syscons.c revision 10082
156067Smarkm/*-
256067Smarkm * Copyright (c) 1992-1995 S�ren Schmidt
3114464Smarkm * All rights reserved.
4103962Smarkm *
556067Smarkm * Redistribution and use in source and binary forms, with or without
656067Smarkm * modification, are permitted provided that the following conditions
756067Smarkm * are met:
856067Smarkm * 1. Redistributions of source code must retain the above copyright
956067Smarkm *    notice, this list of conditions and the following disclaimer
1081104Smarkm *    in this position and unchanged.
1156067Smarkm * 2. Redistributions in binary form must reproduce the above copyright
12112049Smarkm *    notice, this list of conditions and the following disclaimer in the
1356549Smarkm *    documentation and/or other materials provided with the distribution.
1456549Smarkm * 3. The name of the author may not be used to endorse or promote products
1556549Smarkm *    derived from this software withough specific prior written permission
16116536Smr *
17116517Smr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18116517Smr * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19116517Smr * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20116517Smr * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21116517Smr * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22116517Smr * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
2356067Smarkm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
2456067Smarkm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
2556067Smarkm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
2656067Smarkm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2756067Smarkm *
2856067Smarkm *  $Id: syscons.c,v 1.123 1995/08/08 05:14:40 dyson Exp $
2956067Smarkm */
3056067Smarkm
3156067Smarkm#include "sc.h"
3256067Smarkm#include "apm.h"
3356067Smarkm#if NSC > 0
3456067Smarkm#include <sys/param.h>
3556067Smarkm#include <sys/systm.h>
3656067Smarkm#include <sys/conf.h>
3756067Smarkm#include <sys/ioctl.h>
3856067Smarkm#include <sys/proc.h>
3956067Smarkm#include <sys/user.h>
4056067Smarkm#include <sys/tty.h>
4156067Smarkm#include <sys/uio.h>
4256067Smarkm#include <sys/callout.h>
4356067Smarkm#include <sys/kernel.h>
4456067Smarkm#include <sys/syslog.h>
4556067Smarkm#include <sys/errno.h>
4656067Smarkm#include <sys/malloc.h>
4772450Sassar#include <sys/devconf.h>
48117182Sru
4972450Sassar#include <machine/clock.h>
50117182Sru#include <machine/console.h>
5172450Sassar#include <machine/psl.h>
5272450Sassar#include <machine/frame.h>
5356067Smarkm#include <machine/pc/display.h>
5456067Smarkm#include <machine/apm_bios.h>
5556067Smarkm
5656067Smarkm#include <i386/isa/isa.h>
5756067Smarkm#include <i386/isa/isa_device.h>
5856067Smarkm#include <i386/isa/timerreg.h>
5956067Smarkm#include <i386/isa/kbdtables.h>
60117182Sru#include <i386/i386/cons.h>
6156067Smarkm#include <i386/isa/syscons.h>
62117182Sru
6356067Smarkm#if !defined(MAXCONS)
6456067Smarkm#define MAXCONS 16
6581104Smarkm#endif
6681104Smarkm
6781104Smarkm/* this may break on older VGA's but is usefull on real 32 bit systems */
6881104Smarkm#define bcopyw  bcopy
6981104Smarkm
7081104Smarkmstatic default_attr user_default = {
7156067Smarkm    (FG_LIGHTGREY | BG_BLACK) << 8,
7256067Smarkm    (FG_BLACK | BG_LIGHTGREY) << 8
7356067Smarkm};
7456067Smarkm
7556067Smarkmstatic default_attr kernel_default = {
7656067Smarkm    (FG_WHITE | BG_BLACK) << 8,
7756067Smarkm    (FG_BLACK | BG_LIGHTGREY) << 8
7856067Smarkm};
7956067Smarkm
8056067Smarkmstatic  scr_stat    	main_console;
8156067Smarkmstatic  scr_stat    	*console[MAXCONS];
8256067Smarkm	scr_stat    	*cur_console;
8356067Smarkmstatic  scr_stat    	*new_scp, *old_scp;
8456067Smarkmstatic  term_stat   	kernel_console;
8556067Smarkmstatic  default_attr    *current_default;
8656067Smarkmstatic  char        	init_done = FALSE;
8756067Smarkmstatic  int     	configuration = 0;
8856067Smarkmstatic  char        	switch_in_progress = FALSE;
8956067Smarkmstatic  char        	blink_in_progress = FALSE;
9056067Smarkmstatic  char        	write_in_progress = FALSE;
9156067Smarkm	u_int       	crtc_addr = MONO_BASE;
9256067Smarkmstatic  char        	crtc_vga = FALSE;
9356067Smarkmstatic  u_char      	shfts = 0, ctls = 0, alts = 0, agrs = 0, metas = 0;
9456067Smarkmstatic  u_char      	nlkcnt = 0, clkcnt = 0, slkcnt = 0, alkcnt = 0;
9556067Smarkmstatic  char        	*font_8 = NULL, *font_14 = NULL, *font_16 = NULL;
9656067Smarkmstatic  int     	fonts_loaded = 0;
9756067Smarkm	char        	palette[3*256];
9856067Smarkmstatic  const u_int     n_fkey_tab = sizeof(fkey_tab) / sizeof(*fkey_tab);
9956067Smarkmstatic  int     	delayed_next_scr = FALSE;
10056067Smarkmstatic  long        	scrn_blank_time = 0;    /* screen saver timeout value */
10156067Smarkm	int     	scrn_blanked = FALSE;   /* screen saver active flag */
10256067Smarkmstatic  int     	scrn_saver = 0;    	/* screen saver routine */
10356067Smarkmstatic  long       	scrn_time_stamp;
10456067Smarkm	u_char      	scr_map[256];
10556067Smarkmstatic  char        	*video_mode_ptr = NULL;
10656067Smarkm#if ASYNCH
10756067Smarkmstatic  u_char      	kbd_reply = 0;
10856067Smarkm#endif
10990931Snectar
11090931Snectarstatic  u_short mouse_and_mask[16] = {
11190931Snectar	0xc000, 0xe000, 0xf000, 0xf800, 0xfc00, 0xfe00, 0xff00, 0xff80,
11290931Snectar	0xfe00, 0x1e00, 0x1f00, 0x0f00, 0x0f00, 0x0000, 0x0000, 0x0000
11390931Snectar};
11490931Snectarstatic  u_short mouse_or_mask[16] = {
11590931Snectar	0x0000, 0x4000, 0x6000, 0x7000, 0x7800, 0x7c00, 0x7e00, 0x6800,
11690931Snectar	0x0c00, 0x0c00, 0x0600, 0x0600, 0x0000, 0x0000, 0x0000, 0x0000
11757452Smarkm};
11857452Smarkm
11957452Smarkmvoid    none_saver(int blank) { }
12057452Smarkmvoid    (*current_saver)() = none_saver;
12157452Smarkm
12257452Smarkm/* OS specific stuff */
12357452Smarkm#ifdef not_yet_done
12457452Smarkm#define VIRTUAL_TTY(x)  (sccons[x] = ttymalloc(sccons[x]))
12557452Smarkmstruct  CONSOLE_TTY 	(sccons[MAXCONS] = ttymalloc(sccons[MAXCONS]))
12657452Smarkmstruct  tty         	*sccons[MAXCONS+1];
12756067Smarkm#else
12856067Smarkm#define VIRTUAL_TTY(x)  &sccons[x]
12956067Smarkm#define CONSOLE_TTY 	&sccons[MAXCONS]
13056067Smarkmstruct  tty         	sccons[MAXCONS+1];
13156067Smarkmint			nsccons = MAXCONS+1;
13256067Smarkm#endif
133#define MONO_BUF    	pa_to_va(0xB0000)
134#define CGA_BUF     	pa_to_va(0xB8000)
135u_short         	*Crtat = (u_short *)MONO_BUF;
136
137#define WRAPHIST(scp, pointer, offset)\
138    ((scp->history) + ((((pointer) - (scp->history)) + (scp->history_size)\
139    + (offset)) % (scp->history_size)))
140
141struct  isa_driver scdriver = {
142    scprobe, scattach, "sc", 1
143};
144
145int
146scprobe(struct isa_device *dev)
147{
148    int i, retries = 5;
149    unsigned char val;
150
151    /* Enable interrupts and keyboard controller */
152    kbd_wait();
153    outb(KB_STAT, KB_WRITE);
154    kbd_wait();
155    outb(KB_DATA, KB_MODE);
156
157    /* flush any noise in the buffer */
158    while (inb(KB_STAT) & KB_BUF_FULL) {
159	DELAY(10);
160	(void) inb(KB_DATA);
161    }
162
163    /* Reset keyboard hardware */
164    while (retries--) {
165	kbd_wait();
166	outb(KB_DATA, KB_RESET);
167	for (i=0; i<100000; i++) {
168	    DELAY(10);
169	    val = inb(KB_DATA);
170	    if (val == KB_ACK || val == KB_ECHO)
171		goto gotres;
172	    if (val == KB_RESEND)
173		break;
174	}
175    }
176gotres:
177    if (!retries)
178	printf("scprobe: keyboard won't accept RESET command\n");
179    else {
180gotack:
181	DELAY(10);
182	while ((inb(KB_STAT) & KB_BUF_FULL) == 0) DELAY(10);
183	DELAY(10);
184	val = inb(KB_DATA);
185	if (val == KB_ACK)
186	    goto gotack;
187	if (val != KB_RESET_DONE)
188	    printf("scprobe: keyboard RESET failed %02x\n", val);
189    }
190#ifdef XT_KEYBOARD
191    kbd_wait();
192    outb(KB_DATA, 0xF0);
193    kbd_wait();
194    outb(KB_DATA, 1);
195    kbd_wait();
196#endif /* XT_KEYBOARD */
197    return (IO_KBDSIZE);
198}
199
200static struct kern_devconf kdc_sc[NSC] = {
201    0, 0, 0,        		/* filled in by dev_attach */
202    "sc", 0, { MDDT_ISA, 0, "tty" },
203    isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
204    &kdc_isa0,      		/* parent */
205    0,          		/* parentdata */
206    DC_BUSY,        		/* the console is almost always busy */
207    "Graphics console",
208    DC_CLS_DISPLAY		/* class */
209};
210
211static inline void
212sc_registerdev(struct isa_device *id)
213{
214    if(id->id_unit)
215	kdc_sc[id->id_unit] = kdc_sc[0];
216    kdc_sc[id->id_unit].kdc_unit = id->id_unit;
217    kdc_sc[id->id_unit].kdc_isa = id;
218    dev_attach(&kdc_sc[id->id_unit]);
219}
220
221#if NAPM > 0
222static int
223scresume(void *dummy)
224{
225	shfts = 0;
226	ctls = 0;
227	alts = 0;
228	agrs = 0;
229	metas = 0;
230	return 0;
231}
232#endif
233
234int
235scattach(struct isa_device *dev)
236{
237    scr_stat *scp;
238
239    scinit();
240    configuration = dev->id_flags;
241
242    scp = console[0];
243
244    if (crtc_vga) {
245	font_8 = (char *)malloc(8*256, M_DEVBUF, M_NOWAIT);
246	font_14 = (char *)malloc(14*256, M_DEVBUF, M_NOWAIT);
247	font_16 = (char *)malloc(16*256, M_DEVBUF, M_NOWAIT);
248	copy_font(SAVE, FONT_16, font_16);
249	fonts_loaded = FONT_16;
250	scp->font = FONT_16;
251	save_palette();
252    }
253
254    scp->scr_buf = (u_short *)malloc(scp->xsize*scp->ysize*sizeof(u_short),
255				     M_DEVBUF, M_NOWAIT);
256    /* copy screen to buffer */
257    bcopyw(Crtat, scp->scr_buf, scp->xsize * scp->ysize * sizeof(u_short));
258    scp->cursor_pos = scp->scr_buf + scp->xpos + scp->ypos * scp->xsize;
259    scp->mouse_pos = scp->scr_buf;
260
261    /* initialize history buffer & pointers */
262    scp->history_head = scp->history_pos = scp->history =
263	(u_short *)malloc(scp->history_size*sizeof(u_short),
264			  M_DEVBUF, M_NOWAIT);
265    bzero(scp->history_head, scp->history_size*sizeof(u_short));
266
267    /* initialize cursor stuff */
268    draw_cursor(scp, TRUE);
269    if (crtc_vga && (configuration & CHAR_CURSOR))
270	set_destructive_cursor(scp, TRUE);
271
272    /* get screen update going */
273    scrn_timer();
274
275    update_leds(scp->status);
276    sc_registerdev(dev);
277
278    printf("sc%d: ", dev->id_unit);
279    if (crtc_vga)
280	if (crtc_addr == MONO_BASE)
281	    printf("VGA mono");
282	else
283	    printf("VGA color");
284    else
285	if (crtc_addr == MONO_BASE)
286	    printf("MDA/hercules");
287	else
288	    printf("CGA/EGA");
289    printf(" <%d virtual consoles, flags=0x%x>\n", MAXCONS, configuration);
290
291#if NAPM > 0
292    scp->r_hook.ah_fun = scresume;
293    scp->r_hook.ah_arg = NULL;
294    scp->r_hook.ah_name = "system keyboard";
295    scp->r_hook.ah_order = APM_MID_ORDER;
296    apm_hook_establish(APM_HOOK_RESUME , &scp->r_hook);
297#endif
298    return 0;
299}
300
301struct tty
302*scdevtotty(dev_t dev)
303{
304    int unit = minor(dev);
305
306    if (unit > MAXCONS || unit < 0)
307	return(NULL);
308    if (unit == MAXCONS)
309	return CONSOLE_TTY;
310    return VIRTUAL_TTY(unit);
311}
312
313static scr_stat
314*get_scr_stat(dev_t dev)
315{
316    int unit = minor(dev);
317
318    if (unit > MAXCONS || unit < 0)
319	return(NULL);
320    if (unit == MAXCONS)
321	return console[0];
322    return console[unit];
323}
324
325static int
326get_scr_num()
327{
328    int i = 0;
329
330    while ((i < MAXCONS) && (cur_console != console[i]))
331	i++;
332    return i < MAXCONS ? i : 0;
333}
334
335int
336scopen(dev_t dev, int flag, int mode, struct proc *p)
337{
338    struct tty *tp = scdevtotty(dev);
339
340    if (!tp)
341	return(ENXIO);
342
343    tp->t_oproc = scstart;
344    tp->t_param = scparam;
345    tp->t_dev = dev;
346    if (!(tp->t_state & TS_ISOPEN)) {
347	ttychars(tp);
348	tp->t_iflag = TTYDEF_IFLAG;
349	tp->t_oflag = TTYDEF_OFLAG;
350	tp->t_cflag = TTYDEF_CFLAG;
351	tp->t_lflag = TTYDEF_LFLAG;
352	tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
353	scparam(tp, &tp->t_termios);
354	ttsetwater(tp);
355	(*linesw[tp->t_line].l_modem)(tp, 1);
356    }
357    else
358	if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
359	    return(EBUSY);
360    if (!console[minor(dev)])
361	console[minor(dev)] = alloc_scp();
362    return((*linesw[tp->t_line].l_open)(dev, tp));
363}
364
365int
366scclose(dev_t dev, int flag, int mode, struct proc *p)
367{
368    struct tty *tp = scdevtotty(dev);
369    struct scr_stat *scp;
370
371    if (!tp)
372	return(ENXIO);
373    if (minor(dev) < MAXCONS) {
374	scp = get_scr_stat(tp->t_dev);
375	if (scp->status & SWITCH_WAIT_ACQ)
376	    wakeup((caddr_t)&scp->smode);
377#if not_yet_done
378	if (scp == &main_console) {
379	    scp->pid = 0;
380	    scp->proc = NULL;
381	    scp->smode.mode = VT_AUTO;
382	}
383	else {
384	    free(scp->scr_buf, M_DEVBUF);
385	    free(scp->history, M_DEVBUF);
386	    free(scp, M_DEVBUF);
387	    console[minor(dev)] = NULL;
388	}
389#else
390	scp->pid = 0;
391	scp->proc = NULL;
392	scp->smode.mode = VT_AUTO;
393#endif
394    }
395    (*linesw[tp->t_line].l_close)(tp, flag);
396    ttyclose(tp);
397    return(0);
398}
399
400int
401scread(dev_t dev, struct uio *uio, int flag)
402{
403    struct tty *tp = scdevtotty(dev);
404
405    if (!tp)
406	return(ENXIO);
407    return((*linesw[tp->t_line].l_read)(tp, uio, flag));
408}
409
410int
411scwrite(dev_t dev, struct uio *uio, int flag)
412{
413    struct tty *tp = scdevtotty(dev);
414
415    if (!tp)
416	return(ENXIO);
417    return((*linesw[tp->t_line].l_write)(tp, uio, flag));
418}
419
420void
421scintr(int unit)
422{
423    static struct tty *cur_tty;
424    int c, len;
425    u_char *cp;
426
427    /* make screensaver happy */
428    scrn_time_stamp = time.tv_sec;
429    if (scrn_blanked) {
430	(*current_saver)(FALSE);
431	cur_console->start = 0;
432	cur_console->end = cur_console->xsize * cur_console->ysize;
433    }
434
435    c = scgetc(1);
436
437    cur_tty = VIRTUAL_TTY(get_scr_num());
438    if (!(cur_tty->t_state & TS_ISOPEN))
439	if (!((cur_tty = CONSOLE_TTY)->t_state & TS_ISOPEN))
440	    return;
441
442    switch (c & 0xff00) {
443    case 0x0000: /* normal key */
444	(*linesw[cur_tty->t_line].l_rint)(c & 0xFF, cur_tty);
445	break;
446    case NOKEY: /* nothing there */
447	break;
448    case FKEY:  /* function key, return string */
449	if (cp = get_fstr((u_int)c, (u_int *)&len)) {
450	    while (len-- >  0)
451		(*linesw[cur_tty->t_line].l_rint)(*cp++ & 0xFF, cur_tty);
452	}
453	break;
454    case MKEY:  /* meta is active, prepend ESC */
455	(*linesw[cur_tty->t_line].l_rint)(0x1b, cur_tty);
456	(*linesw[cur_tty->t_line].l_rint)(c & 0xFF, cur_tty);
457	break;
458    case BKEY:  /* backtab fixed sequence (esc [ Z) */
459	(*linesw[cur_tty->t_line].l_rint)(0x1b, cur_tty);
460	(*linesw[cur_tty->t_line].l_rint)('[', cur_tty);
461	(*linesw[cur_tty->t_line].l_rint)('Z', cur_tty);
462	break;
463    }
464}
465
466int
467scparam(struct tty *tp, struct termios *t)
468{
469    tp->t_ispeed = t->c_ispeed;
470    tp->t_ospeed = t->c_ospeed;
471    tp->t_cflag = t->c_cflag;
472    return 0;
473}
474
475int
476scioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
477{
478    int i, error;
479    struct tty *tp;
480    struct trapframe *fp;
481    scr_stat *scp;
482
483    tp = scdevtotty(dev);
484    if (!tp)
485	return ENXIO;
486    scp = get_scr_stat(tp->t_dev);
487
488    switch (cmd) {  		/* process console hardware related ioctl's */
489
490    case GIO_ATTR:      	/* get current attributes */
491	*(int*)data = scp->term.cur_attr;
492	return 0;
493
494    case GIO_COLOR:     	/* is this a color console ? */
495	if (crtc_addr == COLOR_BASE)
496	    *(int*)data = 1;
497	else
498	    *(int*)data = 0;
499	return 0;
500
501    case CONS_CURRENT:  	/* get current adapter type */
502	if (crtc_vga)
503	    *(int*)data = KD_VGA;
504	else
505	    if (crtc_addr == MONO_BASE)
506		*(int*)data = KD_MONO;
507	    else
508		*(int*)data = KD_CGA;
509	return 0;
510
511    case CONS_GET:      	/* get current video mode */
512	*(int*)data = scp->mode;
513	return 0;
514
515    case CONS_BLANKTIME:    	/* set screen saver timeout (0 = no saver) */
516	scrn_blank_time = *(int*)data;
517	return 0;
518
519    case CONS_CURSORTYPE:   	/* set cursor type blink/noblink */
520	if ((*(int*)data) & 0x01)
521	    configuration |= BLINK_CURSOR;
522	else
523	    configuration &= ~BLINK_CURSOR;
524	if ((*(int*)data) & 0x02) {
525	    configuration |= CHAR_CURSOR;
526	    set_destructive_cursor(scp, TRUE);
527	} else
528	    configuration &= ~CHAR_CURSOR;
529	return 0;
530
531    case CONS_BELLTYPE: 	/* set bell type sound/visual */
532	if (*data)
533	    configuration |= VISUAL_BELL;
534	else
535	    configuration &= ~VISUAL_BELL;
536	return 0;
537
538    case CONS_HISTORY:  	/* set history size */
539	if (*data) {
540	    free(scp->history, M_DEVBUF);
541	    scp->history_size = *(int*)data;
542	    if (scp->history_size < scp->ysize)
543		scp->history = NULL;
544	    else {
545		scp->history_size *= scp->xsize;
546		scp->history_head = scp->history_pos = scp->history =
547		    (u_short *)malloc(scp->history_size*sizeof(u_short),
548				      M_DEVBUF, M_WAITOK);
549		bzero(scp->history_head, scp->history_size*sizeof(u_short));
550	    }
551	    return 0;
552	}
553	else
554	    return EINVAL;
555
556    case CONS_MOUSECTL:		/* control mouse arrow */
557    {
558	mouse_info_t *mouse = (mouse_info_t*)data;
559	int fontsize;
560
561	switch (scp->font) {
562	default:
563	case FONT_8:
564	    fontsize = 8; break;
565	case FONT_14:
566	    fontsize = 14; break;
567	case FONT_16:
568	    fontsize = 16; break;
569	}
570	switch (mouse->operation) {
571	case MOUSE_SHOW:
572	    if (!(scp->status & MOUSE_ENABLED)) {
573		scp->mouse_oldpos = Crtat + (scp->mouse_pos - scp->scr_buf);
574		scp->status |= (UPDATE_MOUSE | MOUSE_ENABLED);
575	    }
576	    else
577		return EINVAL;
578	    break;
579
580	case MOUSE_HIDE:
581	    if (scp->status & MOUSE_ENABLED) {
582		scp->status &= ~MOUSE_ENABLED;
583		scp->status |= UPDATE_MOUSE;
584	    }
585	    else
586		return EINVAL;
587	    break;
588
589	case MOUSE_MOVEABS:
590	    scp->mouse_xpos = mouse->x;
591	    scp->mouse_ypos = mouse->y;
592	    goto set_mouse_pos;
593
594	case MOUSE_MOVEREL:
595	    scp->mouse_xpos += mouse->x;
596	    scp->mouse_ypos += mouse->y;
597set_mouse_pos:
598	    if (scp->mouse_xpos < 0)
599		scp->mouse_xpos = 0;
600	    if (scp->mouse_ypos < 0)
601		scp->mouse_ypos = 0;
602	    if (scp->mouse_xpos >= scp->xsize*8)
603		scp->mouse_xpos = (scp->xsize*8)-1;
604	    if (scp->mouse_ypos >= scp->ysize*fontsize)
605		scp->mouse_ypos = (scp->ysize*fontsize)-1;
606	    scp->mouse_pos = scp->scr_buf +
607		(scp->mouse_ypos/fontsize)*scp->xsize + scp->mouse_xpos/8;
608	    if (scp->status & MOUSE_ENABLED)
609		scp->status |= UPDATE_MOUSE;
610	    break;
611
612	case MOUSE_GETPOS:
613	    mouse->x = scp->mouse_xpos;
614	    mouse->y = scp->mouse_ypos;
615	    return 0;
616
617	default:
618	    return EINVAL;
619	}
620	/* make screensaver happy */
621	if (scp == cur_console) {
622	    scrn_time_stamp = time.tv_sec;
623	    if (scrn_blanked) {
624		(*current_saver)(FALSE);
625		cur_console->start = 0;
626		cur_console->end = cur_console->xsize * cur_console->ysize;
627	    }
628	}
629	return 0;
630    }
631
632    case CONS_GETINFO:  	/* get current (virtual) console info */
633    {
634	vid_info_t *ptr = (vid_info_t*)data;
635	if (ptr->size == sizeof(struct vid_info)) {
636	    ptr->m_num = get_scr_num();
637	    ptr->mv_col = scp->xpos;
638	    ptr->mv_row = scp->ypos;
639	    ptr->mv_csz = scp->xsize;
640	    ptr->mv_rsz = scp->ysize;
641	    ptr->mv_norm.fore = (scp->term.std_attr & 0x0f00)>>8;
642	    ptr->mv_norm.back = (scp->term.std_attr & 0xf000)>>12;
643	    ptr->mv_rev.fore = (scp->term.rev_attr & 0x0f00)>>8;
644	    ptr->mv_rev.back = (scp->term.rev_attr & 0xf000)>>12;
645	    ptr->mv_grfc.fore = 0;      /* not supported */
646	    ptr->mv_grfc.back = 0;      /* not supported */
647	    ptr->mv_ovscan = scp->border;
648	    ptr->mk_keylock = scp->status & LOCK_KEY_MASK;
649	    return 0;
650	}
651	return EINVAL;
652    }
653
654    case CONS_GETVERS:  	/* get version number */
655	*(int*)data = 0x200;    /* version 2.0 */
656	return 0;
657
658    /* VGA TEXT MODES */
659    case SW_VGA_C40x25:
660    case SW_VGA_C80x25: case SW_VGA_M80x25:
661    case SW_VGA_C80x30: case SW_VGA_M80x30:
662    case SW_VGA_C80x50: case SW_VGA_M80x50:
663    case SW_VGA_C80x60: case SW_VGA_M80x60:
664    case SW_B40x25:     case SW_C40x25:
665    case SW_B80x25:     case SW_C80x25:
666    case SW_ENH_B40x25: case SW_ENH_C40x25:
667    case SW_ENH_B80x25: case SW_ENH_C80x25:
668    case SW_ENH_B80x43: case SW_ENH_C80x43:
669
670	if (!crtc_vga || video_mode_ptr == NULL)
671	    return ENXIO;
672	switch (cmd & 0xff) {
673	case M_VGA_C80x60: case M_VGA_M80x60:
674	    if (!(fonts_loaded & FONT_8))
675		return EINVAL;
676	    scp->xsize = 80;
677	    scp->ysize = 60;
678	    break;
679	case M_VGA_C80x50: case M_VGA_M80x50:
680	    if (!(fonts_loaded & FONT_8))
681		return EINVAL;
682	    scp->xsize = 80;
683	    scp->ysize = 50;
684	    break;
685	case M_ENH_B80x43: case M_ENH_C80x43:
686	    if (!(fonts_loaded & FONT_8))
687		return EINVAL;
688	    scp->xsize = 80;
689	    scp->ysize = 43;
690	    break;
691	case M_VGA_C80x30: case M_VGA_M80x30:
692	    scp->xsize = 80;
693	    scp->ysize = 30;
694	    break;
695	default:
696	    if ((cmd & 0xff) > M_VGA_CG320)
697		return EINVAL;
698	    else
699		scp->xsize = *(video_mode_ptr+((cmd&0xff)*64));
700		scp->ysize = *(video_mode_ptr+((cmd&0xff)*64)+1)+1;
701	    break;
702	}
703	scp->mode = cmd & 0xff;
704	scp->status &= ~UNKNOWN_MODE;   /* text mode */
705	free(scp->scr_buf, M_DEVBUF);
706	scp->scr_buf = (u_short *)malloc(scp->xsize*scp->ysize*sizeof(u_short),
707					 M_DEVBUF, M_WAITOK);
708	if (scp == cur_console)
709	    set_mode(scp);
710	clear_screen(scp);
711	if (tp->t_winsize.ws_col != scp->xsize
712	    || tp->t_winsize.ws_row != scp->ysize) {
713	    tp->t_winsize.ws_col = scp->xsize;
714	    tp->t_winsize.ws_row = scp->ysize;
715	    pgsignal(tp->t_pgrp, SIGWINCH, 1);
716	}
717	return 0;
718
719    /* GRAPHICS MODES */
720    case SW_BG320:     case SW_BG640:
721    case SW_CG320:     case SW_CG320_D:   case SW_CG640_E:
722    case SW_CG640x350: case SW_ENH_CG640:
723    case SW_BG640x480: case SW_CG640x480: case SW_VGA_CG320:
724
725	if (!crtc_vga || video_mode_ptr == NULL)
726	    return ENXIO;
727	scp->mode = cmd & 0xFF;
728	scp->status |= UNKNOWN_MODE;    /* graphics mode */
729	scp->xsize = (*(video_mode_ptr + (scp->mode*64))) * 8;
730	scp->ysize = (*(video_mode_ptr + (scp->mode*64) + 1) + 1) *
731		     (*(video_mode_ptr + (scp->mode*64) + 2));
732	set_mode(scp);
733	/* clear_graphics();*/
734
735	if (tp->t_winsize.ws_xpixel != scp->xsize
736	    || tp->t_winsize.ws_ypixel != scp->ysize) {
737	    tp->t_winsize.ws_xpixel = scp->xsize;
738	    tp->t_winsize.ws_ypixel = scp->ysize;
739	    pgsignal(tp->t_pgrp, SIGWINCH, 1);
740	}
741	return 0;
742
743    case VT_SETMODE:    	/* set screen switcher mode */
744	bcopy(data, &scp->smode, sizeof(struct vt_mode));
745	if (scp->smode.mode == VT_PROCESS) {
746	    scp->proc = p;
747	    scp->pid = scp->proc->p_pid;
748	}
749	return 0;
750
751    case VT_GETMODE:    	/* get screen switcher mode */
752	bcopy(&scp->smode, data, sizeof(struct vt_mode));
753	return 0;
754
755    case VT_RELDISP:    	/* screen switcher ioctl */
756	switch(*data) {
757	case VT_FALSE:  	/* user refuses to release screen, abort */
758	    if (scp == old_scp && (scp->status & SWITCH_WAIT_REL)) {
759		old_scp->status &= ~SWITCH_WAIT_REL;
760		switch_in_progress = FALSE;
761		return 0;
762	    }
763	    return EINVAL;
764
765	case VT_TRUE:   	/* user has released screen, go on */
766	    if (scp == old_scp && (scp->status & SWITCH_WAIT_REL)) {
767		scp->status &= ~SWITCH_WAIT_REL;
768		exchange_scr();
769		if (new_scp->smode.mode == VT_PROCESS) {
770		    new_scp->status |= SWITCH_WAIT_ACQ;
771		    psignal(new_scp->proc, new_scp->smode.acqsig);
772		}
773		else
774		    switch_in_progress = FALSE;
775		return 0;
776	    }
777	    return EINVAL;
778
779	case VT_ACKACQ: 	/* acquire acknowledged, switch completed */
780	    if (scp == new_scp && (scp->status & SWITCH_WAIT_ACQ)) {
781		scp->status &= ~SWITCH_WAIT_ACQ;
782		switch_in_progress = FALSE;
783		return 0;
784	    }
785	    return EINVAL;
786
787	default:
788	    return EINVAL;
789	}
790	/* NOT REACHED */
791
792    case VT_OPENQRY:    	/* return free virtual console */
793	for (i = 0; i < MAXCONS; i++) {
794	    tp = VIRTUAL_TTY(i);
795	    if (!(tp->t_state & TS_ISOPEN)) {
796		*data = i + 1;
797		return 0;
798	    }
799	}
800	return EINVAL;
801
802    case VT_ACTIVATE:   	/* switch to screen *data */
803	return switch_scr(scp, (*data) - 1);
804
805    case VT_WAITACTIVE: 	/* wait for switch to occur */
806	if (*data > MAXCONS || *data < 0)
807	    return EINVAL;
808	if (minor(dev) == (*data) - 1)
809	    return 0;
810	if (*data == 0) {
811	    if (scp == cur_console)
812		return 0;
813	}
814	else
815	    scp = console[(*data) - 1];
816	while ((error=tsleep((caddr_t)&scp->smode, PZERO|PCATCH,
817			     "waitvt", 0)) == ERESTART) ;
818	return error;
819
820    case VT_GETACTIVE:
821	*data = get_scr_num()+1;
822	return 0;
823
824    case KDENABIO:      	/* allow io operations */
825	fp = (struct trapframe *)p->p_md.md_regs;
826	fp->tf_eflags |= PSL_IOPL;
827	return 0;
828
829    case KDDISABIO:     	/* disallow io operations (default) */
830	fp = (struct trapframe *)p->p_md.md_regs;
831	fp->tf_eflags &= ~PSL_IOPL;
832	return 0;
833
834    case KDSETMODE:     	/* set current mode of this (virtual) console */
835	switch (*data) {
836	case KD_TEXT:   	/* switch to TEXT (known) mode */
837	    /* restore fonts & palette ! */
838	    if (crtc_vga) {
839		if (fonts_loaded & FONT_8)
840		    copy_font(LOAD, FONT_8, font_8);
841		if (fonts_loaded & FONT_14)
842		    copy_font(LOAD, FONT_14, font_14);
843		if (fonts_loaded & FONT_16)
844		    copy_font(LOAD, FONT_16, font_16);
845		if (configuration & CHAR_CURSOR)
846		    set_destructive_cursor(scp, TRUE);
847		load_palette();
848	    }
849	    /* FALL THROUGH */
850
851	case KD_TEXT1:  	/* switch to TEXT (known) mode */
852	    /* no restore fonts & palette */
853	    scp->status &= ~UNKNOWN_MODE;
854	    if (crtc_vga && video_mode_ptr)
855		set_mode(scp);
856	    clear_screen(scp);
857	    return 0;
858
859	case KD_GRAPHICS:	/* switch to GRAPHICS (unknown) mode */
860	    scp->status |= UNKNOWN_MODE;
861	    return 0;
862	default:
863	    return EINVAL;
864	}
865	/* NOT REACHED */
866
867    case KDGETMODE:     	/* get current mode of this (virtual) console */
868	*data = (scp->status & UNKNOWN_MODE) ? KD_GRAPHICS : KD_TEXT;
869	return 0;
870
871    case KDSBORDER:     	/* set border color of this (virtual) console */
872	if (!crtc_vga)
873	    return ENXIO;
874	scp->border = *data;
875	if (scp == cur_console)
876	    set_border(scp->border);
877	return 0;
878
879    case KDSKBSTATE:    	/* set keyboard state (locks) */
880	if (*data >= 0 && *data <= LOCK_KEY_MASK) {
881	    scp->status &= ~LOCK_KEY_MASK;
882	    scp->status |= *data;
883	    if (scp == cur_console)
884		update_leds(scp->status);
885	    return 0;
886	}
887	return EINVAL;
888
889    case KDGKBSTATE:    	/* get keyboard state (locks) */
890	*data = scp->status & LOCK_KEY_MASK;
891	return 0;
892
893    case KDSETRAD:      	/* set keyboard repeat & delay rates */
894	if (*data & 0x80)
895	    return EINVAL;
896	i = spltty();
897	kbd_cmd(KB_SETRAD);
898	kbd_cmd(*data);
899	splx(i);
900	return 0;
901
902    case KDSKBMODE:     	/* set keyboard mode */
903	switch (*data) {
904	case K_RAW: 		/* switch to RAW scancode mode */
905	    scp->status |= KBD_RAW_MODE;
906	    return 0;
907
908	case K_XLATE:   	/* switch to XLT ascii mode */
909	    if (scp == cur_console && scp->status == KBD_RAW_MODE)
910		shfts = ctls = alts = agrs = metas = 0;
911	    scp->status &= ~KBD_RAW_MODE;
912	    return 0;
913	default:
914	    return EINVAL;
915	}
916	/* NOT REACHED */
917
918    case KDGKBMODE:     	/* get keyboard mode */
919	*data = (scp->status & KBD_RAW_MODE) ? K_RAW : K_XLATE;
920	return 0;
921
922    case KDMKTONE:      	/* sound the bell */
923	if (*(int*)data)
924	    do_bell(scp, (*(int*)data)&0xffff,
925		    (((*(int*)data)>>16)&0xffff)*hz/1000);
926	else
927	    do_bell(scp, scp->bell_pitch, scp->bell_duration);
928	return 0;
929
930    case KIOCSOUND:     	/* make tone (*data) hz */
931	if (scp == cur_console) {
932	    if (*(int*)data) {
933		int pitch = TIMER_FREQ/(*(int*)data);
934
935		/* set command for counter 2, 2 byte write */
936		if (acquire_timer2(TIMER_16BIT|TIMER_SQWAVE))
937		    return EBUSY;
938
939		/* set pitch */
940		outb(TIMER_CNTR2, pitch);
941		outb(TIMER_CNTR2, (pitch>>8));
942
943		/* enable counter 2 output to speaker */
944		outb(IO_PPI, inb(IO_PPI) | 3);
945	    }
946	    else {
947		/* disable counter 2 output to speaker */
948		outb(IO_PPI, inb(IO_PPI) & 0xFC);
949		release_timer2();
950	    }
951	}
952	return 0;
953
954    case KDGKBTYPE:     	/* get keyboard type */
955	*data = 0;  		/* type not known (yet) */
956	return 0;
957
958    case KDSETLED:      	/* set keyboard LED status */
959	if (*data >= 0 && *data <= LED_MASK) {
960	    scp->status &= ~LED_MASK;
961	    scp->status |= *data;
962	    if (scp == cur_console)
963		update_leds(scp->status);
964	    return 0;
965	}
966	return EINVAL;
967
968    case KDGETLED:      	/* get keyboard LED status */
969	*data = scp->status & LED_MASK;
970	return 0;
971
972    case GETFKEY:       	/* get functionkey string */
973	if (*(u_short*)data < n_fkey_tab) {
974	    fkeyarg_t *ptr = (fkeyarg_t*)data;
975	    bcopy(&fkey_tab[ptr->keynum].str, ptr->keydef,
976		  fkey_tab[ptr->keynum].len);
977	    ptr->flen = fkey_tab[ptr->keynum].len;
978	    return 0;
979	}
980	else
981	    return EINVAL;
982
983    case SETFKEY:       	/* set functionkey string */
984	if (*(u_short*)data < n_fkey_tab) {
985	    fkeyarg_t *ptr = (fkeyarg_t*)data;
986	    bcopy(ptr->keydef, &fkey_tab[ptr->keynum].str,
987		  min(ptr->flen, MAXFK));
988	    fkey_tab[ptr->keynum].len = min(ptr->flen, MAXFK);
989	    return 0;
990	}
991	else
992	    return EINVAL;
993
994    case GIO_SCRNMAP:   	/* get output translation table */
995	bcopy(&scr_map, data, sizeof(scr_map));
996	return 0;
997
998    case PIO_SCRNMAP:   	/* set output translation table */
999	bcopy(data, &scr_map, sizeof(scr_map));
1000	return 0;
1001
1002    case GIO_KEYMAP:    	/* get keyboard translation table */
1003	bcopy(&key_map, data, sizeof(key_map));
1004	return 0;
1005
1006    case PIO_KEYMAP:    	/* set keyboard translation table */
1007	bcopy(data, &key_map, sizeof(key_map));
1008	return 0;
1009
1010    case PIO_FONT8x8:   	/* set 8x8 dot font */
1011	if (!crtc_vga)
1012	    return ENXIO;
1013	bcopy(data, font_8, 8*256);
1014	fonts_loaded |= FONT_8;
1015	copy_font(LOAD, FONT_8, font_8);
1016	if (configuration & CHAR_CURSOR)
1017	    set_destructive_cursor(scp, TRUE);
1018	return 0;
1019
1020    case GIO_FONT8x8:   	/* get 8x8 dot font */
1021	if (!crtc_vga)
1022	    return ENXIO;
1023	if (fonts_loaded & FONT_8) {
1024	    bcopy(font_8, data, 8*256);
1025	    return 0;
1026	}
1027	else
1028	    return ENXIO;
1029
1030    case PIO_FONT8x14:  	/* set 8x14 dot font */
1031	if (!crtc_vga)
1032	    return ENXIO;
1033	bcopy(data, font_14, 14*256);
1034	fonts_loaded |= FONT_14;
1035	copy_font(LOAD, FONT_14, font_14);
1036	if (configuration & CHAR_CURSOR)
1037	    set_destructive_cursor(scp, TRUE);
1038	return 0;
1039
1040    case GIO_FONT8x14:  	/* get 8x14 dot font */
1041	if (!crtc_vga)
1042	    return ENXIO;
1043	if (fonts_loaded & FONT_14) {
1044	    bcopy(font_14, data, 14*256);
1045	    return 0;
1046	}
1047	else
1048	    return ENXIO;
1049
1050    case PIO_FONT8x16:  	/* set 8x16 dot font */
1051	if (!crtc_vga)
1052	    return ENXIO;
1053	bcopy(data, font_16, 16*256);
1054	fonts_loaded |= FONT_16;
1055	copy_font(LOAD, FONT_16, font_16);
1056	if (configuration & CHAR_CURSOR)
1057	    set_destructive_cursor(scp, TRUE);
1058	return 0;
1059
1060    case GIO_FONT8x16:  	/* get 8x16 dot font */
1061	if (!crtc_vga)
1062	    return ENXIO;
1063	if (fonts_loaded & FONT_16) {
1064	    bcopy(font_16, data, 16*256);
1065	    return 0;
1066	}
1067	else
1068	    return ENXIO;
1069    default:
1070	break;
1071    }
1072
1073    error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
1074    if (error >= 0)
1075	return(error);
1076    error = ttioctl(tp, cmd, data, flag);
1077    if (error >= 0)
1078	return(error);
1079    return(ENOTTY);
1080}
1081
1082void
1083scstart(struct tty *tp)
1084{
1085    struct clist *rbp;
1086    int i, s, len;
1087    u_char buf[PCBURST];
1088    scr_stat *scp = get_scr_stat(tp->t_dev);
1089
1090    /* XXX who repeats the call when the above flags are cleared? */
1091    if (scp->status & SLKED || blink_in_progress)
1092	return;
1093    s = spltty();
1094    if (!(tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))) {
1095	tp->t_state |= TS_BUSY;
1096	rbp = &tp->t_outq;
1097	while (rbp->c_cc) {
1098	    len = q_to_b(rbp, buf, PCBURST);
1099	    splx(s);
1100	    ansi_put(scp, buf, len);
1101	    s = spltty();
1102	}
1103	tp->t_state &= ~TS_BUSY;
1104	ttwwakeup(tp);
1105    }
1106    splx(s);
1107}
1108
1109void
1110pccnprobe(struct consdev *cp)
1111{
1112    int maj;
1113
1114    /* locate the major number */
1115    for (maj = 0; maj < nchrdev; maj++)
1116	if ((void*)cdevsw[maj].d_open == (void*)scopen)
1117	    break;
1118
1119    /* initialize required fields */
1120    cp->cn_dev = makedev(maj, MAXCONS);
1121    cp->cn_pri = CN_INTERNAL;
1122}
1123
1124void
1125pccninit(struct consdev *cp)
1126{
1127    scinit();
1128}
1129
1130void
1131pccnputc(dev_t dev, int c)
1132{
1133    u_char buf[1];
1134    scr_stat *scp = console[0];
1135    term_stat save = scp->term;
1136
1137    scp->term = kernel_console;
1138    current_default = &kernel_default;
1139    if (scp->scr_buf == Crtat)
1140	draw_cursor(scp, FALSE);
1141    buf[0] = c;
1142    ansi_put(scp, buf, 1);
1143    kernel_console = scp->term;
1144    current_default = &user_default;
1145    scp->term = save;
1146    if (scp == cur_console /* && scrn_timer not running */) {
1147	if (scp->scr_buf != Crtat && (scp->start <= scp->end)) {
1148	    bcopyw(scp->scr_buf + scp->start, Crtat + scp->start,
1149		   (1 + scp->end - scp->start) * sizeof(u_short));
1150	    scp->start = scp->xsize * scp->ysize;
1151	    scp->end = 0;
1152	    scp->status &= ~CURSOR_SHOWN;
1153	}
1154	draw_cursor(scp, TRUE);
1155    }
1156}
1157
1158int
1159pccngetc(dev_t dev)
1160{
1161    int s = spltty();       /* block scintr while we poll */
1162    int c = scgetc(0);
1163    splx(s);
1164    return(c);
1165}
1166
1167int
1168pccncheckc(dev_t dev)
1169{
1170    return (scgetc(1) & 0xff);
1171}
1172
1173static void
1174scrn_timer()
1175{
1176    static int cursor_blinkrate;
1177    scr_stat *scp = cur_console;
1178
1179    /* should we just return ? */
1180    if ((scp->status&UNKNOWN_MODE) || blink_in_progress || switch_in_progress) {
1181	timeout((timeout_func_t)scrn_timer, 0, hz/10);
1182	return;
1183    }
1184
1185    if (!scrn_blanked) {
1186	/* update screen image */
1187	if (scp->start <= scp->end) {
1188	    bcopyw(scp->scr_buf + scp->start, Crtat + scp->start,
1189		   (1 + scp->end - scp->start) * sizeof(u_short));
1190	    scp->status &= ~CURSOR_SHOWN;
1191	    scp->start = scp->xsize * scp->ysize;
1192	    scp->end = 0;
1193	}
1194	/* update "pseudo" mouse arrow */
1195	if ((scp->status & MOUSE_ENABLED) && (scp->status & UPDATE_MOUSE))
1196	    draw_mouse_image(scp);
1197
1198	/* update cursor image */
1199	if (scp->status & CURSOR_ENABLED)
1200	    draw_cursor(scp,
1201		!(configuration&BLINK_CURSOR) || !(cursor_blinkrate++&0x04));
1202    }
1203    if (scrn_blank_time && (time.tv_sec>scrn_time_stamp+scrn_blank_time))
1204	(*current_saver)(TRUE);
1205    timeout((timeout_func_t)scrn_timer, 0, hz/25);
1206}
1207
1208static void
1209clear_screen(scr_stat *scp)
1210{
1211    move_crsr(scp, 0, 0);
1212    fillw(scp->term.cur_attr | scr_map[0x20], scp->scr_buf,
1213	  scp->xsize * scp->ysize);
1214    mark_all(scp);
1215}
1216
1217static int
1218switch_scr(scr_stat *scp, u_int next_scr)
1219{
1220    if (switch_in_progress && (cur_console->proc != pfind(cur_console->pid)))
1221	switch_in_progress = FALSE;
1222
1223    if (next_scr >= MAXCONS || switch_in_progress ||
1224	(cur_console->smode.mode == VT_AUTO
1225	 && cur_console->status & UNKNOWN_MODE)) {
1226	do_bell(scp, BELL_PITCH, BELL_DURATION);
1227	return EINVAL;
1228    }
1229
1230    /* is the wanted virtual console open ? */
1231    if (next_scr) {
1232	struct tty *tp = VIRTUAL_TTY(next_scr);
1233	if (!(tp->t_state & TS_ISOPEN)) {
1234	    do_bell(scp, BELL_PITCH, BELL_DURATION);
1235	    return EINVAL;
1236	}
1237    }
1238    /* delay switch if actively updating screen */
1239    if (write_in_progress || blink_in_progress) {
1240	delayed_next_scr = next_scr+1;
1241	return 0;
1242    }
1243    switch_in_progress = TRUE;
1244    old_scp = cur_console;
1245    new_scp = console[next_scr];
1246    wakeup((caddr_t)&new_scp->smode);
1247    if (new_scp == old_scp) {
1248	switch_in_progress = FALSE;
1249	delayed_next_scr = FALSE;
1250	return 0;
1251    }
1252
1253    /* has controlling process died? */
1254    if (old_scp->proc && (old_scp->proc != pfind(old_scp->pid)))
1255	old_scp->smode.mode = VT_AUTO;
1256    if (new_scp->proc && (new_scp->proc != pfind(new_scp->pid)))
1257	new_scp->smode.mode = VT_AUTO;
1258
1259    /* check the modes and switch approbiatly */
1260    if (old_scp->smode.mode == VT_PROCESS) {
1261	old_scp->status |= SWITCH_WAIT_REL;
1262	psignal(old_scp->proc, old_scp->smode.relsig);
1263    }
1264    else {
1265	exchange_scr();
1266	if (new_scp->smode.mode == VT_PROCESS) {
1267	    new_scp->status |= SWITCH_WAIT_ACQ;
1268	    psignal(new_scp->proc, new_scp->smode.acqsig);
1269	}
1270	else
1271	    switch_in_progress = FALSE;
1272    }
1273    return 0;
1274}
1275
1276static void
1277exchange_scr(void)
1278{
1279    move_crsr(old_scp, old_scp->xpos, old_scp->ypos);
1280    cur_console = new_scp;
1281    if (old_scp->mode != new_scp->mode || (old_scp->status & UNKNOWN_MODE)){
1282	if (crtc_vga && video_mode_ptr)
1283	    set_mode(new_scp);
1284    }
1285    move_crsr(new_scp, new_scp->xpos, new_scp->ypos);
1286    if ((old_scp->status & UNKNOWN_MODE) && crtc_vga) {
1287	if (fonts_loaded & FONT_8)
1288	    copy_font(LOAD, FONT_8, font_8);
1289	if (fonts_loaded & FONT_14)
1290	    copy_font(LOAD, FONT_14, font_14);
1291	if (fonts_loaded & FONT_16)
1292	    copy_font(LOAD, FONT_16, font_16);
1293	if (configuration & CHAR_CURSOR)
1294	    set_destructive_cursor(new_scp, TRUE);
1295	load_palette();
1296    }
1297    if (old_scp->status & KBD_RAW_MODE || new_scp->status & KBD_RAW_MODE)
1298	shfts = ctls = alts = agrs = metas = 0;
1299    update_leds(new_scp->status);
1300    delayed_next_scr = FALSE;
1301    bcopyw(new_scp->scr_buf, Crtat,
1302	   (new_scp->xsize*new_scp->ysize)*sizeof(u_short));
1303    new_scp->status &= ~CURSOR_SHOWN;
1304}
1305
1306static inline void
1307move_crsr(scr_stat *scp, int x, int y)
1308{
1309    if (x < 0 || y < 0 || x >= scp->xsize || y >= scp->ysize)
1310	return;
1311    scp->xpos = x;
1312    scp->ypos = y;
1313    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1314    scp->cursor_pos = scp->scr_buf + scp->ypos * scp->xsize + scp->xpos;
1315    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1316}
1317
1318static void
1319scan_esc(scr_stat *scp, u_char c)
1320{
1321    static u_char ansi_col[16] =
1322	{0, 4, 2, 6, 1, 5, 3, 7, 8, 12, 10, 14, 9, 13, 11, 15};
1323    int i, n;
1324    u_short *src, *dst, count;
1325
1326    if (scp->term.esc == 1) {
1327	switch (c) {
1328
1329	case '[':   /* Start ESC [ sequence */
1330	    scp->term.esc = 2;
1331	    scp->term.last_param = -1;
1332	    for (i = scp->term.num_param; i < MAX_ESC_PAR; i++)
1333		scp->term.param[i] = 1;
1334	    scp->term.num_param = 0;
1335	    return;
1336
1337	case 'M':   /* Move cursor up 1 line, scroll if at top */
1338	    if (scp->ypos > 0)
1339		move_crsr(scp, scp->xpos, scp->ypos - 1);
1340	    else {
1341		bcopyw(scp->scr_buf, scp->scr_buf + scp->xsize,
1342		       (scp->ysize - 1) * scp->xsize * sizeof(u_short));
1343		fillw(scp->term.cur_attr | scr_map[0x20],
1344		      scp->scr_buf, scp->xsize);
1345    		mark_all(scp);
1346	    }
1347	    break;
1348#if notyet
1349	case 'Q':
1350	    scp->term.esc = 4;
1351	    break;
1352#endif
1353	case 'c':   /* Clear screen & home */
1354	    clear_screen(scp);
1355	    break;
1356	}
1357    }
1358    else if (scp->term.esc == 2) {
1359	if (c >= '0' && c <= '9') {
1360	    if (scp->term.num_param < MAX_ESC_PAR) {
1361	    if (scp->term.last_param != scp->term.num_param) {
1362		scp->term.last_param = scp->term.num_param;
1363		scp->term.param[scp->term.num_param] = 0;
1364	    }
1365	    else
1366		scp->term.param[scp->term.num_param] *= 10;
1367	    scp->term.param[scp->term.num_param] += c - '0';
1368	    return;
1369	    }
1370	}
1371	scp->term.num_param = scp->term.last_param + 1;
1372	switch (c) {
1373
1374	case ';':
1375	    if (scp->term.num_param < MAX_ESC_PAR)
1376		return;
1377	    break;
1378
1379	case '=':
1380	    scp->term.esc = 3;
1381	    scp->term.last_param = -1;
1382	    for (i = scp->term.num_param; i < MAX_ESC_PAR; i++)
1383		scp->term.param[i] = 1;
1384	    scp->term.num_param = 0;
1385	    return;
1386
1387	case 'A':   /* up n rows */
1388	    n = scp->term.param[0]; if (n < 1) n = 1;
1389	    move_crsr(scp, scp->xpos, scp->ypos - n);
1390	    break;
1391
1392	case 'B':   /* down n rows */
1393	    n = scp->term.param[0]; if (n < 1) n = 1;
1394	    move_crsr(scp, scp->xpos, scp->ypos + n);
1395	    break;
1396
1397	case 'C':   /* right n columns */
1398	    n = scp->term.param[0]; if (n < 1) n = 1;
1399	    move_crsr(scp, scp->xpos + n, scp->ypos);
1400	    break;
1401
1402	case 'D':   /* left n columns */
1403	    n = scp->term.param[0]; if (n < 1) n = 1;
1404	    move_crsr(scp, scp->xpos - n, scp->ypos);
1405	    break;
1406
1407	case 'E':   /* cursor to start of line n lines down */
1408	    n = scp->term.param[0]; if (n < 1) n = 1;
1409	    move_crsr(scp, 0, scp->ypos + n);
1410	    break;
1411
1412	case 'F':   /* cursor to start of line n lines up */
1413	    n = scp->term.param[0]; if (n < 1) n = 1;
1414	    move_crsr(scp, 0, scp->ypos - n);
1415	    break;
1416
1417	case 'f':   /* Cursor move */
1418	case 'H':
1419	    if (scp->term.num_param == 0)
1420		move_crsr(scp, 0, 0);
1421	    else if (scp->term.num_param == 2)
1422		move_crsr(scp, scp->term.param[1] - 1, scp->term.param[0] - 1);
1423	    break;
1424
1425	case 'J':   /* Clear all or part of display */
1426	    if (scp->term.num_param == 0)
1427		n = 0;
1428	    else
1429		n = scp->term.param[0];
1430	    switch (n) {
1431	    case 0: /* clear form cursor to end of display */
1432		fillw(scp->term.cur_attr | scr_map[0x20],
1433		      scp->cursor_pos,
1434		      scp->scr_buf + scp->xsize * scp->ysize - scp->cursor_pos);
1435    		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1436    		mark_for_update(scp, scp->xsize * scp->ysize);
1437		break;
1438	    case 1: /* clear from beginning of display to cursor */
1439		fillw(scp->term.cur_attr | scr_map[0x20],
1440		      scp->scr_buf,
1441		      scp->cursor_pos - scp->scr_buf);
1442    		mark_for_update(scp, 0);
1443    		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1444		break;
1445	    case 2: /* clear entire display */
1446		clear_screen(scp);
1447		break;
1448	    }
1449	    break;
1450
1451	case 'K':   /* Clear all or part of line */
1452	    if (scp->term.num_param == 0)
1453		n = 0;
1454	    else
1455		n = scp->term.param[0];
1456	    switch (n) {
1457	    case 0: /* clear form cursor to end of line */
1458		fillw(scp->term.cur_attr | scr_map[0x20],
1459		      scp->cursor_pos,
1460		      scp->xsize - scp->xpos);
1461    		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1462    		mark_for_update(scp, scp->cursor_pos - scp->scr_buf +
1463				scp->xsize - scp->xpos);
1464		break;
1465	    case 1: /* clear from beginning of line to cursor */
1466		fillw(scp->term.cur_attr|scr_map[0x20],
1467		      scp->cursor_pos - (scp->xsize - scp->xpos),
1468		      (scp->xsize - scp->xpos) + 1);
1469    		mark_for_update(scp, scp->ypos * scp->xsize);
1470    		mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1471		break;
1472	    case 2: /* clear entire line */
1473		fillw(scp->term.cur_attr|scr_map[0x20],
1474		      scp->cursor_pos - (scp->xsize - scp->xpos),
1475		      scp->xsize);
1476    		mark_for_update(scp, scp->ypos * scp->xsize);
1477    		mark_for_update(scp, (scp->ypos + 1) * scp->xsize);
1478		break;
1479	    }
1480	    break;
1481
1482	case 'L':   /* Insert n lines */
1483	    n = scp->term.param[0]; if (n < 1) n = 1;
1484	    if (n > scp->ysize - scp->ypos)
1485		n = scp->ysize - scp->ypos;
1486	    src = scp->scr_buf + scp->ypos * scp->xsize;
1487	    dst = src + n * scp->xsize;
1488	    count = scp->ysize - (scp->ypos + n);
1489	    bcopyw(src, dst, count * scp->xsize * sizeof(u_short));
1490	    fillw(scp->term.cur_attr | scr_map[0x20], src,
1491		  n * scp->xsize);
1492	    mark_for_update(scp, scp->ypos * scp->xsize);
1493	    mark_for_update(scp, scp->xsize * scp->ysize);
1494	    break;
1495
1496	case 'M':   /* Delete n lines */
1497	    n = scp->term.param[0]; if (n < 1) n = 1;
1498	    if (n > scp->ysize - scp->ypos)
1499		n = scp->ysize - scp->ypos;
1500	    dst = scp->scr_buf + scp->ypos * scp->xsize;
1501	    src = dst + n * scp->xsize;
1502	    count = scp->ysize - (scp->ypos + n);
1503	    bcopyw(src, dst, count * scp->xsize * sizeof(u_short));
1504	    src = dst + count * scp->xsize;
1505	    fillw(scp->term.cur_attr | scr_map[0x20], src,
1506		  n * scp->xsize);
1507	    mark_for_update(scp, scp->ypos * scp->xsize);
1508	    mark_for_update(scp, scp->xsize * scp->ysize);
1509	    break;
1510
1511	case 'P':   /* Delete n chars */
1512	    n = scp->term.param[0]; if (n < 1) n = 1;
1513	    if (n > scp->xsize - scp->xpos)
1514		n = scp->xsize - scp->xpos;
1515	    dst = scp->cursor_pos;
1516	    src = dst + n;
1517	    count = scp->xsize - (scp->xpos + n);
1518	    bcopyw(src, dst, count * sizeof(u_short));
1519	    src = dst + count;
1520	    fillw(scp->term.cur_attr | scr_map[0x20], src, n);
1521	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1522	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf + n + count);
1523	    break;
1524
1525	case '@':   /* Insert n chars */
1526	    n = scp->term.param[0]; if (n < 1) n = 1;
1527	    if (n > scp->xsize - scp->xpos)
1528		n = scp->xsize - scp->xpos;
1529	    src = scp->cursor_pos;
1530	    dst = src + n;
1531	    count = scp->xsize - (scp->xpos + n);
1532	    bcopyw(src, dst, count * sizeof(u_short));
1533	    fillw(scp->term.cur_attr | scr_map[0x20], src, n);
1534	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1535	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf + n + count);
1536	    break;
1537
1538	case 'S':   /* scroll up n lines */
1539	    n = scp->term.param[0]; if (n < 1)  n = 1;
1540	    if (n > scp->ysize)
1541		n = scp->ysize;
1542	    bcopyw(scp->scr_buf + (scp->xsize * n),
1543		   scp->scr_buf,
1544		   scp->xsize * (scp->ysize - n) * sizeof(u_short));
1545	    fillw(scp->term.cur_attr | scr_map[0x20],
1546		  scp->scr_buf + scp->xsize * (scp->ysize - n),
1547		  scp->xsize * n);
1548    	    mark_all(scp);
1549	    break;
1550
1551	case 'T':   /* scroll down n lines */
1552	    n = scp->term.param[0]; if (n < 1)  n = 1;
1553	    if (n > scp->ysize)
1554		n = scp->ysize;
1555	    bcopyw(scp->scr_buf,
1556		  scp->scr_buf + (scp->xsize * n),
1557		  scp->xsize * (scp->ysize - n) *
1558		  sizeof(u_short));
1559	    fillw(scp->term.cur_attr | scr_map[0x20],
1560		  scp->scr_buf, scp->xsize * n);
1561    	    mark_all(scp);
1562	    break;
1563
1564	case 'X':   /* erase n characters in line */
1565	    n = scp->term.param[0]; if (n < 1)  n = 1;
1566	    if (n > scp->xsize - scp->xpos)
1567		n = scp->xsize - scp->xpos;
1568	    fillw(scp->term.cur_attr | scr_map[0x20],
1569		  scp->scr_buf + scp->xpos +
1570		  ((scp->xsize*scp->ypos) * sizeof(u_short)), n);
1571	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1572	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf + n);
1573	    break;
1574
1575	case 'Z':   /* move n tabs backwards */
1576	    n = scp->term.param[0]; if (n < 1)  n = 1;
1577	    if ((i = scp->xpos & 0xf8) == scp->xpos)
1578		i -= 8*n;
1579	    else
1580		i -= 8*(n-1);
1581	    if (i < 0)
1582		i = 0;
1583	    move_crsr(scp, i, scp->ypos);
1584	    break;
1585
1586	case '`':   /* move cursor to column n */
1587	    n = scp->term.param[0]; if (n < 1)  n = 1;
1588	    move_crsr(scp, n - 1, scp->ypos);
1589	    break;
1590
1591	case 'a':   /* move cursor n columns to the right */
1592	    n = scp->term.param[0]; if (n < 1)  n = 1;
1593	    move_crsr(scp, scp->xpos + n, scp->ypos);
1594	    break;
1595
1596	case 'd':   /* move cursor to row n */
1597	    n = scp->term.param[0]; if (n < 1)  n = 1;
1598	    move_crsr(scp, scp->xpos, n - 1);
1599	    break;
1600
1601	case 'e':   /* move cursor n rows down */
1602	    n = scp->term.param[0]; if (n < 1)  n = 1;
1603	    move_crsr(scp, scp->xpos, scp->ypos + n);
1604	    break;
1605
1606	case 'm':   /* change attribute */
1607	    if (scp->term.num_param == 0) {
1608		scp->term.cur_attr = scp->term.std_attr;
1609		break;
1610	    }
1611	    for (i = 0; i < scp->term.num_param; i++) {
1612		switch (n = scp->term.param[i]) {
1613		case 0: /* back to normal */
1614		    scp->term.cur_attr = scp->term.std_attr;
1615		    break;
1616		case 1: /* highlight (bold) */
1617		    scp->term.cur_attr &= 0xFF00;
1618		    scp->term.cur_attr |= 0x0800;
1619		    break;
1620		case 4: /* highlight (underline) */
1621		    scp->term.cur_attr &= 0xFF00;
1622		    scp->term.cur_attr |= 0x0800;
1623		    break;
1624		case 5: /* blink */
1625		    scp->term.cur_attr &= 0xFF00;
1626		    scp->term.cur_attr |= 0x8000;
1627		    break;
1628		case 7: /* reverse video */
1629		    scp->term.cur_attr = scp->term.rev_attr;
1630		    break;
1631		case 30: case 31: /* set fg color */
1632		case 32: case 33: case 34:
1633		case 35: case 36: case 37:
1634		    scp->term.cur_attr =
1635			(scp->term.cur_attr&0xF8FF) | (ansi_col[(n-30)&7]<<8);
1636		    break;
1637		case 40: case 41: /* set bg color */
1638		case 42: case 43: case 44:
1639		case 45: case 46: case 47:
1640		    scp->term.cur_attr =
1641			(scp->term.cur_attr&0x8FFF) | (ansi_col[(n-40)&7]<<12);
1642		    break;
1643		}
1644	    }
1645	    break;
1646
1647	case 'x':
1648	    if (scp->term.num_param == 0)
1649		n = 0;
1650	    else
1651		n = scp->term.param[0];
1652	    switch (n) {
1653	    case 0:     /* reset attributes */
1654		scp->term.cur_attr = scp->term.std_attr =
1655		    current_default->std_attr;
1656		scp->term.rev_attr = current_default->rev_attr;
1657		break;
1658	    case 1:     /* set ansi background */
1659		scp->term.cur_attr = scp->term.std_attr =
1660		    (scp->term.std_attr & 0x0F00) |
1661		    (ansi_col[(scp->term.param[1])&0x0F]<<12);
1662		break;
1663	    case 2:     /* set ansi foreground */
1664		scp->term.cur_attr = scp->term.std_attr =
1665		    (scp->term.std_attr & 0xF000) |
1666		    (ansi_col[(scp->term.param[1])&0x0F]<<8);
1667		break;
1668	    case 3:     /* set ansi attribute directly */
1669		scp->term.cur_attr = scp->term.std_attr =
1670		    (scp->term.param[1]&0xFF)<<8;
1671		break;
1672	    case 5:     /* set ansi reverse video background */
1673		scp->term.rev_attr =
1674		    (scp->term.rev_attr & 0x0F00) |
1675		    (ansi_col[(scp->term.param[1])&0x0F]<<12);
1676		break;
1677	    case 6:     /* set ansi reverse video foreground */
1678		scp->term.rev_attr =
1679		    (scp->term.rev_attr & 0xF000) |
1680		    (ansi_col[(scp->term.param[1])&0x0F]<<8);
1681		break;
1682	    case 7:     /* set ansi reverse video directly */
1683		scp->term.rev_attr =
1684		    (scp->term.param[1]&0xFF)<<8;
1685		break;
1686	    }
1687	    break;
1688
1689	case 'z':   /* switch to (virtual) console n */
1690	    if (scp->term.num_param == 1)
1691		switch_scr(scp, scp->term.param[0]);
1692	    break;
1693	}
1694    }
1695    else if (scp->term.esc == 3) {
1696	if (c >= '0' && c <= '9') {
1697	    if (scp->term.num_param < MAX_ESC_PAR) {
1698	    if (scp->term.last_param != scp->term.num_param) {
1699		scp->term.last_param = scp->term.num_param;
1700		scp->term.param[scp->term.num_param] = 0;
1701	    }
1702	    else
1703		scp->term.param[scp->term.num_param] *= 10;
1704	    scp->term.param[scp->term.num_param] += c - '0';
1705	    return;
1706	    }
1707	}
1708	scp->term.num_param = scp->term.last_param + 1;
1709	switch (c) {
1710
1711	case ';':
1712	    if (scp->term.num_param < MAX_ESC_PAR)
1713		return;
1714	    break;
1715
1716	case 'A':   /* set display border color */
1717	    if (scp->term.num_param == 1)
1718		scp->border=scp->term.param[0] & 0xff;
1719		if (scp == cur_console)
1720		    set_border(scp->border);
1721	    break;
1722
1723	case 'B':   /* set bell pitch and duration */
1724	    if (scp->term.num_param == 2) {
1725		scp->bell_pitch = scp->term.param[0];
1726		scp->bell_duration = scp->term.param[1]*10;
1727	    }
1728	    break;
1729
1730	case 'C':   /* set cursor type & shape */
1731	    if (scp->term.num_param == 1) {
1732		if (scp->term.param[0] & 0x01)
1733		    configuration |= BLINK_CURSOR;
1734		else
1735		    configuration &= ~BLINK_CURSOR;
1736		if (scp->term.param[0] & 0x02) {
1737		    configuration |= CHAR_CURSOR;
1738		    set_destructive_cursor(scp, TRUE);
1739		} else
1740		    configuration &= ~CHAR_CURSOR;
1741	    }
1742	    else if (scp->term.num_param == 2) {
1743		scp->cursor_start = scp->term.param[0] & 0x1F;
1744		scp->cursor_end = scp->term.param[1] & 0x1F;
1745		if (configuration & CHAR_CURSOR)
1746			set_destructive_cursor(scp, TRUE);
1747	    }
1748	    break;
1749
1750	case 'F':   /* set ansi foreground */
1751	    if (scp->term.num_param == 1)
1752		scp->term.cur_attr = scp->term.std_attr =
1753		    (scp->term.std_attr & 0xF000)
1754		    | ((scp->term.param[0] & 0x0F) << 8);
1755	    break;
1756
1757	case 'G':   /* set ansi background */
1758	    if (scp->term.num_param == 1)
1759		scp->term.cur_attr = scp->term.std_attr =
1760		    (scp->term.std_attr & 0x0F00)
1761		    | ((scp->term.param[0] & 0x0F) << 12);
1762	    break;
1763
1764	case 'H':   /* set ansi reverse video foreground */
1765	    if (scp->term.num_param == 1)
1766		scp->term.rev_attr =
1767		    (scp->term.rev_attr & 0xF000)
1768		    | ((scp->term.param[0] & 0x0F) << 8);
1769	    break;
1770
1771	case 'I':   /* set ansi reverse video background */
1772	    if (scp->term.num_param == 1)
1773		scp->term.rev_attr =
1774		    (scp->term.rev_attr & 0x0F00)
1775		    | ((scp->term.param[0] & 0x0F) << 12);
1776	    break;
1777	}
1778    }
1779    scp->term.esc = 0;
1780}
1781
1782static inline void
1783draw_cursor(scr_stat *scp, int show)
1784{
1785    if (show && !(scp->status & CURSOR_SHOWN)) {
1786	u_short cursor_image = *(Crtat + (scp->cursor_pos - scp->scr_buf));
1787
1788	scp->cursor_saveunder = cursor_image;
1789	if (configuration & CHAR_CURSOR) {
1790	    set_destructive_cursor(scp, FALSE);
1791	    cursor_image = (cursor_image & 0xff00) | DEAD_CHAR;
1792	}
1793	else {
1794	    if ((cursor_image & 0x7000) == 0x7000) {
1795		cursor_image &= 0x8fff;
1796		if(!(cursor_image & 0x0700))
1797		    cursor_image |= 0x0700;
1798	    } else {
1799		cursor_image |= 0x7000;
1800		if ((cursor_image & 0x0700) == 0x0700)
1801		    cursor_image &= 0xf0ff;
1802	    }
1803	}
1804	*(Crtat + (scp->cursor_pos - scp->scr_buf)) = cursor_image;
1805	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1806	scp->status |= CURSOR_SHOWN;
1807    }
1808    if (!show && (scp->status & CURSOR_SHOWN)) {
1809	*(Crtat + (scp->cursor_pos - scp->scr_buf)) = scp->cursor_saveunder;
1810	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1811	scp->status &= ~CURSOR_SHOWN;
1812    }
1813}
1814
1815static void
1816ansi_put(scr_stat *scp, u_char *buf, int len)
1817{
1818    u_char *ptr = buf;
1819
1820    if (scp->status & UNKNOWN_MODE)
1821	return;
1822
1823    /* make screensaver happy */
1824    if (scp == cur_console) {
1825	scrn_time_stamp = time.tv_sec;
1826	if (scrn_blanked) {
1827	    (*current_saver)(FALSE);
1828	    cur_console->start = 0;
1829	    cur_console->end = cur_console->xsize * cur_console->ysize;
1830	}
1831    }
1832    write_in_progress++;
1833outloop:
1834    if (scp->term.esc) {
1835	scan_esc(scp, *ptr++);
1836	len--;
1837    }
1838    else if (PRINTABLE(*ptr)) {     /* Print only printables */
1839 	int cnt = len <= (scp->xsize-scp->xpos) ? len : (scp->xsize-scp->xpos);
1840 	u_short cur_attr = scp->term.cur_attr;
1841 	u_short *cursor_pos = scp->cursor_pos;
1842	do {
1843	    /*
1844	     * gcc-2.6.3 generates poor (un)sign extension code.  Casting the
1845	     * pointers in the following to volatile should have no effect,
1846	     * but in fact speeds up this inner loop from 26 to 18 cycles
1847	     * (+ cache misses) on i486's.
1848	     */
1849#define	UCVP(ucp)	((u_char volatile *)(ucp))
1850	    *cursor_pos++ = UCVP(scr_map)[*UCVP(ptr)] | cur_attr;
1851	    ptr++;
1852	    cnt--;
1853	} while (cnt && PRINTABLE(*ptr));
1854	len -= (cursor_pos - scp->cursor_pos);
1855	scp->xpos += (cursor_pos - scp->cursor_pos);
1856	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1857	mark_for_update(scp, cursor_pos - scp->scr_buf);
1858	scp->cursor_pos = cursor_pos;
1859	if (scp->xpos >= scp->xsize) {
1860	    scp->xpos = 0;
1861	    scp->ypos++;
1862	}
1863    }
1864    else  {
1865	switch(*ptr) {
1866	case 0x07:
1867	    do_bell(scp, scp->bell_pitch, scp->bell_duration);
1868	    break;
1869
1870	case 0x08:      /* non-destructive backspace */
1871	    if (scp->cursor_pos > scp->scr_buf) {
1872	    	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1873		scp->cursor_pos--;
1874	    	mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1875		if (scp->xpos > 0)
1876		    scp->xpos--;
1877		else {
1878		    scp->xpos += scp->xsize - 1;
1879		    scp->ypos--;
1880		}
1881	    }
1882	    break;
1883
1884	case 0x09:  /* non-destructive tab */
1885	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1886	    scp->cursor_pos += (8 - scp->xpos % 8u);
1887	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1888	    if ((scp->xpos += (8 - scp->xpos % 8u)) >= scp->xsize) {
1889	        scp->xpos = 0;
1890	        scp->ypos++;
1891	    }
1892	    break;
1893
1894	case 0x0a:  /* newline, same pos */
1895	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1896	    scp->cursor_pos += scp->xsize;
1897	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1898	    scp->ypos++;
1899	    break;
1900
1901	case 0x0c:  /* form feed, clears screen */
1902	    clear_screen(scp);
1903	    break;
1904
1905	case 0x0d:  /* return, return to pos 0 */
1906	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1907	    scp->cursor_pos -= scp->xpos;
1908	    mark_for_update(scp, scp->cursor_pos - scp->scr_buf);
1909	    scp->xpos = 0;
1910	    break;
1911
1912	case 0x1b:  /* start escape sequence */
1913	    scp->term.esc = 1;
1914	    scp->term.num_param = 0;
1915	    break;
1916	}
1917	ptr++; len--;
1918    }
1919    /* do we have to scroll ?? */
1920    if (scp->cursor_pos >= scp->scr_buf + scp->ysize * scp->xsize) {
1921	if (scp->history) {
1922	    bcopyw(scp->scr_buf, scp->history_head,
1923		   scp->xsize * sizeof(u_short));
1924	    scp->history_head += scp->xsize;
1925	    if (scp->history_head + scp->xsize >
1926		scp->history + scp->history_size)
1927		scp->history_head = scp->history;
1928	}
1929	bcopyw(scp->scr_buf + scp->xsize, scp->scr_buf,
1930	       scp->xsize * (scp->ysize - 1) * sizeof(u_short));
1931	fillw(scp->term.cur_attr | scr_map[0x20],
1932	      scp->scr_buf + scp->xsize * (scp->ysize - 1),
1933	      scp->xsize);
1934	scp->cursor_pos -= scp->xsize;
1935	scp->ypos--;
1936    	mark_all(scp);
1937    }
1938    if (len)
1939	goto outloop;
1940    write_in_progress--;
1941    if (delayed_next_scr)
1942	switch_scr(scp, delayed_next_scr - 1);
1943}
1944
1945static void
1946scinit(void)
1947{
1948    u_short volatile *cp = Crtat + (CGA_BUF-MONO_BUF)/sizeof(u_short), was;
1949    unsigned hw_cursor;
1950    int i;
1951
1952    if (init_done)
1953	return;
1954    init_done = TRUE;
1955    /*
1956     * Crtat initialized to point to MONO buffer, if not present change
1957     * to CGA_BUF offset. ONLY add the difference since locore.s adds
1958     * in the remapped offset at the "right" time
1959     */
1960    was = *cp;
1961    *cp = (u_short) 0xA55A;
1962    if (*cp != 0xA55A)
1963	crtc_addr = MONO_BASE;
1964    else {
1965	*cp = was;
1966	crtc_addr = COLOR_BASE;
1967	Crtat = Crtat + (CGA_BUF-MONO_BUF)/sizeof(u_short);
1968    }
1969
1970    /* extract cursor location */
1971    outb(crtc_addr, 14);
1972    hw_cursor = inb(crtc_addr + 1) << 8;
1973    outb(crtc_addr, 15);
1974    hw_cursor |= inb(crtc_addr + 1);
1975
1976    /* move hardware cursor out of the way */
1977    outb(crtc_addr, 14);
1978    outb(crtc_addr + 1, 0xff);
1979    outb(crtc_addr, 15);
1980    outb(crtc_addr + 1, 0xff);
1981
1982    /* is this a VGA or higher ? */
1983    outb(crtc_addr, 7);
1984    if (inb(crtc_addr) == 7) {
1985	u_long  pa;
1986	u_long  segoff;
1987
1988	crtc_vga = TRUE;
1989	/*
1990	 * Get the BIOS video mode pointer.
1991	 */
1992	segoff = *(u_long *)pa_to_va(0x4a8);
1993	pa = (((segoff & 0xffff0000) >> 12) + (segoff & 0xffff));
1994	if (ISMAPPED(pa, sizeof(u_long))) {
1995	    segoff = *(u_long *)pa_to_va(pa);
1996	    pa = (((segoff & 0xffff0000) >> 12) + (segoff & 0xffff));
1997	    if (ISMAPPED(pa, 64))
1998		video_mode_ptr = (char *)pa_to_va(pa);
1999	}
2000    }
2001    current_default = &user_default;
2002    console[0] = &main_console;
2003    init_scp(console[0]);
2004    console[0]->scr_buf = console[0]->mouse_pos =  Crtat;
2005    console[0]->cursor_pos = Crtat + hw_cursor;
2006    console[0]->xpos = hw_cursor % COL;
2007    console[0]->ypos = hw_cursor / COL;
2008    cur_console = console[0];
2009    for (i=1; i<MAXCONS; i++)
2010	console[i] = NULL;
2011    kernel_console.esc = 0;
2012    kernel_console.std_attr = kernel_default.std_attr;
2013    kernel_console.rev_attr = kernel_default.rev_attr;
2014    kernel_console.cur_attr = kernel_default.std_attr;
2015    /* initialize mapscrn array to a one to one map */
2016    for (i=0; i<sizeof(scr_map); i++)
2017	scr_map[i] = i;
2018}
2019
2020static scr_stat
2021*alloc_scp()
2022{
2023    scr_stat *scp;
2024
2025    scp = (scr_stat *)malloc(sizeof(scr_stat), M_DEVBUF, M_WAITOK);
2026    init_scp(scp);
2027    scp->scr_buf = scp->cursor_pos = scp->scr_buf = scp->mouse_pos =
2028	(u_short *)malloc(scp->xsize*scp->ysize*sizeof(u_short),
2029			  M_DEVBUF, M_WAITOK);
2030    scp->history_head = scp->history_pos = scp->history =
2031	(u_short *)malloc(scp->history_size*sizeof(u_short),
2032			  M_DEVBUF, M_WAITOK);
2033    bzero(scp->history_head, scp->history_size*sizeof(u_short));
2034    if (crtc_vga && video_mode_ptr)
2035	set_mode(scp);
2036    clear_screen(scp);
2037    return scp;
2038}
2039
2040static void
2041init_scp(scr_stat *scp)
2042{
2043    scp->mode = M_VGA_C80x25;
2044    scp->font = FONT_16;
2045    scp->xsize = COL;
2046    scp->ysize = ROW;
2047    scp->start = COL * ROW;
2048    scp->end = 0;
2049    scp->term.esc = 0;
2050    scp->term.std_attr = current_default->std_attr;
2051    scp->term.rev_attr = current_default->rev_attr;
2052    scp->term.cur_attr = scp->term.std_attr;
2053    scp->border = BG_BLACK;
2054    scp->cursor_start = *(char *)pa_to_va(0x461);
2055    scp->cursor_end = *(char *)pa_to_va(0x460);
2056    scp->mouse_xpos = scp->mouse_ypos = 0;
2057    scp->bell_pitch = BELL_PITCH;
2058    scp->bell_duration = BELL_DURATION;
2059    scp->status = (*(char *)pa_to_va(0x417) & 0x20) ? NLKED : 0;
2060    scp->status |= CURSOR_ENABLED;
2061    scp->pid = 0;
2062    scp->proc = NULL;
2063    scp->smode.mode = VT_AUTO;
2064    scp->history_head = scp->history_pos = scp->history = NULL;
2065    scp->history_size = HISTORY_SIZE;
2066}
2067
2068static u_char
2069*get_fstr(u_int c, u_int *len)
2070{
2071    u_int i;
2072
2073    if (!(c & FKEY))
2074	return(NULL);
2075    i = (c & 0xFF) - F_FN;
2076    if (i > n_fkey_tab)
2077	return(NULL);
2078    *len = fkey_tab[i].len;
2079    return(fkey_tab[i].str);
2080}
2081
2082static void
2083update_leds(int which)
2084{
2085    int s;
2086    static u_char xlate_leds[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
2087
2088    /* replace CAPS led with ALTGR led for ALTGR keyboards */
2089    if (key_map.n_keys > ALTGR_OFFSET) {
2090	if (which & ALKED)
2091	    which |= CLKED;
2092	else
2093	    which &= ~CLKED;
2094    }
2095    s = spltty();
2096    kbd_cmd(KB_SETLEDS);
2097    kbd_cmd(xlate_leds[which & LED_MASK]);
2098    splx(s);
2099}
2100
2101static void
2102history_to_screen(scr_stat *scp)
2103{
2104    int i;
2105
2106    for (i=0; i<scp->ysize; i++)
2107	bcopyw(scp->history + (((scp->history_pos - scp->history) +
2108	       scp->history_size-((i+1)*scp->xsize))%scp->history_size),
2109	       scp->scr_buf + (scp->xsize * (scp->ysize-1 - i)),
2110	       scp->xsize * sizeof(u_short));
2111    mark_all(scp);
2112}
2113
2114static int
2115history_up_line(scr_stat *scp)
2116{
2117    if (WRAPHIST(scp, scp->history_pos, -(scp->xsize*scp->ysize)) !=
2118	scp->history_head) {
2119	scp->history_pos = WRAPHIST(scp, scp->history_pos, -scp->xsize);
2120	history_to_screen(scp);
2121	return 0;
2122    }
2123    else
2124	return -1;
2125}
2126
2127static int
2128history_down_line(scr_stat *scp)
2129{
2130    if (scp->history_pos != scp->history_head) {
2131	scp->history_pos = WRAPHIST(scp, scp->history_pos, scp->xsize);
2132	history_to_screen(scp);
2133	return 0;
2134    }
2135    else
2136	return -1;
2137}
2138
2139/*
2140 * scgetc(noblock) - get character from keyboard.
2141 * If noblock = 0 wait until a key is pressed.
2142 * Else return NOKEY.
2143 */
2144u_int
2145scgetc(int noblock)
2146{
2147    u_char scancode, keycode;
2148    u_int state, action;
2149    struct key_t *key;
2150    static u_char esc_flag = 0, compose = 0;
2151    static u_int chr = 0;
2152
2153next_code:
2154    kbd_wait();
2155    /* First see if there is something in the keyboard port */
2156    if (inb(KB_STAT) & KB_BUF_FULL)
2157	scancode = inb(KB_DATA);
2158    else if (noblock)
2159	return(NOKEY);
2160    else
2161	goto next_code;
2162
2163    if (cur_console->status & KBD_RAW_MODE)
2164	return scancode;
2165#if ASYNCH
2166    if (scancode == KB_ACK || scancode == KB_RESEND) {
2167	kbd_reply = scancode;
2168	if (noblock)
2169	    return(NOKEY);
2170	goto next_code;
2171    }
2172#endif
2173    keycode = scancode & 0x7F;
2174    switch (esc_flag) {
2175    case 0x00:      /* normal scancode */
2176	switch(scancode) {
2177	case 0xB8:  /* left alt  (compose key) */
2178	    if (compose) {
2179		compose = 0;
2180		if (chr > 255) {
2181		    do_bell(cur_console,
2182			BELL_PITCH, BELL_DURATION);
2183		    chr = 0;
2184		}
2185	    }
2186	    break;
2187	case 0x38:
2188	    if (!compose) {
2189		compose = 1;
2190		chr = 0;
2191	    }
2192	    break;
2193	case 0xE0:
2194	case 0xE1:
2195	    esc_flag = scancode;
2196	    goto next_code;
2197	}
2198	break;
2199    case 0xE0:      /* 0xE0 prefix */
2200	esc_flag = 0;
2201	switch (keycode) {
2202	case 0x1C:  /* right enter key */
2203	    keycode = 0x59;
2204	    break;
2205	case 0x1D:  /* right ctrl key */
2206	    keycode = 0x5A;
2207	    break;
2208	case 0x35:  /* keypad divide key */
2209	    keycode = 0x5B;
2210	    break;
2211	case 0x37:  /* print scrn key */
2212	    keycode = 0x5C;
2213	    break;
2214	case 0x38:  /* right alt key (alt gr) */
2215	    keycode = 0x5D;
2216	    break;
2217	case 0x47:  /* grey home key */
2218	    keycode = 0x5E;
2219	    break;
2220	case 0x48:  /* grey up arrow key */
2221	    keycode = 0x5F;
2222	    break;
2223	case 0x49:  /* grey page up key */
2224	    keycode = 0x60;
2225	    break;
2226	case 0x4B:  /* grey left arrow key */
2227	    keycode = 0x61;
2228	    break;
2229	case 0x4D:  /* grey right arrow key */
2230	    keycode = 0x62;
2231	    break;
2232	case 0x4F:  /* grey end key */
2233	    keycode = 0x63;
2234	    break;
2235	case 0x50:  /* grey down arrow key */
2236	    keycode = 0x64;
2237	    break;
2238	case 0x51:  /* grey page down key */
2239	    keycode = 0x65;
2240	    break;
2241	case 0x52:  /* grey insert key */
2242	    keycode = 0x66;
2243	    break;
2244	case 0x53:  /* grey delete key */
2245	    keycode = 0x67;
2246	    break;
2247
2248	/* the following 3 are only used on the MS "Natural" keyboard */
2249	case 0x5b:  /* left Window key */
2250	    keycode = 0x69;
2251	    break;
2252	case 0x5c:  /* right Window key */
2253	    keycode = 0x6a;
2254	    break;
2255	case 0x5d:  /* menu key */
2256	    keycode = 0x6b;
2257	    break;
2258	default:    /* ignore everything else */
2259	    goto next_code;
2260	}
2261	break;
2262    case 0xE1:      /* 0xE1 prefix */
2263	esc_flag = 0;
2264	if (keycode == 0x1D)
2265	    esc_flag = 0x1D;
2266	goto next_code;
2267	/* NOT REACHED */
2268    case 0x1D:      /* pause / break */
2269	esc_flag = 0;
2270	if (keycode != 0x45)
2271	    goto next_code;
2272	keycode = 0x68;
2273	break;
2274    }
2275
2276    /* if scroll-lock pressed allow history browsing */
2277    if (cur_console->history && cur_console->status & SLKED) {
2278	int i;
2279
2280	cur_console->status &= ~CURSOR_ENABLED;
2281	if (!(cur_console->status & BUFFER_SAVED)) {
2282	    cur_console->status |= BUFFER_SAVED;
2283	    cur_console->history_save = cur_console->history_head;
2284
2285	    /* copy screen into top of history buffer */
2286	    for (i=0; i<cur_console->ysize; i++) {
2287		bcopyw(cur_console->scr_buf + (cur_console->xsize * i),
2288		       cur_console->history_head,
2289		       cur_console->xsize * sizeof(u_short));
2290		cur_console->history_head += cur_console->xsize;
2291		if (cur_console->history_head + cur_console->xsize >
2292		    cur_console->history + cur_console->history_size)
2293		    cur_console->history_head=cur_console->history;
2294	    }
2295	    cur_console->history_pos = cur_console->history_head;
2296	    history_to_screen(cur_console);
2297	}
2298	switch (scancode) {
2299	case 0x47:  /* home key */
2300	    cur_console->history_pos = cur_console->history_head;
2301	    history_to_screen(cur_console);
2302	    goto next_code;
2303
2304	case 0x4F:  /* end key */
2305	    cur_console->history_pos =
2306		WRAPHIST(cur_console, cur_console->history_head,
2307			 cur_console->xsize*cur_console->ysize);
2308	    history_to_screen(cur_console);
2309	    goto next_code;
2310
2311	case 0x48:  /* up arrow key */
2312	    if (history_up_line(cur_console))
2313		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2314	    goto next_code;
2315
2316	case 0x50:  /* down arrow key */
2317	    if (history_down_line(cur_console))
2318		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2319	    goto next_code;
2320
2321	case 0x49:  /* page up key */
2322	    for (i=0; i<cur_console->ysize; i++)
2323	    if (history_up_line(cur_console)) {
2324		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2325		break;
2326	    }
2327	    goto next_code;
2328
2329	case 0x51:  /* page down key */
2330	    for (i=0; i<cur_console->ysize; i++)
2331	    if (history_down_line(cur_console)) {
2332		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2333		break;
2334	    }
2335	    goto next_code;
2336	}
2337    }
2338
2339    if (compose) {
2340	switch (scancode) {
2341	/* key pressed process it */
2342	case 0x47: case 0x48: case 0x49:    /* keypad 7,8,9 */
2343	    chr = (scancode - 0x40) + chr*10;
2344	    goto next_code;
2345	case 0x4B: case 0x4C: case 0x4D:    /* keypad 4,5,6 */
2346	    chr = (scancode - 0x47) + chr*10;
2347	    goto next_code;
2348	case 0x4F: case 0x50: case 0x51:    /* keypad 1,2,3 */
2349	    chr = (scancode - 0x4E) + chr*10;
2350	    goto next_code;
2351	case 0x52:              /* keypad 0 */
2352	    chr *= 10;
2353	    goto next_code;
2354
2355	/* key release, no interest here */
2356	case 0xC7: case 0xC8: case 0xC9:    /* keypad 7,8,9 */
2357	case 0xCB: case 0xCC: case 0xCD:    /* keypad 4,5,6 */
2358	case 0xCF: case 0xD0: case 0xD1:    /* keypad 1,2,3 */
2359	case 0xD2:              /* keypad 0 */
2360	    goto next_code;
2361
2362	case 0x38:              /* left alt key */
2363	    break;
2364	default:
2365	    if (chr) {
2366		compose = chr = 0;
2367		do_bell(cur_console, BELL_PITCH, BELL_DURATION);
2368		goto next_code;
2369	    }
2370	    break;
2371	}
2372    }
2373
2374    state = (shfts ? 1 : 0 ) | (2 * (ctls ? 1 : 0)) | (4 * (alts ? 1 : 0));
2375    if ((!agrs && (cur_console->status & ALKED))
2376	|| (agrs && !(cur_console->status & ALKED)))
2377	keycode += ALTGR_OFFSET;
2378    key = &key_map.key[keycode];
2379    if ( ((key->flgs & FLAG_LOCK_C) && (cur_console->status & CLKED))
2380	 || ((key->flgs & FLAG_LOCK_N) && (cur_console->status & NLKED)) )
2381	state ^= 1;
2382
2383    /* Check for make/break */
2384    action = key->map[state];
2385    if (scancode & 0x80) {      /* key released */
2386	if (key->spcl & 0x80) {
2387	    switch (action) {
2388	    case LSH:
2389		shfts &= ~1;
2390		break;
2391	    case RSH:
2392		shfts &= ~2;
2393		break;
2394	    case LCTR:
2395		ctls &= ~1;
2396		break;
2397	    case RCTR:
2398		ctls &= ~2;
2399		break;
2400	    case LALT:
2401		alts &= ~1;
2402		break;
2403	    case RALT:
2404		alts &= ~2;
2405		break;
2406	    case NLK:
2407		nlkcnt = 0;
2408		break;
2409	    case CLK:
2410		clkcnt = 0;
2411		break;
2412	    case SLK:
2413		slkcnt = 0;
2414		break;
2415	    case ASH:
2416		agrs = 0;
2417		break;
2418	    case ALK:
2419		alkcnt = 0;
2420		break;
2421	    case META:
2422		metas = 0;
2423		break;
2424	    }
2425	}
2426	if (chr && !compose) {
2427	    action = chr;
2428	    chr = 0;
2429	    return(action);
2430	}
2431    } else {
2432	/* key pressed */
2433	if (key->spcl & (0x80>>state)) {
2434	    switch (action) {
2435	    /* LOCKING KEYS */
2436	    case NLK:
2437		if (!nlkcnt) {
2438		    nlkcnt++;
2439		    if (cur_console->status & NLKED)
2440			cur_console->status &= ~NLKED;
2441		    else
2442			cur_console->status |= NLKED;
2443		    update_leds(cur_console->status);
2444		}
2445		break;
2446	    case CLK:
2447		if (!clkcnt) {
2448		    clkcnt++;
2449		    if (cur_console->status & CLKED)
2450			cur_console->status &= ~CLKED;
2451		    else
2452			cur_console->status |= CLKED;
2453		    update_leds(cur_console->status);
2454		}
2455		break;
2456	    case SLK:
2457		if (!slkcnt) {
2458		    slkcnt++;
2459		    if (cur_console->status & SLKED) {
2460			cur_console->status &= ~SLKED;
2461			if (cur_console->status & BUFFER_SAVED){
2462			    int i;
2463			    u_short *ptr = cur_console->history_save;
2464
2465			    for (i=0; i<cur_console->ysize; i++) {
2466				bcopyw(ptr,
2467				       cur_console->scr_buf +
2468				       (cur_console->xsize*i),
2469				       cur_console->xsize * sizeof(u_short));
2470				ptr += cur_console->xsize;
2471				if (ptr + cur_console->xsize >
2472				    cur_console->history +
2473				    cur_console->history_size)
2474				    ptr = cur_console->history;
2475			    }
2476			    cur_console->status &= ~BUFFER_SAVED;
2477			    cur_console->history_head=cur_console->history_save;
2478			    cur_console->status |= CURSOR_ENABLED;
2479			    mark_all(cur_console);
2480			}
2481			scstart(VIRTUAL_TTY(get_scr_num()));
2482		    }
2483		    else
2484			cur_console->status |= SLKED;
2485		    update_leds(cur_console->status);
2486		}
2487		break;
2488	    case ALK:
2489		if (!alkcnt) {
2490		    alkcnt++;
2491		    if (cur_console->status & ALKED)
2492			cur_console->status &= ~ALKED;
2493		    else
2494			cur_console->status |= ALKED;
2495		    update_leds(cur_console->status);
2496		}
2497		break;
2498
2499	    /* NON-LOCKING KEYS */
2500	    case NOP:
2501		break;
2502	    case RBT:
2503		shutdown_nice();
2504		break;
2505	    case SUSP:
2506#if NAPM > 0
2507		apm_suspend();
2508#endif
2509		break;
2510
2511	    case DBG:
2512#ifdef DDB          /* try to switch to console 0 */
2513		if (cur_console->smode.mode == VT_AUTO &&
2514		    console[0]->smode.mode == VT_AUTO)
2515		    switch_scr(cur_console, 0);
2516		Debugger("manual escape to debugger");
2517		return(NOKEY);
2518#else
2519		printf("No debugger in kernel\n");
2520#endif
2521		break;
2522	    case LSH:
2523		shfts |= 1;
2524		break;
2525	    case RSH:
2526		shfts |= 2;
2527		break;
2528	    case LCTR:
2529		ctls |= 1;
2530		break;
2531	    case RCTR:
2532		ctls |= 2;
2533		break;
2534	    case LALT:
2535		alts |= 1;
2536		break;
2537	    case RALT:
2538		alts |= 2;
2539		break;
2540	    case ASH:
2541		agrs = 1;
2542		break;
2543	    case META:
2544		metas = 1;
2545		break;
2546	    case NEXT:
2547		switch_scr(cur_console, (get_scr_num() + 1) % MAXCONS);
2548		break;
2549	    case BTAB:
2550		return(BKEY);
2551	    default:
2552		if (action >= F_SCR && action <= L_SCR) {
2553		    switch_scr(cur_console, action - F_SCR);
2554		    break;
2555		}
2556		if (action >= F_FN && action <= L_FN)
2557		    action |= FKEY;
2558		return(action);
2559	    }
2560	}
2561	else {
2562	    if (metas)
2563		action |= MKEY;
2564	    return(action);
2565	}
2566    }
2567    goto next_code;
2568}
2569
2570int
2571scmmap(dev_t dev, int offset, int nprot)
2572{
2573    if (offset > 0x20000 - PAGE_SIZE)
2574	return -1;
2575    return i386_btop((VIDEOMEM + offset));
2576}
2577
2578static void
2579kbd_wait(void)
2580{
2581    int i = 1000;
2582
2583    while (i--) {
2584	if ((inb(KB_STAT) & KB_READY) == 0)
2585	    break;
2586	DELAY (10);
2587    }
2588}
2589
2590static void
2591kbd_cmd(u_char command)
2592{
2593    int retry = 5;
2594    do {
2595	int i = 100000;
2596
2597	kbd_wait();
2598#if ASYNCH
2599	kbd_reply = 0;
2600	outb(KB_DATA, command);
2601	while (i--) {
2602	    if (kbd_reply == KB_ACK)
2603		return;
2604	    if (kbd_reply == KB_RESEND)
2605		break;
2606	}
2607#else
2608	outb(KB_DATA, command);
2609	while (i--) {
2610	    if (inb(KB_STAT) & KB_BUF_FULL) {
2611		int val;
2612		DELAY(10);
2613		val = inb(KB_DATA);
2614		if (val == KB_ACK)
2615		    return;
2616		if (val == KB_RESEND)
2617		    break;
2618	    }
2619	}
2620#endif
2621    } while (retry--);
2622}
2623
2624static void
2625set_mode(scr_stat *scp)
2626{
2627    char *modetable;
2628    char special_modetable[64];
2629    int mode, font_size;
2630
2631    if (scp != cur_console)
2632	return;
2633
2634    /* setup video hardware for the given mode */
2635    switch (scp->mode) {
2636    case M_VGA_M80x60:
2637	bcopyw(video_mode_ptr+(64*M_VGA_M80x25),&special_modetable, 64);
2638	goto special_80x60;
2639
2640    case M_VGA_C80x60:
2641	bcopyw(video_mode_ptr+(64*M_VGA_C80x25),&special_modetable, 64);
2642special_80x60:
2643	special_modetable[2]  = 0x08;
2644	special_modetable[19] = 0x47;
2645	goto special_480l;
2646
2647    case M_VGA_M80x30:
2648	bcopyw(video_mode_ptr+(64*M_VGA_M80x25),&special_modetable, 64);
2649	goto special_80x30;
2650
2651    case M_VGA_C80x30:
2652	bcopyw(video_mode_ptr+(64*M_VGA_C80x25),&special_modetable, 64);
2653special_80x30:
2654	special_modetable[19] = 0x4f;
2655special_480l:
2656	special_modetable[9] |= 0xc0;
2657	special_modetable[16] = 0x08;
2658	special_modetable[17] = 0x3e;
2659	special_modetable[26] = 0xea;
2660	special_modetable[28] = 0xdf;
2661	special_modetable[31] = 0xe7;
2662	special_modetable[32] = 0x04;
2663	modetable = special_modetable;
2664	goto setup_mode;
2665
2666    case M_ENH_B80x43:
2667	bcopyw(video_mode_ptr+(64*M_ENH_B80x25),&special_modetable, 64);
2668	goto special_80x43;
2669
2670    case M_ENH_C80x43:
2671	bcopyw(video_mode_ptr+(64*M_ENH_C80x25),&special_modetable, 64);
2672special_80x43:
2673	special_modetable[28] = 87;
2674	goto special_80x50;
2675
2676    case M_VGA_M80x50:
2677	bcopyw(video_mode_ptr+(64*M_VGA_M80x25),&special_modetable, 64);
2678	goto special_80x50;
2679
2680    case M_VGA_C80x50:
2681	bcopyw(video_mode_ptr+(64*M_VGA_C80x25),&special_modetable, 64);
2682special_80x50:
2683	special_modetable[2] = 8;
2684	special_modetable[19] = 7;
2685	modetable = special_modetable;
2686	goto setup_mode;
2687
2688    case M_VGA_C40x25: case M_VGA_C80x25:
2689    case M_VGA_M80x25:
2690    case M_B40x25:     case M_C40x25:
2691    case M_B80x25:     case M_C80x25:
2692    case M_ENH_B40x25: case M_ENH_C40x25:
2693    case M_ENH_B80x25: case M_ENH_C80x25:
2694
2695	modetable = video_mode_ptr + (scp->mode * 64);
2696setup_mode:
2697	set_vgaregs(modetable);
2698	font_size = *(modetable + 2);
2699
2700	/* set font type (size) */
2701	switch (font_size) {
2702	case 0x10:
2703	    outb(TSIDX, 0x03); outb(TSREG, 0x00);   /* font 0 */
2704	    scp->font = FONT_16;
2705	    break;
2706	case 0x0E:
2707	    outb(TSIDX, 0x03); outb(TSREG, 0x05);   /* font 1 */
2708	    scp->font = FONT_14;
2709	    break;
2710	default:
2711	case 0x08:
2712	    outb(TSIDX, 0x03); outb(TSREG, 0x0A);   /* font 2 */
2713	    scp->font = FONT_8;
2714	    break;
2715	}
2716	if (configuration & CHAR_CURSOR)
2717	    set_destructive_cursor(scp, TRUE);
2718	break;
2719
2720    case M_BG320:     case M_CG320:     case M_BG640:
2721    case M_CG320_D:   case M_CG640_E:
2722    case M_CG640x350: case M_ENH_CG640:
2723    case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
2724
2725	set_vgaregs(video_mode_ptr + (scp->mode * 64));
2726	break;
2727
2728    default:
2729	/* call user defined function XXX */
2730	break;
2731    }
2732
2733    /* set border color for this (virtual) console */
2734    set_border(scp->border);
2735    return;
2736}
2737
2738void
2739set_border(int color)
2740{
2741    inb(crtc_addr+6);               /* reset flip-flop */
2742    outb(ATC, 0x11); outb(ATC, color);
2743    inb(crtc_addr+6);               /* reset flip-flop */
2744    outb(ATC, 0x20);                /* enable Palette */
2745}
2746
2747static void
2748set_vgaregs(char *modetable)
2749{
2750    int i, s = splhigh();
2751
2752    outb(TSIDX, 0x00); outb(TSREG, 0x01);   	/* stop sequencer */
2753    outb(TSIDX, 0x07); outb(TSREG, 0x00);   	/* unlock registers */
2754    for (i=0; i<4; i++) {           		/* program sequencer */
2755	outb(TSIDX, i+1);
2756	outb(TSREG, modetable[i+5]);
2757    }
2758    outb(MISC, modetable[9]);       		/* set dot-clock */
2759    outb(TSIDX, 0x00); outb(TSREG, 0x03);   	/* start sequencer */
2760    outb(crtc_addr, 0x11);
2761    outb(crtc_addr+1, inb(crtc_addr+1) & 0x7F);
2762    for (i=0; i<25; i++) {          		/* program crtc */
2763	outb(crtc_addr, i);
2764	if (i == 14 || i == 15)     		/* no hardware cursor */
2765	    outb(crtc_addr+1, 0xff);
2766	else
2767	    outb(crtc_addr+1, modetable[i+10]);
2768    }
2769    inb(crtc_addr+6);           		/* reset flip-flop */
2770    for (i=0; i<20; i++) {          		/* program attribute ctrl */
2771	outb(ATC, i);
2772	outb(ATC, modetable[i+35]);
2773    }
2774    for (i=0; i<9; i++) {           		/* program graph data ctrl */
2775	outb(GDCIDX, i);
2776	outb(GDCREG, modetable[i+55]);
2777    }
2778    inb(crtc_addr+6);           		/* reset flip-flop */
2779    outb(ATC ,0x20);            		/* enable palette */
2780    splx(s);
2781}
2782
2783static void
2784set_font_mode()
2785{
2786    /* setup vga for loading fonts (graphics plane mode) */
2787    inb(crtc_addr+6);
2788    outb(ATC, 0x30); outb(ATC, 0x01);
2789#if SLOW_VGA
2790    outb(TSIDX, 0x02); outb(TSREG, 0x04);
2791    outb(TSIDX, 0x04); outb(TSREG, 0x06);
2792    outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
2793    outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
2794    outb(GDCIDX, 0x06); outb(GDCREG, 0x05);
2795#else
2796    outw(TSIDX, 0x0402);
2797    outw(TSIDX, 0x0604);
2798    outw(GDCIDX, 0x0204);
2799    outw(GDCIDX, 0x0005);
2800    outw(GDCIDX, 0x0506);               /* addr = a0000, 64kb */
2801#endif
2802}
2803
2804static void
2805set_normal_mode()
2806{
2807    int s = splhigh();
2808
2809    /* setup vga for normal operation mode again */
2810    inb(crtc_addr+6);
2811    outb(ATC, 0x30); outb(ATC, 0x0C);
2812#if SLOW_VGA
2813    outb(TSIDX, 0x02); outb(TSREG, 0x03);
2814    outb(TSIDX, 0x04); outb(TSREG, 0x02);
2815    outb(GDCIDX, 0x04); outb(GDCREG, 0x00);
2816    outb(GDCIDX, 0x05); outb(GDCREG, 0x10);
2817    if (crtc_addr == MONO_BASE) {
2818	outb(GDCIDX, 0x06); outb(GDCREG, 0x0A); /* addr = b0000, 32kb */
2819    }
2820    else {
2821	outb(GDCIDX, 0x06); outb(GDCREG, 0x0E); /* addr = b8000, 32kb */
2822    }
2823#else
2824    outw(TSIDX, 0x0302);
2825    outw(TSIDX, 0x0204);
2826    outw(GDCIDX, 0x0004);
2827    outw(GDCIDX, 0x1005);
2828    if (crtc_addr == MONO_BASE)
2829	outw(GDCIDX, 0x0A06);           /* addr = b0000, 32kb */
2830    else
2831	outw(GDCIDX, 0x0E06);           /* addr = b8000, 32kb */
2832#endif
2833    splx(s);
2834}
2835
2836static void
2837copy_font(int operation, int font_type, char* font_image)
2838{
2839    int ch, line, segment, fontsize;
2840    u_char val;
2841
2842    switch (font_type) {
2843    default:
2844    case FONT_8:
2845	segment = 0x8000;
2846	fontsize = 8;
2847	break;
2848    case FONT_14:
2849	segment = 0x4000;
2850	fontsize = 14;
2851	break;
2852    case FONT_16:
2853	segment = 0x0000;
2854	fontsize = 16;
2855	break;
2856    }
2857    outb(TSIDX, 0x01); val = inb(TSREG);        /* disable screen */
2858    outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
2859    set_font_mode();
2860    for (ch=0; ch < 256; ch++)
2861	for (line=0; line < fontsize; line++)
2862	if (operation)
2863	    *(char *)pa_to_va(VIDEOMEM+(segment)+(ch*32)+line) =
2864		    font_image[(ch*fontsize)+line];
2865	else
2866	    font_image[(ch*fontsize)+line] =
2867	    *(char *)pa_to_va(VIDEOMEM+(segment)+(ch*32)+line);
2868    set_normal_mode();
2869    outb(TSIDX, 0x01); outb(TSREG, val & 0xDF); /* enable screen */
2870}
2871
2872static void
2873set_destructive_cursor(scr_stat *scp, int force)
2874{
2875    u_char cursor[32];
2876    caddr_t address;
2877    int i, font_size;
2878    char *font_buffer;
2879    static u_char old_saveunder = DEAD_CHAR;
2880
2881    if (!force && (scp->cursor_saveunder & 0xFF) == old_saveunder)
2882	return;
2883    old_saveunder = force ? DEAD_CHAR : scp->cursor_saveunder & 0xFF;
2884    switch (scp->font) {
2885    default:
2886    case FONT_8:
2887	font_size = 8;
2888	font_buffer = font_8;
2889	address = (caddr_t)VIDEOMEM + 0x8000;
2890	break;
2891    case FONT_14:
2892	font_size = 14;
2893	font_buffer = font_14;
2894	address = (caddr_t)VIDEOMEM + 0x4000;
2895	break;
2896    case FONT_16:
2897	font_size = 16;
2898	font_buffer = font_16;
2899	address = (caddr_t)VIDEOMEM;
2900	break;
2901    }
2902    bcopyw(font_buffer + ((scp->cursor_saveunder & 0xff) * font_size),
2903	   cursor, font_size);
2904    for (i=0; i<32; i++)
2905	if ((i >= scp->cursor_start && i <= scp->cursor_end) ||
2906	    (scp->cursor_start >= font_size && i == font_size - 1))
2907	    cursor[i] |= 0xff;
2908    while (!(inb(crtc_addr+6) & 0x08)) /* wait for vertical retrace */ ;
2909    set_font_mode();
2910    bcopy(cursor, (char *)pa_to_va(address) + DEAD_CHAR * 32, 32);
2911    set_normal_mode();
2912}
2913
2914static void
2915draw_mouse_image(scr_stat *scp)
2916{
2917    caddr_t address;
2918    int i, font_size;
2919    char *font_buffer;
2920    u_short buffer[32];
2921    u_short xoffset, yoffset;
2922    u_short *crt_pos = Crtat + (scp->mouse_pos - scp->scr_buf);
2923
2924    xoffset = scp->mouse_xpos % 8;
2925    switch (scp->font) {
2926    default:
2927    case FONT_8:
2928	font_size = 8;
2929	font_buffer = font_8;
2930	yoffset = scp->mouse_ypos % 8;
2931	address = (caddr_t)VIDEOMEM + 0x8000;
2932	break;
2933    case FONT_14:
2934	font_size = 14;
2935	font_buffer = font_14;
2936	yoffset = scp->mouse_ypos % 14;
2937	address = (caddr_t)VIDEOMEM + 0x4000;
2938	break;
2939    case FONT_16:
2940	font_size = 16;
2941	font_buffer = font_16;
2942	yoffset = scp->mouse_ypos % 16;
2943	address = (caddr_t)VIDEOMEM;
2944	break;
2945    }
2946
2947    bcopyw(font_buffer + ((*(scp->mouse_pos) & 0xff) * font_size),
2948	   &scp->mouse_cursor[0], font_size);
2949    bcopyw(font_buffer + ((*(scp->mouse_pos+1) & 0xff) * font_size),
2950	   &scp->mouse_cursor[32], font_size);
2951    bcopyw(font_buffer + ((*(scp->mouse_pos+scp->xsize) & 0xff) * font_size),
2952	   &scp->mouse_cursor[64], font_size);
2953    bcopyw(font_buffer + ((*(scp->mouse_pos+scp->xsize+1) & 0xff) * font_size),
2954	   &scp->mouse_cursor[96], font_size);
2955
2956    for (i=0; i<font_size; i++) {
2957	buffer[i] = scp->mouse_cursor[i]<<8 | scp->mouse_cursor[i+32];
2958	buffer[i+font_size]=scp->mouse_cursor[i+64]<<8|scp->mouse_cursor[i+96];
2959    }
2960    for (i=0; i<16; i++) {
2961	buffer[i+yoffset] =
2962	    ( buffer[i+yoffset] & ~(mouse_and_mask[i] >> xoffset))
2963	    | (mouse_or_mask[i] >> xoffset);
2964    }
2965    for (i=0; i<font_size; i++) {
2966	scp->mouse_cursor[i] = (buffer[i] & 0xff00) >> 8;
2967	scp->mouse_cursor[i+32] = buffer[i] & 0xff;
2968	scp->mouse_cursor[i+64] = (buffer[i+font_size] & 0xff00) >> 8;
2969	scp->mouse_cursor[i+96] = buffer[i+font_size] & 0xff;
2970    }
2971    if (scp->status & UPDATE_MOUSE) {
2972	u_short *ptr = scp->scr_buf + (scp->mouse_oldpos - Crtat);
2973
2974	if (crt_pos != scp->mouse_oldpos) {
2975	    *(scp->mouse_oldpos) = scp->mouse_saveunder[0];
2976	    *(scp->mouse_oldpos+1) = scp->mouse_saveunder[1];
2977	    *(scp->mouse_oldpos+scp->xsize) = scp->mouse_saveunder[2];
2978	    *(scp->mouse_oldpos+scp->xsize+1) = scp->mouse_saveunder[3];
2979	}
2980	scp->mouse_saveunder[0] = *(scp->mouse_pos);
2981	scp->mouse_saveunder[1] = *(scp->mouse_pos+1);
2982	scp->mouse_saveunder[2] = *(scp->mouse_pos+scp->xsize);
2983	scp->mouse_saveunder[3] = *(scp->mouse_pos+scp->xsize+1);
2984	if ((scp->cursor_pos == (ptr)) ||
2985	    (scp->cursor_pos == (ptr+1)) ||
2986	    (scp->cursor_pos == (ptr+scp->xsize)) ||
2987	    (scp->cursor_pos == (ptr+scp->xsize+1)) ||
2988	    (scp->cursor_pos == (scp->mouse_pos)) ||
2989	    (scp->cursor_pos == (scp->mouse_pos+1)) ||
2990	    (scp->cursor_pos == (scp->mouse_pos+scp->xsize)) ||
2991	    (scp->cursor_pos == (scp->mouse_pos+scp->xsize+1)))
2992	    scp->status &= ~CURSOR_SHOWN;
2993    }
2994    scp->mouse_oldpos = crt_pos;
2995    while (!(inb(crtc_addr+6) & 0x08)) /* wait for vertical retrace */ ;
2996    *(crt_pos) = *(scp->mouse_pos)&0xff00|0xd0;
2997    *(crt_pos+1) = *(scp->mouse_pos+1)&0xff00|0xd1;
2998    *(crt_pos+scp->xsize) = *(scp->mouse_pos+scp->xsize)&0xff00|0xd2;
2999    *(crt_pos+scp->xsize+1) = *(scp->mouse_pos+scp->xsize+1)&0xff00|0xd3;
3000    set_font_mode();
3001    bcopy(scp->mouse_cursor, (char *)pa_to_va(address) + 0xd0 * 32, 128);
3002    set_normal_mode();
3003}
3004
3005static void
3006save_palette(void)
3007{
3008    int i;
3009
3010    outb(PALRADR, 0x00);
3011    for (i=0x00; i<0x300; i++)
3012	palette[i] = inb(PALDATA);
3013    inb(crtc_addr+6);           /* reset flip/flop */
3014}
3015
3016void
3017load_palette(void)
3018{
3019    int i;
3020
3021    outb(PIXMASK, 0xFF);            /* no pixelmask */
3022    outb(PALWADR, 0x00);
3023    for (i=0x00; i<0x300; i++)
3024	 outb(PALDATA, palette[i]);
3025    inb(crtc_addr+6);           /* reset flip/flop */
3026    outb(ATC, 0x20);            /* enable palette */
3027}
3028
3029static void
3030do_bell(scr_stat *scp, int pitch, int duration)
3031{
3032    if (scp == cur_console) {
3033	if (configuration & VISUAL_BELL) {
3034	    if (blink_in_progress)
3035		return;
3036	    blink_in_progress = 4;
3037	    blink_screen(scp);
3038	    timeout((timeout_func_t)blink_screen, scp, hz/10);
3039	}
3040	else
3041	    sysbeep(pitch, duration);
3042    }
3043}
3044
3045static void
3046blink_screen(scr_stat *scp)
3047{
3048    if (blink_in_progress > 1) {
3049	if (blink_in_progress & 1)
3050	    fillw(kernel_default.std_attr | scr_map[0x20],
3051		  Crtat, scp->xsize * scp->ysize);
3052	else
3053	    fillw(kernel_default.rev_attr | scr_map[0x20],
3054		  Crtat, scp->xsize * scp->ysize);
3055	blink_in_progress--;
3056	timeout((timeout_func_t)blink_screen, scp, hz/10);
3057    }
3058    else {
3059	blink_in_progress = FALSE;
3060    	mark_all(scp);
3061	if (delayed_next_scr)
3062	    switch_scr(scp, delayed_next_scr - 1);
3063    }
3064}
3065
3066#endif /* NSC */
3067