp->term.last_param != scp->term.num_param) {
2307 		scp->term.last_param = scp->term.num_param;
2308 		scp->term.param[scp->term.num_param] = 0;
2309 	    }
2310 	    else
2311 		scp->term.param[scp->term.num_param] *= 10;
2312 	    scp->term.param[scp->term.num_param] += c - '0';
2313 	    return;
2314 	    }
2315 	}
2316 	scp->term.num_param = scp->term.last_param + 1;
2317 	switch (c) {
2318 
2319 	case ';':
2320 	    if (scp->term.num_param < MAX_ESC_PAR)
2321 		return;
2322 	    break;
2323 
2324 	case 'A':   /* set display border color */
2325 	    if ((scp->term.num_param == 1) && crtc_vga) {
2326 		scp->border=scp->term.param[0] & 0xff;
2327 		if (scp == cur_console)
2328 		    set_border(scp->border);
2329             }
2330 	    break;
2331 
2332 	case 'B':   /* set bell pitch and duration */
2333 	    if (scp->term.num_param == 2) {
2334 		scp->bell_pitch = scp->term.param[0];
2335 		scp->bell_duration = scp->term.param[1]*10;
2336 	    }
2337 	    break;
2338 
2339 	case 'C':   /* set cursor type & shape */
2340 	    if (scp->term.num_param == 1) {
2341 		if (scp->term.param[0] & 0x01)
2342 		    flags |= BLINK_CURSOR;
2343 		else
2344 		    flags &= ~BLINK_CURSOR;
2345 		if ((scp->term.param[0] & 0x02) && crtc_vga) {
2346 		    flags |= CHAR_CURSOR;
2347 		    set_destructive_cursor(scp);
2348 		} else
2349 		    flags &= ~CHAR_CURSOR;
2350 	    }
2351 	    else if (scp->term.num_param == 2) {
2352 		scp->cursor_start = scp->term.param[0] & 0x1F;
2353 		scp->cursor_end = scp->term.param[1] & 0x1F;
2354 		if (flags & CHAR_CURSOR)
2355 			set_destructive_cursor(scp);
2356 	    }
2357 	    break;
2358 
2359 	case 'F':   /* set ansi foreground */
2360 	    if (scp->term.num_param == 1) {
2361 		scp->term.attr_mask &= ~FOREGROUND_CHANGED;
2362 		scp->term.cur_color = scp->term.std_color =
2363 		    (scp->term.std_color & 0xF000)
2364 		    | ((scp->term.param[0] & 0x0F) << 8);
2365 		scp->term.cur_attr = mask2attr(&scp->term);
2366 	    }
2367 	    break;
2368 
2369 	case 'G':   /* set ansi background */
2370 	    if (scp->term.num_param == 1) {
2371 		scp->term.attr_mask &= ~BACKGROUND_CHANGED;
2372 		scp->term.cur_color = scp->term.std_color =
2373 		    (scp->term.std_color & 0x0F00)
2374 		    | ((scp->term.param[0] & 0x0F) << 12);
2375 		scp->term.cur_attr = mask2attr(&scp->term);
2376 	    }
2377 	    break;
2378 
2379 	case 'H':   /* set ansi reverse video foreground */
2380 	    if (scp->term.num_param == 1) {
2381 		scp->term.rev_color =
2382 		    (scp->term.rev_color & 0xF000)
2383 		    | ((scp->term.param[0] & 0x0F) << 8);
2384 		scp->term.cur_attr = mask2attr(&scp->term);
2385 	    }
2386 	    break;
2387 
2388 	case 'I':   /* set ansi reverse video background */
2389 	    if (scp->term.num_param == 1) {
2390 		scp->term.rev_color =
2391 		    (scp->term.rev_color & 0x0F00)
2392 		    | ((scp->term.param[0] & 0x0F) << 12);
2393 		scp->term.cur_attr = mask2attr(&scp->term);
2394 	    }
2395 	    break;
2396 	}
2397     }
2398     scp->term.esc = 0;
2399 }
2400 
2401 static void
2402 ansi_put(scr_stat *scp, u_char *buf, int len)
2403 {
2404     u_char *ptr = buf;
2405 
2406     /* make screensaver happy */
2407     if (scp == cur_console) {
2408 	scrn_time_stamp = time.tv_sec;
2409 	if (scrn_blanked) {
2410 	    (*current_saver)(FALSE);
2411 	    mark_all(scp);
2412 	}
2413     }
2414     write_in_progress++;
2415 outloop:
2416     if (scp->term.esc) {
2417 	scan_esc(scp, *ptr++);
2418 	len--;
2419     }
2420     else if (PRINTABLE(*ptr)) {     /* Print only printables */
2421  	int cnt = len <= (scp->xsize-scp->xpos) ? len : (scp->xsize-scp->xpos);
2422  	u_short cur_attr = scp->term.cur_attr;
2423  	u_short *cursor_pos = scp->cursor_pos;
2424 	do {
2425 	    /*
2426 	     * gcc-2.6.3 generates poor (un)sign extension code.  Casting the
2427 	     * pointers in the following to volatile should have no effect,
2428 	     * but in fact speeds up this inner loop from 26 to 18 cycles
2429 	     * (+ cache misses) on i486's.
2430 	     */
2431 #define	UCVP(ucp)	((u_char volatile *)(ucp))
2432 	    *cursor_pos++ = UCVP(scr_map)[*UCVP(ptr)] | cur_attr;
2433 	    ptr++;
2434 	    cnt--;
2435 	} while (cnt && PRINTABLE(*ptr));
2436 	len -= (cursor_pos - scp->cursor_pos);
2437 	scp->xpos += (cursor_pos - scp->cursor_pos);
2438 	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2439 	mark_for_update(scp, cursor_pos - scp->scr_buf);
2440 	scp->cursor_pos = cursor_pos;
2441 	if (scp->xpos >= scp->xsize) {
2442 	    scp->xpos = 0;
2443 	    scp->ypos++;
2444 	}
2445     }
2446     else  {
2447 	switch(*ptr) {
2448 	case 0x07:
2449 	    do_bell(scp, scp->bell_pitch, scp->bell_duration);
2450 	    break;
2451 
2452 	case 0x08:      /* non-destructive backspace */
2453 	    if (scp->cursor_pos > scp->scr_buf) {
2454 	    	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2455 		scp->cursor_pos--;
2456 	    	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2457 		if (scp->xpos > 0)
2458 		    scp->xpos--;
2459 		else {
2460 		    scp->xpos += scp->xsize - 1;
2461 		    scp->ypos--;
2462 		}
2463 	    }
2464 	    break;
2465 
2466 	case 0x09:  /* non-destructive tab */
2467 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2468 	    scp->cursor_pos += (8 - scp->xpos % 8u);
2469 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2470 	    if ((scp->xpos += (8 - scp->xpos % 8u)) >= scp->xsize) {
2471 	        scp->xpos = 0;
2472 	        scp->ypos++;
2473 	    }
2474 	    break;
2475 
2476 	case 0x0a:  /* newline, same pos */
2477 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2478 	    scp->cursor_pos += scp->xsize;
2479 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2480 	    scp->ypos++;
2481 	    break;
2482 
2483 	case 0x0c:  /* form feed, clears screen */
2484 	    clear_screen(scp);
2485 	    break;
2486 
2487 	case 0x0d:  /* return, return to pos 0 */
2488 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2489 	    scp->cursor_pos -= scp->xpos;
2490 	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
2491 	    scp->xpos = 0;
2492 	    break;
2493 
2494 	case 0x1b:  /* start escape sequence */
2495 	    scp->term.esc = 1;
2496 	    scp->term.num_param = 0;
2497 	    break;
2498 	}
2499 	ptr++; len--;
2500     }
2501     /* do we have to scroll ?? */
2502     if (scp->cursor_pos >= scp->scr_buf + scp->ysize * scp->xsize) {
2503 	remove_cutmarking(scp);
2504 	if (scp->history) {
2505 	    bcopy(scp->scr_buf, scp->history_head,
2506 		   scp->xsize * sizeof(u_short));
2507 	    scp->history_head += scp->xsize;
2508 	    if (scp->history_head + scp->xsize >
2509 		scp->history + scp->history_size)
2510 		scp->history_head = scp->history;
2511 	}
2512 	bcopy(scp->scr_buf + scp->xsize, scp->scr_buf,
2513 	       scp->xsize * (scp->ysize - 1) * sizeof(u_short));
2514 	fillw(scp->term.cur_color | scr_map[0x20],
2515 	      scp->scr_buf + scp->xsize * (scp->ysize - 1),
2516 	      scp->xsize);
2517 	scp->cursor_pos -= scp->xsize;
2518 	scp->ypos--;
2519     	mark_all(scp);
2520     }
2521     if (len)
2522 	goto outloop;
2523     write_in_progress--;
2524     if (delayed_next_scr)
2525 	switch_scr(scp, delayed_next_scr - 1);
2526 }
2527 
2528 static void
2529 scinit(void)
2530 {
2531     u_int hw_cursor;
2532     u_int i;
2533 
2534     if (init_done != COLD)
2535 	return;
2536     init_done = WARM;
2537 
2538     /*
2539      * Ensure a zero start address.  This is mainly to recover after
2540      * switching from pcvt using userconfig().  The registers are w/o
2541      * for old hardware so it's too hard to relocate the active screen
2542      * memory.
2543      */
2544     outb(crtc_addr, 12);
2545     outb(crtc_addr + 1, 0);
2546     outb(crtc_addr, 13);
2547     outb(crtc_addr + 1, 0);
2548 
2549     /* extract cursor location */
2550     outb(crtc_addr, 14);
2551     hw_cursor = inb(crtc_addr + 1) << 8;
2552     outb(crtc_addr, 15);
2553     hw_cursor |= inb(crtc_addr + 1);
2554 
2555     /*
2556      * Validate cursor location.  It may be off the screen.  Then we must
2557      * not use it for the initial buffer offset.
2558      */
2559     if (hw_cursor >= ROW * COL)
2560 	hw_cursor = (ROW - 1) * COL;
2561 
2562     /* move hardware cursor out of the way */
2563     outb(crtc_addr, 14);
2564     outb(crtc_addr + 1, 0xff);
2565     outb(crtc_addr, 15);
2566     outb(crtc_addr + 1, 0xff);
2567 
2568     /* set up the first console */
2569     current_default = &user_default;
2570     console[0] = &main_console;
2571     init_scp(console[0]);
2572     cur_console = console[0];
2573 
2574     /* discard the video mode table if we are not familiar with it... */
2575     if (video_mode_ptr) {
2576         if (comp_vgaregs(vgaregs, video_mode_ptr + 64*console[0]->mode))
2577             video_mode_ptr = NULL;
2578     }
2579 
2580     /* copy screen to temporary buffer */
2581     sc_bcopy(Crtat, sc_buffer,
2582 	   console[0]->xsize * console[0]->ysize * sizeof(u_short));
2583 
2584     console[0]->scr_buf = console[0]->mouse_pos = sc_buffer;
2585     console[0]->cursor_pos = console[0]->cursor_oldpos = sc_buffer + hw_cursor;
2586     console[0]->xpos = hw_cursor % COL;
2587     console[0]->ypos = hw_cursor / COL;
2588     for (i=1; i<MAXCONS; i++)
2589 	console[i] = NULL;
2590     kernel_console.esc = 0;
2591     kernel_console.attr_mask = NORMAL_ATTR;
2592     kernel_console.cur_attr =
2593 	kernel_console.cur_color = kernel_console.std_color =
2594 	kernel_default.std_color;
2595     kernel_console.rev_color = kernel_default.rev_color;
2596 
2597     /* initialize mapscrn arrays to a one to one map */
2598     for (i=0; i<sizeof(scr_map); i++) {
2599 	scr_map[i] = scr_rmap[i] = i;
2600     }
2601 
2602     /* Save font and palette if VGA */
2603     if (crtc_vga) {
2604 	copy_font(SAVE, FONT_16, font_16);
2605 	fonts_loaded = FONT_16;
2606 	save_palette();
2607     }
2608 
2609 #ifdef SC_SPLASH_SCREEN
2610     /*
2611      * Now put up a graphics image, and maybe cycle a
2612      * couble of palette entries for simple animation.
2613      */
2614     toggle_splash_screen(cur_console);
2615 #endif
2616 }
2617 
2618 static scr_stat
2619 *alloc_scp()
2620 {
2621     scr_stat *scp;
2622 
2623     scp = (scr_stat *)malloc(sizeof(scr_stat), M_DEVBUF, M_WAITOK);
2624     init_scp(scp);
2625     scp->scr_buf = scp->cursor_pos = scp->cursor_oldpos =
2626 	(u_short *)malloc(scp->xsize*scp->ysize*sizeof(u_short),
2627 			  M_DEVBUF, M_WAITOK);
2628     scp->mouse_pos = scp->mouse_oldpos =
2629 	scp->scr_buf + ((scp->mouse_ypos/scp->font_size)*scp->xsize +
2630 			scp->mouse_xpos/8);
2631     scp->history_head = scp->history_pos = scp->history =
2632 	(u_short *)malloc(scp->history_size*sizeof(u_short),
2633 			  M_DEVBUF, M_WAITOK);
2634     bzero(scp->history_head, scp->history_size*sizeof(u_short));
2635 /* SOS
2636     if (crtc_vga && video_mode_ptr)
2637 	set_mode(scp);
2638 */
2639     clear_screen(scp);
2640     return scp;
2641 }
2642 
2643 static void
2644 init_scp(scr_stat *scp)
2645 {
2646     if (crtc_vga)
2647 	if (crtc_addr == MONO_BASE)
2648 	    scp->mode = M_VGA_M80x25;
2649 	else
2650 	    scp->mode = M_VGA_C80x25;
2651     else
2652 	if (crtc_addr == MONO_BASE)
2653 	    scp->mode = M_B80x25;
2654 	else
2655 	    scp->mode = M_C80x25;
2656 
2657     scp->font_size = 16;
2658     scp->xsize = COL;
2659     scp->ysize = ROW;
2660     scp->xpos = scp->ypos = 0;
2661     scp->saved_xpos = scp->saved_ypos = -1;
2662     scp->start = scp->xsize * scp->ysize;
2663     scp->end = 0;
2664     scp->term.esc = 0;
2665     scp->term.attr_mask = NORMAL_ATTR;
2666     scp->term.cur_attr =
2667 	scp->term.cur_color = scp->term.std_color =
2668 	current_default->std_color;
2669     scp->term.rev_color = current_default->rev_color;
2670     scp->border = BG_BLACK;
2671     scp->cursor_start = *(char *)pa_to_va(0x461);
2672     scp->cursor_end = *(char *)pa_to_va(0x460);
2673     scp->mouse_xpos = scp->xsize*8/2;
2674     scp->mouse_ypos = scp->ysize*scp->font_size/2;
2675     scp->mouse_cut_start = scp->mouse_cut_end = NULL;
2676     scp->mouse_signal = 0;
2677     scp->mouse_pid = 0;
2678     scp->mouse_proc = NULL;
2679     scp->bell_pitch = BELL_PITCH;
2680     scp->bell_duration = BELL_DURATION;
2681     scp->status = (*(char *)pa_to_va(0x417) & 0x20) ? NLKED : 0;
2682     scp->status |= CURSOR_ENABLED;
2683     scp->pid = 0;
2684     scp->proc = NULL;
2685     scp->smode.mode = VT_AUTO;
2686     scp->history_head = scp->history_pos = scp->history = NULL;
2687     scp->history_size = HISTORY_SIZE;
2688 }
2689 
2690 static u_char
2691 *get_fstr(u_int c, u_int *len)
2692 {
2693     u_int i;
2694 
2695     if (!(c & FKEY))
2696 	return(NULL);
2697     i = (c & 0xFF) - F_FN;
2698     if (i > n_fkey_tab)
2699 	return(NULL);
2700     *len = fkey_tab[i].len;
2701     return(fkey_tab[i].str);
2702 }
2703 
2704 static void
2705 history_to_screen(scr_stat *scp)
2706 {
2707     int i;
2708 
2709     for (i=0; i<scp->ysize; i++)
2710 	bcopy(scp->history + (((scp->history_pos - scp->history) +
2711 	       scp->history_size-((i+1)*scp->xsize))%scp->history_size),
2712 	       scp->scr_buf + (scp->xsize * (scp->ysize-1 - i)),
2713 	       scp->xsize * sizeof(u_short));
2714     mark_all(scp);
2715 }
2716 
2717 static int
2718 history_up_line(scr_stat *scp)
2719 {
2720     if (WRAPHIST(scp, scp->history_pos, -(scp->xsize*scp->ysize)) !=
2721 	scp->history_head) {
2722 	scp->history_pos = WRAPHIST(scp, scp->history_pos, -scp->xsize);
2723 	history_to_screen(scp);
2724 	return 0;
2725     }
2726     else
2727 	return -1;
2728 }
2729 
2730 static int
2731 history_down_line(scr_stat *scp)
2732 {
2733     if (scp->history_pos != scp->history_head) {
2734 	scp->history_pos = WRAPHIST(scp, scp->history_pos, scp->xsize);
2735 	history_to_screen(scp);
2736 	return 0;
2737     }
2738     else
2739 	return -1;
2740 }
2741 
2742 /*
2743  * scgetc(flags) - get character from keyboard.
2744  * If flags & SCGETC_CN, then avoid harmful side effects.
2745  * If flags & SCGETC_NONBLOCK, then wait until a key is pressed, else
2746  * return NOKEY if there is nothing there.
2747  */
2748 static u_int
2749 scgetc(u_int flags)
2750 {
2751     struct key_t *key;
2752     u_char scancode, keycode;
2753     u_int state, action;
2754     int c;
2755     static u_char esc_flag = 0, compose = 0;
2756     static u_int chr = 0;
2757 
2758 next_code:
2759     /* first see if there is something in the keyboard port */
2760     if (flags & SCGETC_NONBLOCK) {
2761 	c = read_kbd_data_no_wait(sc_kbdc);
2762 	if (c == -1)
2763 	    return(NOKEY);
2764     } else {
2765 	do {
2766 	    c = read_kbd_data(sc_kbdc);
2767 	} while(c == -1);
2768     }
2769     scancode = (u_char)c;
2770 
2771     /* do the /dev/random device a favour */
2772     if (!(flags & SCGETC_CN))
2773 	add_keyboard_randomness(scancode);
2774 
2775     if (cur_console->status & KBD_RAW_MODE)
2776 	return scancode;
2777 
2778     keycode = scancode & 0x7F;
2779     switch (esc_flag) {
2780     case 0x00:      /* normal scancode */
2781 	switch(scancode) {
2782 	case 0xB8:  /* left alt (compose key) */
2783 	    if (compose) {
2784 		compose = 0;
2785 		if (chr > 255) {
2786 		    do_bell(cur_console,
2787 			BELL_PITCH, BELL_DURATION);
2788 		    chr = 0;
2789 		}
2790 	    }
2791 	    break;
2792 	case 0x38:
2793 	    if (!compose) {
2794 		compose = 1;
2795 		chr = 0;
2796 	    }
2797 	    break;
2798 	case 0xE0:
2799 	case 0xE1:
2800 	    esc_flag = scancode;
2801 	    goto next_code;
2802 	}
2803 	break;
2804     case 0xE0:      /* 0xE0 prefix */
2805 	esc_flag = 0;
2806 	switch (keycode) {
2807 	case 0x1C:  /* right enter key */
2808 	    keycode = 0x59;
2809 	    break;
2810 	case 0x1D:  /* right ctrl key */
2811 	    keycode = 0x5A;
2812 	    break;
2813 	case 0x35:  /* keypad divide key */
2814 	    keycode = 0x5B;
2815 	    break;
2816 	case 0x37:  /* print scrn key */
2817 	    keycode = 0x5C;
2818 	    break;
2819 	case 0x38:  /* right alt key (alt gr) */
2820 	    keycode = 0x5D;
2821 	    break;
2822 	case 0x47:  /* grey home key */
2823 	    keycode = 0x5E;
2824 	    break;
2825 	case 0x48:  /* grey up arrow key */
2826 	    keycode = 0x5F;
2827 	    break;
2828 	case 0x49:  /* grey page up key */
2829 	    keycode = 0x60;
2830 	    break;
2831 	case 0x4B:  /* grey left arrow key */
2832 	    keycode = 0x61;
2833 	    break;
2834 	case 0x4D:  /* grey right arrow key */
2835 	    keycode = 0x62;
2836 	    break;
2837 	case 0x4F:  /* grey end key */
2838 	    keycode = 0x63;
2839 	    break;
2840 	case 0x50:  /* grey down arrow key */
2841 	    keycode = 0x64;
2842 	    break;
2843 	case 0x51:  /* grey page down key */
2844 	    keycode = 0x65;
2845 	    break;
2846 	case 0x52:  /* grey insert key */
2847 	    keycode = 0x66;
2848 	    break;
2849 	case 0x53:  /* grey delete key */
2850 	    keycode = 0x67;
2851 	    break;
2852 
2853 	/* the following 3 are only used on the MS "Natural" keyboard */
2854 	case 0x5b:  /* left Window key */
2855 	    keycode = 0x69;
2856 	    break;
2857 	case 0x5c:  /* right Window key */
2858 	    keycode = 0x6a;
2859 	    break;
2860 	case 0x5d:  /* menu key */
2861 	    keycode = 0x6b;
2862 	    break;
2863 	default:    /* ignore everything else */
2864 	    goto next_code;
2865 	}
2866 	break;
2867     case 0xE1:      /* 0xE1 prefix */
2868 	esc_flag = 0;
2869 	if (keycode == 0x1D)
2870 	    esc_flag = 0x1D;
2871 	goto next_code;
2872 	/* NOT REACHED */
2873     case 0x1D:      /* pause / break */
2874 	esc_flag = 0;
2875 	if (keycode != 0x45)
2876 	    goto next_code;
2877 	keycode = 0x68;
2878 	break;
2879     }
2880 
2881     /* if scroll-lock pressed allow history browsing */
2882     if (cur_console->history && cur_console->status & SLKED) {
2883 	int i;
2884 
2885 	cur_console->status &= ~CURSOR_ENABLED;
2886 	if (!(cur_console->status & BUFFER_SAVED)) {
2887 	    cur_console->status |= BUFFER_SAVED;
2888 	    cur_console->history_save = cur_console->history_head;
2889 
2890 	    /* copy screen into top of history buffer */
2891 	    for (i=0; i<cur_console->ysize; i++) {
2892 		bcopy(cur_console->scr_buf + (cur_console->xsize * i),
2893 		       cur_console->history_head,
2894 		       cur_console->xsize * sizeof(u_short));
2895 		cur_console->history_head += cur_console->xsize;
2896 		if (cur_console->history_head + cur_console->xsize >
2897 		    cur_console->history + cur_console->history_size)
2898 		    cur_console->history_head=cur_console->history;
2899 	    }
2900 	    cur_console->history_pos = cur_console->history_head;
2901 	    history_to_screen(cur_console);
2902 	}
2903 	switch (scancode) {
2904 	case 0x47:  /* home key */
2905 	    cur_console->history_pos = cur_console->history_head;
2906 	    history_to_screen(cur_console);
2907 	    goto next_code;
2908 
2909 	case 0x4F:  /* end key */
2910 	    cur_console->history_pos =
2911 		WRAPHIST(cur_console, cur_console->history_head,
2912 			 cur_console->xsize*cur_console->ysize);
2913 	    history_to_screen(cur_console);
2914 	    goto next_code;
2915 
2916 	case 0x48:  /* up arrow key */
2917 	    if (history_up_line(cur_console))
2918 		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2919 	    goto next_code;
2920 
2921 	case 0x50:  /* down arrow key */
2922 	    if (history_down_line(cur_console))
2923 		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2924 	    goto next_code;
2925 
2926 	case 0x49:  /* page up key */
2927 	    for (i=0; i<cur_console->ysize; i++)
2928 	    if (history_up_line(cur_console)) {
2929 		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2930 		break;
2931 	    }
2932 	    goto next_code;
2933 
2934 	case 0x51:  /* page down key */
2935 	    for (i=0; i<cur_console->ysize; i++)
2936 	    if (history_down_line(cur_console)) {
2937 		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2938 		break;
2939 	    }
2940 	    goto next_code;
2941 	}
2942     }
2943 
2944     if (compose) {
2945 	switch (scancode) {
2946 	/* key pressed process it */
2947 	case 0x47: case 0x48: case 0x49:    /* keypad 7,8,9 */
2948 	    chr = (scancode - 0x40) + chr*10;
2949 	    goto next_code;
2950 	case 0x4B: case 0x4C: case 0x4D:    /* keypad 4,5,6 */
2951 	    chr = (scancode - 0x47) + chr*10;
2952 	    goto next_code;
2953 	case 0x4F: case 0x50: case 0x51:    /* keypad 1,2,3 */
2954 	    chr = (scancode - 0x4E) + chr*10;
2955 	    goto next_code;
2956 	case 0x52:              /* keypad 0 */
2957 	    chr *= 10;
2958 	    goto next_code;
2959 
2960 	/* key release, no interest here */
2961 	case 0xC7: case 0xC8: case 0xC9:    /* keypad 7,8,9 */
2962 	case 0xCB: case 0xCC: case 0xCD:    /* keypad 4,5,6 */
2963 	case 0xCF: case 0xD0: case 0xD1:    /* keypad 1,2,3 */
2964 	case 0xD2:              /* keypad 0 */
2965 	    goto next_code;
2966 
2967 	case 0x38:              /* left alt key */
2968 	    break;
2969 	default:
2970 	    if (chr) {
2971 		compose = chr = 0;
2972 		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2973 		goto next_code;
2974 	    }
2975 	    break;
2976 	}
2977     }
2978 
2979     state = (shfts ? 1 : 0 ) | (2 * (ctls ? 1 : 0)) | (4 * (alts ? 1 : 0));
2980     if ((!agrs && (cur_console->status & ALKED))
2981 	|| (agrs && !(cur_console->status & ALKED)))
2982 	keycode += ALTGR_OFFSET;
2983     key = &key_map.key[keycode];
2984     if ( ((key->flgs & FLAG_LOCK_C) && (cur_console->status & CLKED))
2985 	 || ((key->flgs & FLAG_LOCK_N) && (cur_console->status & NLKED)) )
2986 	state ^= 1;
2987 
2988     /* Check for make/break */
2989     action = key->map[state];
2990     if (scancode & 0x80) {      /* key released */
2991 	if (key->spcl & 0x80) {
2992 	    switch (action) {
2993 	    case LSH:
2994 		shfts &= ~1;
2995 		break;
2996 	    case RSH:
2997 		shfts &= ~2;
2998 		break;
2999 	    case LCTR:
3000 		ctls &= ~1;
3001 		break;
3002 	    case RCTR:
3003 		ctls &= ~2;
3004 		break;
3005 	    case LALT:
3006 		alts &= ~1;
3007 		break;
3008 	    case RALT:
3009 		alts &= ~2;
3010 		break;
3011 	    case NLK:
3012 		nlkcnt = 0;
3013 		break;
3014 	    case CLK:
3015 		clkcnt = 0;
3016 		break;
3017 	    case SLK:
3018 		slkcnt = 0;
3019 		break;
3020 	    case ASH:
3021 		agrs = 0;
3022 		break;
3023 	    case ALK:
3024 		alkcnt = 0;
3025 		break;
3026 	    case META:
3027 		metas = 0;
3028 		break;
3029 	    }
3030 	}
3031 	if (chr && !compose) {
3032 	    action = chr;
3033 	    chr = 0;
3034 	    return(action);
3035 	}
3036     } else {
3037 	/* key pressed */
3038 	if (key->spcl & (0x80>>state)) {
3039 	    switch (action) {
3040 	    /* LOCKING KEYS */
3041 	    case NLK:
3042 #ifdef SC_SPLASH_SCREEN
3043 		toggle_splash_screen(cur_console); /* SOS XXX */
3044 #endif
3045 		if (!nlkcnt) {
3046 		    nlkcnt++;
3047 		    if (cur_console->status & NLKED)
3048 			cur_console->status &= ~NLKED;
3049 		    else
3050 			cur_console->status |= NLKED;
3051 		    update_leds(cur_console->status);
3052 		}
3053 		break;
3054 	    case CLK:
3055 		if (!clkcnt) {
3056 		    clkcnt++;
3057 		    if (cur_console->status & CLKED)
3058 			cur_console->status &= ~CLKED;
3059 		    else
3060 			cur_console->status |= CLKED;
3061 		    update_leds(cur_console->status);
3062 		}
3063 		break;
3064 	    case SLK:
3065 		if (!slkcnt) {
3066 		    slkcnt++;
3067 		    if (cur_console->status & SLKED) {
3068 			cur_console->status &= ~SLKED;
3069 			if (cur_console->status & BUFFER_SAVED){
3070 			    int i;
3071 			    u_short *ptr = cur_console->history_save;
3072 
3073 			    for (i=0; i<cur_console->ysize; i++) {
3074 				bcopy(ptr,
3075 				       cur_console->scr_buf +
3076 				       (cur_console->xsize*i),
3077 				       cur_console->xsize * sizeof(u_short));
3078 				ptr += cur_console->xsize;
3079 				if (ptr + cur_console->xsize >
3080 				    cur_console->history +
3081 				    cur_console->history_size)
3082 				    ptr = cur_console->history;
3083 			    }
3084 			    cur_console->status &= ~BUFFER_SAVED;
3085 			    cur_console->history_head=cur_console->history_save;
3086 			    cur_console->status |= CURSOR_ENABLED;
3087 			    mark_all(cur_console);
3088 			}
3089 			scstart(VIRTUAL_TTY(get_scr_num()));
3090 		    }
3091 		    else
3092 			cur_console->status |= SLKED;
3093 		    update_leds(cur_console->status);
3094 		}
3095 		break;
3096 	    case ALK:
3097 		if (!alkcnt) {
3098 		    alkcnt++;
3099 		    if (cur_console->status & ALKED)
3100 			cur_console->status &= ~ALKED;
3101 		    else
3102 			cur_console->status |= ALKED;
3103 		    update_leds(cur_console->status);
3104 		}
3105 		break;
3106 
3107 	    /* NON-LOCKING KEYS */
3108 	    case NOP:
3109 		break;
3110 	    case SPSC:
3111 #ifdef SC_SPLASH_SCREEN
3112 		toggle_splash_screen(cur_console);
3113 #endif
3114 		break;
3115 	    case RBT:
3116 		shutdown_nice();
3117 		break;
3118 	    case SUSP:
3119 #if NAPM > 0
3120 		apm_suspend();
3121 #endif
3122 		break;
3123 
3124 	    case DBG:
3125 #ifdef DDB          /* try to switch to console 0 */
3126 		if (cur_console->smode.mode == VT_AUTO &&
3127 		    console[0]->smode.mode == VT_AUTO)
3128 		    switch_scr(cur_console, 0);
3129 		Debugger("manual escape to debugger");
3130 #else
3131 		printf("No debugger in kernel\n");
3132 #endif
3133 		break;
3134 	    case LSH:
3135 		shfts |= 1;
3136 		break;
3137 	    case RSH:
3138 		shfts |= 2;
3139 		break;
3140 	    case LCTR:
3141 		ctls |= 1;
3142 		break;
3143 	    case RCTR:
3144 		ctls |= 2;
3145 		break;
3146 	    case LALT:
3147 		alts |= 1;
3148 		break;
3149 	    case RALT:
3150 		alts |= 2;
3151 		break;
3152 	    case ASH:
3153 		agrs = 1;
3154 		break;
3155 	    case META:
3156 		metas = 1;
3157 		break;
3158 	    case NEXT:
3159 		{
3160 		int next, this = get_scr_num();
3161 		for (next = this+1; next != this; next = (next+1)%MAXCONS) {
3162 		    struct tty *tp = VIRTUAL_TTY(next);
3163 		    if (tp->t_state & TS_ISOPEN) {
3164 			switch_scr(cur_console, next);
3165 			break;
3166 		    }
3167 		}
3168 		}
3169 		break;
3170 	    case BTAB:
3171 		return(BKEY);
3172 	    default:
3173 		if (action >= F_SCR && action <= L_SCR) {
3174 		    switch_scr(cur_console, action - F_SCR);
3175 		    break;
3176 		}
3177 		if (action >= F_FN && action <= L_FN)
3178 		    action |= FKEY;
3179 		return(action);
3180 	    }
3181 	}
3182 	else {
3183 	    if (metas)
3184 		action |= MKEY;
3185 	    return(action);
3186 	}
3187     }
3188     goto next_code;
3189 }
3190 
3191 int
3192 scmmap(dev_t dev, int offset, int nprot)
3193 {
3194     if (offset > 0x20000 - PAGE_SIZE)
3195 	return -1;
3196     return i386_btop((VIDEOMEM + offset));
3197 }
3198 
3199 /*
3200  * Calculate hardware attributes word using logical attributes mask and
3201  * hardware colors
3202  */
3203 
3204 static int
3205 mask2attr(struct term_stat *term)
3206 {
3207     int attr, mask = term->attr_mask;
3208 
3209     if (mask & REVERSE_ATTR) {
3210 	attr = ((mask & FOREGROUND_CHANGED) ?
3211 		((term->cur_color & 0xF000) >> 4) :
3212 		(term->rev_color & 0x0F00)) |
3213 	       ((mask & BACKGROUND_CHANGED) ?
3214 		((term->cur_color & 0x0F00) << 4) :
3215 		(term->rev_color & 0xF000));
3216     } else
3217 	attr = term->cur_color;
3218 
3219     /* XXX: underline mapping for Hercules adapter can be better */
3220     if (mask & (BOLD_ATTR | UNDERLINE_ATTR))
3221 	attr ^= 0x0800;
3222     if (mask & BLINK_ATTR)
3223 	attr ^= 0x8000;
3224 
3225     return attr;
3226 }
3227 
3228 static void
3229 set_keyboard(int command, int data)
3230 {
3231     int s;
3232     int c;
3233 
3234     if (sc_kbdc == NULL)
3235 	return;
3236 
3237     /* prevent the timeout routine from polling the keyboard */
3238     if (!kbdc_lock(sc_kbdc, TRUE))
3239 	return;
3240 
3241     /* disable the keyboard and mouse interrupt */
3242     s = spltty();
3243 #if 0
3244     c = get_controller_command_byte(sc_kbdc);
3245     if ((c == -1)
3246 	|| !set_controller_command_byte(sc_kbdc,
3247             kbdc_get_device_mask(sc_kbdc),
3248             KBD_DISABLE_KBD_PORT | KBD_DISABLE_KBD_INT
3249                 | KBD_DISABLE_AUX_PORT | KBD_DISABLE_AUX_INT)) {
3250 	/* CONTROLLER ERROR */
3251         kbdc_lock(sc_kbdc, FALSE);
3252 	splx(s);
3253 	return;
3254     }
3255     /*
3256      * Now that the keyboard controller is told not to generate
3257      * the keyboard and mouse interrupts, call `splx()' to allow
3258      * the other tty interrupts. The clock interrupt may also occur,
3259      * but the timeout routine (`scrn_timer()') will be blocked
3260      * by the lock flag set via `kbdc_lock()'
3261      */
3262     splx(s);
3263 #endif
3264 
3265     if (send_kbd_command_and_data(sc_kbdc, command, data) != KBD_ACK)
3266         send_kbd_command(sc_kbdc, KBDC_ENABLE_KBD);
3267 
3268 #if 0
3269     /* restore the interrupts */
3270     if (!set_controller_command_byte(sc_kbdc,
3271             kbdc_get_device_mask(sc_kbdc),
3272 	    c & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS))) {
3273 	/* CONTROLLER ERROR */
3274     }
3275 #else
3276     splx(s);
3277 #endif
3278     kbdc_lock(sc_kbdc, FALSE);
3279 }
3280 
3281 static void
3282 update_leds(int which)
3283 {
3284     static u_char xlate_leds[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
3285 
3286     /* replace CAPS led with ALTGR led for ALTGR keyboards */
3287     if (key_map.n_keys > ALTGR_OFFSET) {
3288 	if (which & ALKED)
3289 	    which |= CLKED;
3290 	else
3291 	    which &= ~CLKED;
3292     }
3293 
3294     set_keyboard(KBDC_SET_LEDS, xlate_leds[which & LED_MASK]);
3295 }
3296 
3297 void
3298 set_mode(scr_stat *scp)
3299 {
3300     char *modetable;
3301     char special_modetable[64];
3302 
3303     if (scp != cur_console)
3304 	return;
3305 
3306     /* setup video hardware for the given mode */
3307     switch (scp->mode) {
3308     case M_VGA_M80x60:
3309 	bcopy(video_mode_ptr+(64*M_VGA_M80x25), &special_modetable, 64);
3310 	goto special_80x60;
3311 
3312     case M_VGA_C80x60:
3313 	bcopy(video_mode_ptr+(64*M_VGA_C80x25), &special_modetable, 64);
3314 special_80x60:
3315 	special_modetable[2]  = 0x08;
3316 	special_modetable[19] = 0x47;
3317 	goto special_480l;
3318 
3319     case M_VGA_M80x30:
3320 	bcopy(video_mode_ptr+(64*M_VGA_M80x25), &special_modetable, 64);
3321 	goto special_80x30;
3322 
3323     case M_VGA_C80x30:
3324 	bcopy(video_mode_ptr+(64*M_VGA_C80x25), &special_modetable, 64);
3325 special_80x30:
3326 	special_modetable[19] = 0x4f;
3327 special_480l:
3328 	special_modetable[9] |= 0xc0;
3329 	special_modetable[16] = 0x08;
3330 	special_modetable[17] = 0x3e;
3331 	special_modetable[26] = 0xea;
3332 	special_modetable[28] = 0xdf;
3333 	special_modetable[31] = 0xe7;
3334 	special_modetable[32] = 0x04;
3335 	modetable = special_modetable;
3336 	goto setup_mode;
3337 
3338     case M_ENH_B80x43:
3339 	bcopy(video_mode_ptr+(64*M_ENH_B80x25), &special_modetable, 64);
3340 	goto special_80x43;
3341 
3342     case M_ENH_C80x43:
3343 	bcopy(video_mode_ptr+(64*M_ENH_C80x25), &special_modetable, 64);
3344 special_80x43:
3345 	special_modetable[28] = 87;
3346 	goto special_80x50;
3347 
3348     case M_VGA_M80x50:
3349 	bcopy(video_mode_ptr+(64*M_VGA_M80x25), &special_modetable, 64);
3350 	goto special_80x50;
3351 
3352     case M_VGA_C80x50:
3353 	bcopy(video_mode_ptr+(64*M_VGA_C80x25), &special_modetable, 64);
3354 special_80x50:
3355 	special_modetable[2] = 8;
3356 	special_modetable[19] = 7;
3357 	modetable = special_modetable;
3358 	goto setup_mode;
3359 
3360     case M_VGA_C40x25: case M_VGA_C80x25:
3361     case M_VGA_M80x25:
3362     case M_B40x25:     case M_C40x25:
3363     case M_B80x25:     case M_C80x25:
3364     case M_ENH_B40x25: case M_ENH_C40x25:
3365     case M_ENH_B80x25: case M_ENH_C80x25:
3366     case M_EGAMONO80x25:
3367 
3368 	modetable = video_mode_ptr + (scp->mode * 64);
3369 setup_mode:
3370 	set_vgaregs(modetable);
3371 	scp->font_size = *(modetable + 2);
3372 
3373 	/* set font type (size) */
3374 	if (scp->font_size < 14) {
3375 	    if (fonts_loaded & FONT_8)
3376 		copy_font(LOAD, FONT_8, font_8);
3377 	    outb(TSIDX, 0x03); outb(TSREG, 0x0A);   /* font 2 */
3378 	} else if (scp->font_size >= 16) {
3379 	    if (fonts_loaded & FONT_16)
3380 		copy_font(LOAD, FONT_16, font_16);
3381 	    outb(TSIDX, 0x03); outb(TSREG, 0x00);   /* font 0 */
3382 	} else {
3383 	    if (fonts_loaded & FONT_14)
3384 		copy_font(LOAD, FONT_14, font_14);
3385 	    outb(TSIDX, 0x03); outb(TSREG, 0x05);   /* font 1 */
3386 	}
3387 	if (flags & CHAR_CURSOR)
3388 	    set_destructive_cursor(scp);
3389 	mark_all(scp);
3390 	break;
3391 
3392     case M_BG320:     case M_CG320:     case M_BG640:
3393     case M_CG320_D:   case M_CG640_E:
3394     case M_CG640x350: case M_ENH_CG640:
3395     case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
3396 
3397 	set_vgaregs(video_mode_ptr + (scp->mode * 64));
3398 	scp->font_size = FONT_NONE;
3399 	break;
3400 
3401     default:
3402 	/* call user defined function XXX */
3403 	break;
3404     }
3405 
3406     /* set border color for this (virtual) console */
3407     set_border(scp->border);
3408     return;
3409 }
3410 
3411 void
3412 set_border(u_char color)
3413 {
3414     inb(crtc_addr+6);               /* reset flip-flop */
3415     outb(ATC, 0x11); outb(ATC, color);
3416     inb(crtc_addr+6);               /* reset flip-flop */
3417     outb(ATC, 0x20);                /* enable Palette */
3418 }
3419 
3420 static void
3421 set_vgaregs(char *modetable)
3422 {
3423     int i, s = splhigh();
3424 
3425     outb(TSIDX, 0x00); outb(TSREG, 0x01);   	/* stop sequencer */
3426     outb(TSIDX, 0x07); outb(TSREG, 0x00);   	/* unlock registers */
3427     for (i=0; i<4; i++) {           		/* program sequencer */
3428 	outb(TSIDX, i+1);
3429 	outb(TSREG, modetable[i+5]);
3430     }
3431     outb(MISC, modetable[9]);       		/* set dot-clock */
3432     outb(TSIDX, 0x00); outb(TSREG, 0x03);   	/* start sequencer */
3433     outb(crtc_addr, 0x11);
3434     outb(crtc_addr+1, inb(crtc_addr+1) & 0x7F);
3435     for (i=0; i<25; i++) {          		/* program crtc */
3436 	outb(crtc_addr, i);
3437 	if (i == 14 || i == 15)     		/* no hardware cursor */
3438 	    outb(crtc_addr+1, 0xff);
3439 	else
3440 	    outb(crtc_addr+1, modetable[i+10]);
3441     }
3442     inb(crtc_addr+6);           		/* reset flip-flop */
3443     for (i=0; i<20; i++) {          		/* program attribute ctrl */
3444 	outb(ATC, i);
3445 	outb(ATC, modetable[i+35]);
3446     }
3447     for (i=0; i<9; i++) {           		/* program graph data ctrl */
3448 	outb(GDCIDX, i);
3449 	outb(GDCREG, modetable[i+55]);
3450     }
3451     inb(crtc_addr+6);           		/* reset flip-flop */
3452     outb(ATC, 0x20);            		/* enable palette */
3453     splx(s);
3454 }
3455 
3456 static void
3457 read_vgaregs(char *buf)
3458 {
3459     int i, j;
3460     int s;
3461 
3462     bzero(buf, 64);
3463 
3464     s = splhigh();
3465 
3466     outb(TSIDX, 0x00); outb(TSREG, 0x01);   	/* stop sequencer */
3467     outb(TSIDX, 0x07); outb(TSREG, 0x00);   	/* unlock registers */
3468     for (i=0, j=5; i<4; i++) {
3469 	outb(TSIDX, i+1);
3470 	buf[j++] = inb(TSREG);
3471     }
3472     buf[9] = inb(MISC + 10);      		/* dot-clock */
3473     outb(TSIDX, 0x00); outb(TSREG, 0x03);   	/* start sequencer */
3474 
3475     for (i=0, j=10; i<25; i++) {       		/* crtc */
3476 	outb(crtc_addr, i);
3477 	buf[j++] = inb(crtc_addr+1);
3478     }
3479     for (i=0, j=35; i<20; i++) {          	/* attribute ctrl */
3480         inb(crtc_addr+6);           		/* reset flip-flop */
3481 	outb(ATC, i);
3482 	buf[j++] = inb(ATC + 1);
3483     }
3484     for (i=0, j=55; i<9; i++) {           	/* graph data ctrl */
3485 	outb(GDCIDX, i);
3486 	buf[j++] = inb(GDCREG);
3487     }
3488     inb(crtc_addr+6);           		/* reset flip-flop */
3489     outb(ATC, 0x20);            		/* enable palette */
3490 
3491     buf[0] = *(char *)pa_to_va(0x44a);		/* COLS */
3492     buf[1] = *(char *)pa_to_va(0x484);		/* ROWS */
3493     buf[2] = *(char *)pa_to_va(0x485);		/* POINTS */
3494     buf[3] = *(char *)pa_to_va(0x44c);
3495     buf[4] = *(char *)pa_to_va(0x44d);
3496 
3497     splx(s);
3498 }
3499 
3500 static int
3501 comp_vgaregs(u_char *buf1, u_char *buf2)
3502 {
3503     int i;
3504 
3505     for(i = 0; i < 20; ++i) {
3506 	if (*buf1++ != *buf2++)
3507 	    return 1;
3508     }
3509     buf1 += 2;  /* skip the cursor shape */
3510     buf2 += 2;
3511     for(i = 22; i < 24; ++i) {
3512 	if (*buf1++ != *buf2++)
3513 	    return 1;
3514     }
3515     buf1 += 2;  /* skip the cursor position */
3516     buf2 += 2;
3517     for(i = 26; i < 64; ++i) {
3518 	if (*buf1++ != *buf2++)
3519 	    return 1;
3520     }
3521     return 0;
3522 }
3523 
3524 static void
3525 dump_vgaregs(u_char *buf)
3526 {
3527     int i;
3528 
3529     for(i = 0; i < 64;) {
3530 	printf("%02x ", buf[i]);
3531 	if ((++i % 16) == 0)
3532 	    printf("\n");
3533     }
3534 }
3535 
3536 static void
3537 set_font_mode()
3538 {
3539     int s = splhigh();
3540 
3541     /* setup vga for loading fonts (graphics plane mode) */
3542     inb(crtc_addr+6);           		/* reset flip-flop */
3543     outb(ATC, 0x10); outb(ATC, 0x01);
3544     inb(crtc_addr+6);               		/* reset flip-flop */
3545     outb(ATC, 0x20);            		/* enable palette */
3546 
3547 #if SLOW_VGA
3548     outb(TSIDX, 0x02); outb(TSREG, 0x04);
3549     outb(TSIDX, 0x04); outb(TSREG, 0x06);
3550     outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
3551     outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
3552     outb(GDCIDX, 0x06); outb(GDCREG, 0x05);
3553 #else
3554     outw(TSIDX, 0x0402);
3555     outw(TSIDX, 0x0604);
3556     outw(GDCIDX, 0x0204);
3557     outw(GDCIDX, 0x0005);
3558     outw(GDCIDX, 0x0506);               /* addr = a0000, 64kb */
3559 #endif
3560     splx(s);
3561 }
3562 
3563 static void
3564 set_normal_mode()
3565 {
3566     char *modetable;
3567     int s = splhigh();
3568 
3569     switch (cur_console->mode) {
3570     case M_VGA_M80x60:
3571     case M_VGA_M80x50:
3572     case M_VGA_M80x30:
3573 	modetable = video_mode_ptr + (64*M_VGA_M80x25);
3574 	break;
3575 
3576     case M_VGA_C80x60:
3577     case M_VGA_C80x50:
3578     case M_VGA_C80x30:
3579 	modetable = video_mode_ptr + (64*M_VGA_C80x25);
3580 	break;
3581 
3582     case M_ENH_B80x43:
3583 	modetable = video_mode_ptr + (64*M_ENH_B80x25);
3584 	break;
3585 
3586     case M_ENH_C80x43:
3587 	modetable = video_mode_ptr + (64*M_ENH_C80x25);
3588 	break;
3589 
3590     case M_VGA_C40x25: case M_VGA_C80x25:
3591     case M_VGA_M80x25:
3592     case M_B40x25:     case M_C40x25:
3593     case M_B80x25:     case M_C80x25:
3594     case M_ENH_B40x25: case M_ENH_C40x25:
3595     case M_ENH_B80x25: case M_ENH_C80x25:
3596     case M_EGAMONO80x25:
3597 
3598     case M_BG320:     case M_CG320:     case M_BG640:
3599     case M_CG320_D:   case M_CG640_E:
3600     case M_CG640x350: case M_ENH_CG640:
3601     case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
3602 	modetable = video_mode_ptr + (cur_console->mode * 64);
3603 	break;
3604 
3605     default:
3606 	modetable = video_mode_ptr + (64*M_VGA_C80x25);
3607     }
3608 
3609     if (video_mode_ptr == NULL)
3610 	modetable = vgaregs;
3611 
3612     /* setup vga for normal operation mode again */
3613     inb(crtc_addr+6);           		/* reset flip-flop */
3614     outb(ATC, 0x10); outb(ATC, modetable[0x10+35]);
3615     inb(crtc_addr+6);               		/* reset flip-flop */
3616     outb(ATC, 0x20);            		/* enable palette */
3617 #if SLOW_VGA
3618     outb(TSIDX, 0x02); outb(TSREG, modetable[0x02+4]);
3619     outb(TSIDX, 0x04); outb(TSREG, modetable[0x04+4]);
3620     outb(GDCIDX, 0x04); outb(GDCREG, modetable[0x04+55]);
3621     outb(GDCIDX, 0x05); outb(GDCREG, modetable[0x05+55]);
3622     outb(GDCIDX, 0x06); outb(GDCREG, modetable[0x06+55]);
3623     if (crtc_addr == MONO_BASE) {
3624 	outb(GDCIDX, 0x06); outb(GDCREG,(modetable[0x06+55] & 0x03) | 0x08);
3625     }
3626     else {
3627 	outb(GDCIDX, 0x06); outb(GDCREG,(modetable[0x06+55] & 0x03) | 0x0c);
3628     }
3629 #else
3630     outw(TSIDX, 0x0002 | (modetable[0x02+4]<<8));
3631     outw(TSIDX, 0x0004 | (modetable[0x04+4]<<8));
3632     outw(GDCIDX, 0x0004 | (modetable[0x04+55]<<8));
3633     outw(GDCIDX, 0x0005 | (modetable[0x05+55]<<8));
3634     if (crtc_addr == MONO_BASE)
3635         outw(GDCIDX, 0x0006 | (((modetable[0x06+55] & 0x03) | 0x08)<<8));
3636     else
3637         outw(GDCIDX, 0x0006 | (((modetable[0x06+55] & 0x03) | 0x0c)<<8));
3638 #endif
3639     splx(s);
3640 }
3641 
3642 void
3643 copy_font(int operation, int font_type, char* font_image)
3644 {
3645     int ch, line, segment, fontsize;
3646     u_char val;
3647 
3648     /* dont mess with console we dont know video mode on */
3649     if (cur_console->status & UNKNOWN_MODE)
3650 	return;
3651 
3652     switch (font_type) {
3653     default:
3654     case FONT_8:
3655 	segment = 0x8000;
3656 	fontsize = 8;
3657 	break;
3658     case FONT_14:
3659 	segment = 0x4000;
3660 	fontsize = 14;
3661 	break;
3662     case FONT_16:
3663 	segment = 0x0000;
3664 	fontsize = 16;
3665 	break;
3666     }
3667     outb(TSIDX, 0x01); val = inb(TSREG);        /* disable screen */
3668     outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
3669     set_font_mode();
3670     for (ch=0; ch < 256; ch++)
3671 	for (line=0; line < fontsize; line++)
3672 	if (operation)
3673 	    *(char *)pa_to_va(VIDEOMEM+(segment)+(ch*32)+line) =
3674 		    font_image[(ch*fontsize)+line];
3675 	else
3676 	    font_image[(ch*fontsize)+line] =
3677 	    *(char *)pa_to_va(VIDEOMEM+(segment)+(ch*32)+line);
3678     set_normal_mode();
3679     outb(TSIDX, 0x01); outb(TSREG, val & 0xDF); /* enable screen */
3680 }
3681 
3682 static void
3683 set_destructive_cursor(scr_stat *scp)
3684 {
3685     u_char cursor[32];
3686     caddr_t address;
3687     int i;
3688     char *font_buffer;
3689 
3690 
3691     if (scp->font_size < 14) {
3692 	font_buffer = font_8;
3693 	address = (caddr_t)VIDEOMEM + 0x8000;
3694     }
3695     else if (scp->font_size >= 16) {
3696 	font_buffer = font_16;
3697 	address = (caddr_t)VIDEOMEM;
3698     }
3699     else {
3700 	font_buffer = font_14;
3701 	address = (caddr_t)VIDEOMEM + 0x4000;
3702     }
3703 
3704     if (scp->status & MOUSE_VISIBLE) {
3705 	if ((scp->cursor_saveunder & 0xff) == 0xd0)
3706     	    bcopy(&scp->mouse_cursor[0], cursor, scp->font_size);
3707 	else if ((scp->cursor_saveunder & 0xff) == 0xd1)
3708     	    bcopy(&scp->mouse_cursor[32], cursor, scp->font_size);
3709 	else if ((scp->cursor_saveunder & 0xff) == 0xd2)
3710     	    bcopy(&scp->mouse_cursor[64], cursor, scp->font_size);
3711 	else if ((scp->cursor_saveunder & 0xff) == 0xd3)
3712     	    bcopy(&scp->mouse_cursor[96], cursor, scp->font_size);
3713 	else
3714 	    bcopy(font_buffer+((scp->cursor_saveunder & 0xff)*scp->font_size),
3715  	       	   cursor, scp->font_size);
3716     }
3717     else
3718     	bcopy(font_buffer + ((scp->cursor_saveunder & 0xff) * scp->font_size),
3719  	       cursor, scp->font_size);
3720     for (i=0; i<32; i++)
3721 	if ((i >= scp->cursor_start && i <= scp->cursor_end) ||
3722 	    (scp->cursor_start >= scp->font_size && i == scp->font_size - 1))
3723 	    cursor[i] |= 0xff;
3724 #if 1
3725     while (!(inb(crtc_addr+6) & 0x08)) /* wait for vertical retrace */ ;
3726 #endif
3727     set_font_mode();
3728     sc_bcopy(cursor, (char *)pa_to_va(address) + DEAD_CHAR * 32, 32);
3729     set_normal_mode();
3730 }
3731 
3732 static void
3733 set_mouse_pos(scr_stat *scp)
3734 {
3735     static int last_xpos = -1, last_ypos = -1;
3736     /*
3737      * the margins imposed here are not ideal, we loose
3738      * a couble of pixels on the borders..
3739      */
3740     if (scp->mouse_xpos < 0)
3741 	scp->mouse_xpos = 0;
3742     if (scp->mouse_ypos < 0)
3743 	scp->mouse_ypos = 0;
3744     if (scp->mouse_xpos > (scp->xsize*8)-2)
3745 	scp->mouse_xpos = (scp->xsize*8)-2;
3746     if (scp->mouse_ypos > (scp->ysize*scp->font_size)-2)
3747 	scp->mouse_ypos = (scp->ysize*scp->font_size)-2;
3748 
3749     if (scp->status & UNKNOWN_MODE)
3750 	return;
3751 
3752     if (scp->mouse_xpos != last_xpos || scp->mouse_ypos != last_ypos) {
3753 	scp->status |= MOUSE_MOVED;
3754 
3755     	scp->mouse_pos = scp->scr_buf +
3756 	    ((scp->mouse_ypos/scp->font_size)*scp->xsize + scp->mouse_xpos/8);
3757 
3758 	if ((scp->status & MOUSE_VISIBLE) && (scp->status & MOUSE_CUTTING)) {
3759 	    u_short *ptr;
3760 	    int i = 0;
3761 
3762 	    mark_for_update(scp, scp->mouse_cut_start - scp->scr_buf);
3763 	    mark_for_update(scp, scp->mouse_cut_end - scp->scr_buf);
3764 	    scp->mouse_cut_end = scp->mouse_pos;
3765 	    for (ptr = (scp->mouse_cut_start > scp->mouse_cut_end
3766 			? scp->mouse_cut_end : scp->mouse_cut_start);
3767 		 ptr <= (scp->mouse_cut_start > scp->mouse_cut_end
3768 			 ? scp->mouse_cut_start : scp->mouse_cut_end);
3769 	    	 ptr++) {
3770 	        cut_buffer[i++] = *ptr & 0xff;
3771 	        if (((ptr - scp->scr_buf) % scp->xsize) == (scp->xsize - 1)) {
3772 		    cut_buffer[i++] = '\n';
3773 	        }
3774 	    }
3775 	    cut_buffer[i] = 0x00;
3776         }
3777     }
3778 }
3779 
3780 static void
3781 mouse_cut_start(scr_stat *scp)
3782 {
3783     int i;
3784 
3785     if (scp->status & MOUSE_VISIBLE) {
3786 	if (scp->mouse_pos == scp->mouse_cut_start &&
3787 	    scp->mouse_cut_start == scp->mouse_cut_end) {
3788 	    cut_buffer[0] = 0x00;
3789 	    remove_cutmarking(scp);
3790 	}
3791 	else {
3792 	    scp->mouse_cut_start = scp->mouse_cut_end = scp->mouse_pos;
3793 	    cut_buffer[0] = *scp->mouse_cut_start & 0xff;
3794 	    cut_buffer[1] = 0x00;
3795 	    scp->status |= MOUSE_CUTTING;
3796 	}
3797     	mark_all(scp);
3798 	/* delete all other screens cut markings */
3799 	for (i=0; i<MAXCONS; i++) {
3800 	    if (console[i] == NULL || console[i] == scp)
3801 		continue;
3802 	    remove_cutmarking(console[i]);
3803 	}
3804     }
3805 }
3806 
3807 static void
3808 mouse_cut_end(scr_stat *scp)
3809 {
3810     if (scp->status & MOUSE_VISIBLE) {
3811 	scp->status &= ~MOUSE_CUTTING;
3812     }
3813 }
3814 
3815 static void
3816 mouse_paste(scr_stat *scp)
3817 {
3818     if (scp->status & MOUSE_VISIBLE) {
3819 	struct tty *tp;
3820 	u_char *ptr = cut_buffer;
3821 
3822 	tp = VIRTUAL_TTY(get_scr_num());
3823 	while (*ptr)
3824 	    (*linesw[tp->t_line].l_rint)(scr_rmap[*ptr++], tp);
3825     }
3826 }
3827 
3828 static void
3829 draw_mouse_image(scr_stat *scp)
3830 {
3831     caddr_t address;
3832     int i;
3833     char *font_buffer;
3834     u_short buffer[32];
3835     u_short xoffset, yoffset;
3836     u_short *crt_pos = Crtat + (scp->mouse_pos - scp->scr_buf);
3837     int font_size = scp->font_size;
3838 
3839     if (font_size < 14) {
3840 	font_buffer = font_8;
3841 	address = (caddr_t)VIDEOMEM + 0x8000;
3842     }
3843     else if (font_size >= 16) {
3844 	font_buffer = font_16;
3845 	address = (caddr_t)VIDEOMEM;
3846     }
3847     else {
3848 	font_buffer = font_14;
3849 	address = (caddr_t)VIDEOMEM + 0x4000;
3850     }
3851     xoffset = scp->mouse_xpos % 8;
3852     yoffset = scp->mouse_ypos % font_size;
3853 
3854     /* prepare mousepointer char's bitmaps */
3855     bcopy(font_buffer + ((*(scp->mouse_pos) & 0xff) * font_size),
3856 	   &scp->mouse_cursor[0], font_size);
3857     bcopy(font_buffer + ((*(scp->mouse_pos+1) & 0xff) * font_size),
3858 	   &scp->mouse_cursor[32], font_size);
3859     bcopy(font_buffer + ((*(scp->mouse_pos+scp->xsize) & 0xff) * font_size),
3860 	   &scp->mouse_cursor[64], font_size);
3861     bcopy(font_buffer + ((*(scp->mouse_pos+scp->xsize+1) & 0xff) * font_size),
3862 	   &scp->mouse_cursor[96], font_size);
3863     for (i=0; i<font_size; i++) {
3864 	buffer[i] = scp->mouse_cursor[i]<<8 | scp->mouse_cursor[i+32];
3865 	buffer[i+font_size]=scp->mouse_cursor[i+64]<<8|scp->mouse_cursor[i+96];
3866     }
3867 
3868     /* now and-or in the mousepointer image */
3869     for (i=0; i<16; i++) {
3870 	buffer[i+yoffset] =
3871 	    ( buffer[i+yoffset] & ~(mouse_and_mask[i] >> xoffset))
3872 	    | (mouse_or_mask[i] >> xoffset);
3873     }
3874     for (i=0; i<font_size; i++) {
3875 	scp->mouse_cursor[i] = (buffer[i] & 0xff00) >> 8;
3876 	scp->mouse_cursor[i+32] = buffer[i] & 0xff;
3877 	scp->mouse_cursor[i+64] = (buffer[i+font_size] & 0xff00) >> 8;
3878 	scp->mouse_cursor[i+96] = buffer[i+font_size] & 0xff;
3879     }
3880 
3881     scp->mouse_oldpos = scp->mouse_pos;
3882 
3883     /* wait for vertical retrace to avoid jitter on some videocards */
3884 #if 1
3885     while (!(inb(crtc_addr+6) & 0x08)) /* idle */ ;
3886 #endif
3887     set_font_mode();
3888     sc_bcopy(scp->mouse_cursor, (char *)pa_to_va(address) + 0xd0 * 32, 128);
3889     set_normal_mode();
3890     *(crt_pos) = (*(scp->mouse_pos)&0xff00)|0xd0;
3891     *(crt_pos+scp->xsize) = (*(scp->mouse_pos+scp->xsize)&0xff00)|0xd2;
3892     if (scp->mouse_xpos < (scp->xsize-1)*8) {
3893     	*(crt_pos+1) = (*(scp->mouse_pos+1)&0xff00)|0xd1;
3894     	*(crt_pos+scp->xsize+1) = (*(scp->mouse_pos+scp->xsize+1)&0xff00)|0xd3;
3895     }
3896     mark_for_update(scp, scp->mouse_pos - scp->scr_buf);
3897     mark_for_update(scp, scp->mouse_pos + scp->xsize + 1 - scp->scr_buf);
3898 }
3899 
3900 static void
3901 remove_mouse_image(scr_stat *scp)
3902 {
3903     u_short *crt_pos = Crtat + (scp->mouse_oldpos - scp->scr_buf);
3904 
3905     *(crt_pos) = *(scp->mouse_oldpos);
3906     *(crt_pos+1) = *(scp->mouse_oldpos+1);
3907     *(crt_pos+scp->xsize) = *(scp->mouse_oldpos+scp->xsize);
3908     *(crt_pos+scp->xsize+1) = *(scp->mouse_oldpos+scp->xsize+1);
3909     mark_for_update(scp, scp->mouse_oldpos - scp->scr_buf);
3910     mark_for_update(scp, scp->mouse_oldpos + scp->xsize + 1 - scp->scr_buf);
3911 }
3912 
3913 static void
3914 draw_cutmarking(scr_stat *scp)
3915 {
3916     u_short *ptr;
3917     u_short och, nch;
3918 
3919     for (ptr=scp->scr_buf; ptr<=(scp->scr_buf+(scp->xsize*scp->ysize)); ptr++) {
3920 	nch = och = *(Crtat + (ptr - scp->scr_buf));
3921 	/* are we outside the selected area ? */
3922 	if ( ptr < (scp->mouse_cut_start > scp->mouse_cut_end ?
3923 	            scp->mouse_cut_end : scp->mouse_cut_start) ||
3924 	     ptr > (scp->mouse_cut_start > scp->mouse_cut_end ?
3925 	            scp->mouse_cut_start : scp->mouse_cut_end)) {
3926 	    if (ptr != scp->cursor_pos)
3927 		nch = (och & 0xff) | (*ptr & 0xff00);
3928 	}
3929 	else {
3930 	    /* are we clear of the cursor image ? */
3931 	    if (ptr != scp->cursor_pos)
3932 		nch = (och & 0x88ff) | (*ptr & 0x7000)>>4 | (*ptr & 0x0700)<<4;
3933 	    else {
3934 		if (flags & CHAR_CURSOR)
3935 		    nch = (och & 0x88ff)|(*ptr & 0x7000)>>4|(*ptr & 0x0700)<<4;
3936 		else
3937 		    if (!(flags & BLINK_CURSOR))
3938 		        nch = (och & 0xff) | (*ptr & 0xff00);
3939 	    }
3940 	}
3941 	if (nch != och)
3942 	    *(Crtat + (ptr - scp->scr_buf)) = nch;
3943     }
3944 }
3945 
3946 static void
3947 remove_cutmarking(scr_stat *scp)
3948 {
3949     scp->mouse_cut_start = scp->mouse_cut_end = NULL;
3950     scp->status &= ~MOUSE_CUTTING;
3951     mark_all(scp);
3952 }
3953 
3954 static void
3955 save_palette(void)
3956 {
3957     int i;
3958 
3959     outb(PALRADR, 0x00);
3960     for (i=0x00; i<0x300; i++)
3961 	palette[i] = inb(PALDATA);
3962     inb(crtc_addr+6);           /* reset flip/flop */
3963 }
3964 
3965 void
3966 load_palette(char *palette)
3967 {
3968     int i;
3969 
3970     outb(PIXMASK, 0xFF);            /* no pixelmask */
3971     outb(PALWADR, 0x00);
3972     for (i=0x00; i<0x300; i++)
3973 	 outb(PALDATA, palette[i]);
3974     inb(crtc_addr+6);           /* reset flip/flop */
3975     outb(ATC, 0x20);            /* enable palette */
3976 }
3977 
3978 static void
3979 do_bell(scr_stat *scp, int pitch, int duration)
3980 {
3981     if (flags & VISUAL_BELL) {
3982 	if (blink_in_progress)
3983 	    return;
3984 	blink_in_progress = 4;
3985 	if (scp != cur_console)
3986 	    blink_in_progress += 2;
3987 	blink_screen(cur_console);
3988     } else {
3989 	if (scp != cur_console)
3990 	    pitch *= 2;
3991 	sysbeep(pitch, duration);
3992     }
3993 }
3994 
3995 static void
3996 blink_screen(void *arg)
3997 {
3998     scr_stat *scp = arg;
3999 
4000     if ((scp->status & UNKNOWN_MODE) || (blink_in_progress <= 1)) {
4001 	blink_in_progress = FALSE;
4002     	mark_all(scp);
4003 	if (delayed_next_scr)
4004 	    switch_scr(scp, delayed_next_scr - 1);
4005     }
4006     else {
4007 	if (blink_in_progress & 1)
4008 	    fillw(kernel_default.std_color | scr_map[0x20],
4009 		  Crtat, scp->xsize * scp->ysize);
4010 	else
4011 	    fillw(kernel_default.rev_color | scr_map[0x20],
4012 		  Crtat, scp->xsize * scp->ysize);
4013 	blink_in_progress--;
4014 	timeout(blink_screen, scp, hz / 10);
4015     }
4016 }
4017 
4018 #ifdef SC_SPLASH_SCREEN
4019 static void
4020 toggle_splash_screen(scr_stat *scp)
4021 {
4022     static int toggle = 0;
4023     static u_char save_mode;
4024     int s;
4025 
4026     if (video_mode_ptr == NULL)
4027 	return;
4028 
4029     s = splhigh();
4030     if (toggle) {
4031 	scp->mode = save_mode;
4032 	scp->status &= ~UNKNOWN_MODE;
4033 	set_mode(scp);
4034 	load_palette(palette);
4035 	toggle = 0;
4036     }
4037     else {
4038 	save_mode = scp->mode;
4039 	scp->mode = M_VGA_CG320;
4040 	scp->status |= UNKNOWN_MODE;
4041 	set_mode(scp);
4042 	/* load image */
4043 	toggle = 1;
4044     }
4045     splx(s);
4046 }
4047 #endif
4048 #endif /* NSC */
4049