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coherent
/*
* Keyboard/display driver for German keyboard.
* Coherent, IBM PC/XT/AT (286 and 386).
*/
#include <sys/coherent.h>
#ifdef _I386
#include <sys/reg.h>
#else
#include <sys/i8086.h>
#endif
#include <sys/con.h>
#include <sys/devices.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/tty.h>
#include <signal.h>
#include <sys/sched.h>
#include <sys/silo.h>
#define SPC 0376 /* Special encoding */
#define XXX 0377 /* Non-character */
#define KBDATA 0x60 /* Keyboard data */
#define KBCTRL 0x61 /* Keyboard control */
#define KBFLAG 0x80 /* Keyboard reset flag */
#define LEDCMD 0xED /* status indicator command */
#define KBACK 0xFA /* status indicator acknowledge */
#define EXTENDED0 0xE0 /* extended key seq initiator */
#define EXTENDED1 0xE1 /* extended key seq initiator */
#define KEYUP 0x80 /* Key up change */
#define KEYSC 0x7F /* Key scan code mask */
#define LSHIFT 0x2A-1 /* Left shift key */
#define LSHIFTA 0x2B-1 /* Alternate left-shift key */
#define RSHIFT 0x36-1 /* Right shift key */
#define CTRL 0x1D-1 /* Control key */
/*-- #define CAPLOCK 0x1D-1 --*/ /* Control key */
#define ALT 0x38-1 /* Alt key or ALT GR */
#define CAPLOCK 0x3A-1 /* Caps lock key */
/*-- #define CTRL 0x3A-1 --*/ /* Caps lock key */
#define NUMLOCK 0x45-1 /* Numeric lock key */
#define DELETE 0x53-1 /* Del, as in CTRL-ALT-DEL */
#define BACKSP 0x0E-1 /* Back space */
#define SCRLOCK 0x46-1 /* Scroll lock */
/* Shift flags */
#define SRS 0x01 /* Right shift key on */
#define SLS 0x02 /* Left shift key on */
#define CTS 0x04 /* Ctrl key on */
#define ALS 0x08 /* Alt key on */
#define CPLS 0x10 /* Caps lock on */
#define NMLS 0x20 /* Num lock on */
#define AKPS 0x40 /* Alternate keypad shift */
#define SHFT 0x80 /* Shift key flag */
#define AGS 0x100 /* Alt Graphics on */
/* Function key information */
#define NFKEY 20 /* Number of settable functions */
#define NFCHAR 150 /* Number of characters settable */
#define NFBUF (NFKEY*2+NFCHAR+1) /* Size of buffer */
/*
* Functions.
*/
int isrint();
int istime();
void isbatch();
int mmstart();
int isopen();
int isclose();
int isread();
int mmwrite();
int isioctl();
void mmwatch();
int isload();
int isuload();
int ispoll();
int nulldev();
int nonedev();
/*
* Configuration table.
*/
CON iscon ={
DFCHR|DFPOL, /* Flags */
KB_MAJOR, /* Major index */
isopen, /* Open */
isclose, /* Close */
nulldev, /* Block */
isread, /* Read */
mmwrite, /* Write */
isioctl, /* Ioctl */
nulldev, /* Powerfail */
mmwatch, /* Timeout */
isload, /* Load */
isuload, /* Unload */
ispoll /* Poll */
};
/*
* Flag indicating turbo machine.
*/
int isturbo = 0;
/*
* Terminal structure.
*/
TTY istty = {
{0}, {0}, 0, mmstart, NULL, 0, 0
};
static silo_t in_silo;
/*
* State variables.
*/
int islock; /* Keyboard locked flag */
int isbusy; /* Raw input conversion busy */
static short shift; /* Overall shift state */
static char scroll; /* Scroll lock state */
static char lshift = LSHIFT; /* Left shift alternate state */
static char isfbuf[NFBUF]; /* Function key values */
static char *isfval[NFKEY]; /* Function key string pointers */
static int ledcmd; /* LED update command flag */
static int extended; /* extended key scan count */
static char extmode; /* use extended mode for this key */
static char ext0seen; /* 0xE0 prefix seen */
/*
* Tables for converting key code to ASCII.
* lmaptab specifies unshifted conversion,
* umaptab specifies shifted conversion,
* smaptab specifies the shift states which are active.
* An entry of XXX says the key is dead.
* An entry of SPC requires further processing.
*
* Key codes:
* ESC .. <- == 1 .. 14
* -> .. \n == 15 .. 28
* CTRL .. ` == 29 .. 41
* ^Shift .. PrtSc == 42 .. 55
* ALT .. CapsLock == 56 .. 58
* F1 .. F10 == 59 .. 68
* NumLock .. Del == 69 .. 83
* ISO, F11, F12 == 86 .. 88
*/
unsigned char agmaptab[] ={ /* Alt Gr */
XXX, XXX,'\375','\374',XXX, XXX, XXX, /* 1 - 7 */
'{', '[', ']', '}', '\\', XXX, XXX, XXX, /* 8 - 15 */
'@', XXX, XXX, XXX, XXX, XXX, XXX, XXX, /* 16 - 23 */
XXX, XXX, XXX, '~', XXX, XXX, XXX, XXX, /* 24 - 31 */
XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, /* 32 - 39 */
XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, /* 40 - 47 */
XXX, XXX,'\346', XXX, XXX, XXX, XXX, XXX, /* 48 - 55 */
XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, /* 56 - 63 */
XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, /* 64 - 71 */
XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, /* 72 - 79 */
XXX, XXX, XXX, XXX, XXX, XXX, '|', XXX, /* 80 - 87 */
XXX /* 88 */
};
static unsigned char lmaptab[] ={
'\33', '1', '2', '3', '4', '5', '6', /* 1 - 7 */
'7', '8', '9', '0','\341','\'', '\b', '\t', /* 8 - 15 */
'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* 16 - 23 */
'o', 'p','\201', '+', '\r', XXX, 'a', 's', /* 24 - 31 */
'd', 'f', 'g', 'h', 'j', 'k', 'l','\224', /* 32 - 39 */
'\204','^', XXX, '#', 'y', 'x', 'c', 'v', /* 40 - 47 */
'b', 'n', 'm', ',', '.', SPC, XXX, SPC, /* 48 - 55 */
XXX, ' ', XXX, SPC, SPC, SPC, SPC, SPC, /* 56 - 63 */
SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC, /* 64 - 71 */
SPC, SPC, '-', SPC, SPC, SPC, '+', SPC, /* 72 - 79 */
SPC, SPC, SPC, SPC, XXX, XXX, '<', XXX, /* 80 - 87 */
XXX /* 88 */
};
static unsigned char umaptab[] ={
'\33', '!', '"','\025', '$', '%', '&', /* 1 - 7 */
'/', '(', ')', '=', '?', '`', '\b', SPC, /* 8 - 15 */
'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* 16 - 23 */
'O', 'P','\232', '*', '\r', XXX, 'A', 'S', /* 24 - 31 */
'D', 'F', 'G', 'H', 'J', 'K', 'L','\231', /* 32 - 39 */
'\216','\370',XXX,'\'', 'Y', 'X', 'C', 'V', /* 40 - 47 */
'B', 'N', 'M', ';', ':', SPC, XXX, SPC, /* 48 - 55 */
XXX, ' ', XXX, SPC, SPC, SPC, SPC, SPC, /* 56 - 63 */
SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC, /* 64 - 71 */
SPC, SPC, '-', SPC, SPC, SPC, '+', SPC, /* 72 - 79 */
SPC, SPC, SPC, SPC, XXX, XXX, '>', XXX, /* 80 - 87 */
XXX /* 88 */
};
#define SS0 0 /* No shift */
#define SS1 (SLS|SRS|CTS) /* Shift, Ctrl */
#define SES (SLS|SRS) /* Shift */
#define LET (SLS|SRS|CPLS|CTS) /* Shift, Caps, Ctrl */
#define KEY (SLS|SRS|NMLS|AKPS) /* Shift, Num, Alt keypad */
static unsigned char smaptab[] ={
SS0, SES, SS1, SES, SES, SES, SS1, /* 1 - 7 */
SES, SES, SES, SES, SS1, SES, CTS, SES, /* 8 - 15 */
LET, LET, LET, LET, LET, LET, LET, LET, /* 16 - 23 */
LET, LET, SS1, SS1, CTS, SHFT, LET, LET, /* 24 - 31 */
LET, LET, LET, LET, LET, LET, LET, SES, /* 32 - 39 */
SES, SS1, SHFT, SS1, LET, LET, LET, LET, /* 40 - 47 */
LET, LET, LET, SES, SES, SES, SHFT, SES, /* 48 - 55 */
SHFT, SS1, SHFT, SS0, SS0, SS0, SS0, SS0, /* 56 - 63 */
SS0, SS0, SS0, SS0, SS0, SHFT, KEY, KEY, /* 64 - 71 */
KEY, KEY, SS0, KEY, KEY, KEY, SS0, KEY, /* 72 - 79 */
KEY, KEY, KEY, KEY, SS0, SS0, SES, SS0, /* 80 - 87 */
SS0
};
/*
* Load entry point.
* Do reset the keyboard because it gets terribly munged
* if you type during the boot.
*/
isload()
{
register short i;/* was: int i .. the loop below is hardly portable */
/*
* Reset keyboard if NOT an XT turbo.
*/
if ( ! isturbo ) {
outb(KBCTRL, 0x0C); /* Clock low */
for (i = 10582; --i >= 0; ); /* For 20ms */
outb(KBCTRL, 0xCC); /* Clock high */
for (i = 0; --i != 0; )
;
i = inb(KBDATA);
outb(KBCTRL, 0xCC); /* Clear keyboard */
outb(KBCTRL, 0x4D); /* Enable keyboard */
}
/*
* Enable mmwatch() invocation every second.
*/
drvl[KB_MAJOR].d_time = 1;
/*
* Seize keyboard interrupt.
*/
setivec(1, isrint);
/*
* Initialize video display.
*/
mmstart( &istty );
}
/*
* Unload entry point.
*/
isuload()
{
clrivec(1);
}
/*
* Default function key strings (terminated by -1 [\377])
*/
static char *deffuncs[] = {
"\33[1x\377", /* F1 */
"\33[2x\377", /* F2 */
"\33[3x\377", /* F3 */
"\33[4x\377", /* F4 */
"\33[5x\377", /* F5 */
"\33[6x\377", /* F6 */
"\33[7x\377", /* F7 */
"\33[8x\377", /* F8 */
"\33[9x\377", /* F9 */
"\33[0x\377", /* F10 - historical value */
"\33[1y\377", /* F11 */
"\33[2y\377", /* F12 */
"\33[3y\377", /* F13 */
"\33[4y\377", /* F14 */
"\33[5y\377", /* F15 */
"\33[6y\377", /* F16 */
"\33[7y\377", /* F17 */
"\33[8y\377", /* F18 */
"\33[9y\377", /* F19 */
"\33[0y\377" /* F20 */
};
/*
* Open routine.
*/
isopen(dev, mode)
dev_t dev;
unsigned int mode;
{
register int s;
if (minor(dev) != 0) {
u.u_error = ENXIO;
return;
}
if ((istty.t_flags&T_EXCL)!=0 && super()==0) {
u.u_error = ENODEV;
return;
}
ttsetgrp(&istty, dev, mode);
s = sphi();
if (istty.t_open++ == 0)
{ initkeys(); /* init function keys */
istty.t_flags = T_CARR; /* indicate "carrier" */
ttopen(&istty);
}
spl(s);
updleds(); /* update keyboard status LEDS */
}
/* Init function keys */
initkeys()
{ register int i;
register char *cp1, *cp2;
for (i=0; i<NFKEY; i++)
isfval[i] = 0; /* clear function key buffer */
cp2 = isfbuf; /* pointer to key buffer */
for (i=0; i<NFKEY; i++)
{ isfval[i] = cp2; /* save pointer to key string */
cp1 = deffuncs[i]; /* get init string pointer */
while ((*cp2++ = *cp1++) != -1) /* copy key data */
if (cp2 >= &isfbuf[NFBUF-3]) /* overflow? */
return;
}
}
/*
* Close a tty.
*/
isclose(dev)
{
register int s;
s = sphi();
if (--istty.t_open == 0)
{ s = sphi();
ttclose(&istty);
spl(s);
}
}
/*
* Read routine.
*/
isread(dev, iop)
dev_t dev;
IO *iop;
{
ttread(&istty, iop, 0);
if (istty.t_oq.cq_cc)
mmtime(&istty);
}
/*
* Ioctl routine.
*/
isioctl(dev, com, vec)
dev_t dev;
struct sgttyb *vec;
{
register int s;
switch(com) {
case TIOCSETF:
case TIOCGETF:
isfunction(com, (char *)vec);
goto ioc_done;;
case TIOCSHIFT: /* switch left-SHIFT and "\" */
lshift = LSHIFTA; /* alternate values */
lmaptab[41] = '\\';
lmaptab[42] = XXX;
umaptab[41] = '|';
umaptab[42] = XXX;
smaptab[41] = SS1;
smaptab[42] = SHFT;
goto ioc_done;;
case TIOCCSHIFT: /* normal (default) left-SHIFT and "\" */
lshift = LSHIFT; /* normal values */
lmaptab[41] = XXX;
lmaptab[42] = '\\';
umaptab[41] = XXX;
umaptab[42] = '|';
smaptab[41] = SHFT;
smaptab[42] = SS1;
goto ioc_done;;
}
s = sphi();
ttioctl(&istty, com, vec);
spl(s);
ioc_done:
return;
}
/*
* Set and receive the function keys.
*/
isfunction(c, v)
int c;
char *v;
{
register char *cp;
register int i;
if (c == TIOCGETF) {
for (cp = isfbuf; cp < &isfbuf[NFBUF]; cp++)
putubd(v++, *cp);
} else {
for (i=0; i<NFKEY; i++) /* zap current settings */
isfval[i] = 0;
cp = isfbuf; /* pointer to key buffer */
for (i=0; i<NFKEY; i++) {
isfval[i] = cp; /* save pointer to key string */
while ((*cp++ = getubd(v++)) != -1) /* copy key data */
if (cp >= &isfbuf[NFBUF-3]) /* overflow? */
return;
}
}
}
/*
* Poll routine.
*/
ispoll( dev, ev, msec )
dev_t dev;
int ev;
int msec;
{
return ttpoll(&istty, ev, msec);
}
/*
* Receive interrupt.
*/
isrint()
{
register int c;
register int s;
register int r;
int savests;
int update_leds = 0;
/*
* Schedule raw input handler if not already active.
*/
if ( isbusy == 0 ) {
isbusy = 1;
defer( isbatch, &istty );
}
/*
* Pull character from the data
* port. Pulse the KBFLAG in the control
* port to reset the data buffer.
*/
r = inb(KBDATA) & 0xFF;
c = inb(KBCTRL);
outb(KBCTRL, c|KBFLAG);
outb(KBCTRL, c);
#if KBDEBUG
printf("kbd: 0x%x ", r); /* print scan code/direction */
#endif
if (ledcmd) {
ledcmd = 0;
if (r == KBACK) { /* output to status LEDS */
c = scroll & 1;
if (shift & NMLS)
c |= 2;
if (shift & CPLS)
c |= 4;
outb(KBDATA, c);
}
return;
}
if (extended > 0) { /* if multi-character seq, */
--extended; /* ... ignore this char */
return;
}
switch (r) {
case EXTENDED0: /* 0xE0 prefix found */
ext0seen = 1;
return;
case EXTENDED1: /* ignore extended sequences */
extended = 5;
return;
case 0xFF: /* Overrun */
return;
}
if (ext0seen) {
ext0seen = 0;
extmode = 1;
} else
extmode = 0;
c = (r & KEYSC) - 1;
/*
* Check for reset.
*/
if ((r&KEYUP) == 0 && c == DELETE && (shift&(CTS|ALS)) == (CTS|ALS))
boot();
/*
* Track "shift" keys.
*/
s = smaptab[c];
if (s&SHFT) {
if (r&KEYUP) { /* "shift" released */
if (c == RSHIFT)
shift &= ~SRS;
else if (c == lshift)
shift &= ~SLS;
else if (c == CTRL)
shift &= ~CTS;
else if (c == ALT)
shift &= extmode ? ~AGS : ~ALS;
} else { /* "shift" pressed */
if (c == lshift)
shift |= SLS;
else if (c == RSHIFT)
shift |= SRS;
else if (c == CTRL)
shift |= CTS;
else if (c == ALT)
shift |= extmode ? AGS : ALS;
else if (c == CAPLOCK) {
shift ^= CPLS; /* toggle cap lock */
updleds();
} else if (c == NUMLOCK) {
shift ^= NMLS; /* toggle num lock */
updleds();
}
}
return;
}
/*
* No other key up codes of interest.
*/
if (r&KEYUP)
return;
/*
* If the tty is not open the character is
* just tossed away.
*/
if (istty.t_open == 0)
return;
/*
* Map character, based on the
* current state of the shift, control, alt graphics,
* meta (ALT) and lock flags.
*/
if (shift & AGS) /* Alt Graphics ? */
c = agmaptab[c];
else if (shift & CTS) {
if (s == CTS) /* Map Ctrl (BS | NL) */
c = (c == BACKSP) ? 0x7F : 0x0A;
else if (s==SS1 || s==LET) /* Normal Ctrl map */
c = umaptab[c]&0x1F; /* Clear bits 5-6 */
else
return; /* Ignore this char */
} else if (s &= shift) {
if (shift & SES) { /* if shift on */
if (s & (CPLS|NMLS)) /* if caps/num lock */
c = lmaptab[c]; /* use unshifted */
else
c = umaptab[c]; /* use shifted */
} else { /* if shift not on */
if (s & (CPLS|NMLS)) /* if caps/num lock */
c = umaptab[c]; /* use shifted */
else
c = lmaptab[c]; /* use unshifted */
}
} else
c = lmaptab[c]; /* use unshifted */
/*
* Act on character.
*/
if (c == XXX)
return; /* char to ignore */
if (c != SPC) { /* not special char? */
if (shift & ALS) /* ALT (meta bit)? */
c |= 0x80; /* set meta */
isin(c); /* send the char */
} else
update_leds += isspecial(r); /* special chars */
if (update_leds) {
savests = sphi();
outb(KBDATA, LEDCMD);
ledcmd = 1;
spl(savests);
}
}
/*
* Handle special input sequences.
* The character passed is the key number.
*
* The keypad is translated by the following table,
* the first entry is the normal sequence, the second the shifted,
* and the third the alternate keypad sequence.
*/
static char *keypad[][3] = {
{ "\33[H", "7", "\33?w" }, /* 71 */
{ "\33[A", "8", "\33?x" }, /* 72 */
{ "\33[V", "9", "\33?y" }, /* 73 */
{ "\33[D", "4", "\33?t" }, /* 75 */
{ "\0337", "5", "\33?u" }, /* 76 */
{ "\33[C", "6", "\33?v" }, /* 77 */
{ "\33[24H","1", "\33?q" }, /* 79 */
{ "\33[B", "2", "\33?r" }, /* 80 */
{ "\33[U", "3", "\33?s" }, /* 81 */
{ "\33[@", "0", "\33?p" }, /* 82 */
{ "\33[P", ".", "\33?n" } /* 83 */
};
isspecial(c)
int c;
{
register char *cp;
register int s;
int update_leds = 0;
cp = 0;
switch (c) {
case 15: /* cursor back tab */
cp = "\033[Z";
break;
case 53:
if (extmode)
cp = "/";
else if (shift & SES)
cp = "_";
else
cp = "-";
break;
case 55: /* ignore PrtScr */
if (!extmode)
cp = "*";
break;
case 59: case 60: case 61: case 62: case 63: /* Function keys */
case 64: case 65: case 66: case 67: case 68:
/* offset to function string */
if ( shift & ALS )
cp = isfval[c-49];
else
cp = isfval[c-59];
break;
case 70: /* Scroll Lock -- stop/start output */
{
static char cbuf[2];
cp = &cbuf[0]; /* working buffer */
if (!(istty.t_sgttyb.sg_flags&RAWIN)) { /* not if in RAW mode */
++update_leds;
if (istty.t_flags & T_STOP) { /* output stopped? */
cbuf[0] = istty.t_tchars.t_startc; /* start it */
scroll = 0;
} else {
cbuf[0] = istty.t_tchars.t_stopc; /* stop output */
scroll = 1;
}
}
break;
}
case 79: /* 1/End */
case 80: /* 2/DOWN */
case 81: /* 3/PgDn */
case 82: /* 0/Ins */
case 83: /* ./Del */
--c; /* adjust code */
case 75: /* 4/LEFT */
case 76: /* 5 */
case 77: /* 6/RIGHT */
--c; /* adjust code */
case 71: /* 7/Home/Clear */
case 72: /* 8/UP */
case 73: /* 9/PgUp */
s = 0; /* start off with normal keypad */
if (shift & NMLS) /* num lock? */
s = 1; /* set shift pad */
if (shift & SES) /* shift? */
s ^= 1; /* toggle shift pad */
if (shift & AKPS) /* alternate pad? */
s = 2; /* set alternate pad */
if (extmode) /* not from keypad? */
s = 0; /* force normal sequence */
cp = keypad[c-71][s]; /* get keypad value */
break;
}
if (cp) /* send string */
while ((*cp != 0) && (*cp != -1))
isin( *cp++ & 0377 );
return update_leds;
}
/**
*
* void
* ismmfunc( c ) -- process keyboard related output escape sequences
* char c;
*/
void
ismmfunc(c)
register int c;
{
switch (c) {
case 't': /* Enter numlock */
shift |= NMLS;
updleds(); /* update LED status */
break;
case 'u': /* Leave numlock */
shift &= ~NMLS;
updleds(); /* update LED status */
break;
case '=': /* Enter alternate keypad */
shift |= AKPS;
break;
case '>': /* Exit alternate keypad */
shift &= ~AKPS;
break;
case 'c': /* Reset terminal */
islock = 0;
shift = 0;
initkeys();
updleds(); /* update LED status */
break;
}
}
/**
*
* void
* isin( c ) -- append character to raw input silo
* char c;
*/
static
isin( c )
register int c;
{
int cache_it = 1;
TTY * tp = &istty;
/*
* If using software incoming flow control, process and
* discard t_stopc and t_startc.
*/
if (ISIXON) {
#if _I386
if (ISSTART || (ISIXANY && ISXSTOP)) {
tp->t_flags &= ~(T_STOP | T_XSTOP);
ttstart(tp);
cache_it = 0;
} else if (ISSTOP) {
if ((tp->t_flags&T_STOP) == 0)
tp->t_flags |= (T_STOP | T_XSTOP);
cache_it = 0;
}
#else
if (ISSTOP) {
if ((tp->t_flags&T_STOP) == 0)
tp->t_flags |= T_STOP;
cache_it = 0;
}
if (ISSTART) {
tp->t_flags &= ~T_STOP;
ttstart(tp);
cache_it = 0;
}
#endif
}
/*
* Cache received character.
*/
if (cache_it) {
in_silo.si_buf[ in_silo.si_ix ] = c;
if ( ++in_silo.si_ix >= sizeof(in_silo.si_buf) )
in_silo.si_ix = 0;
}
}
/**
*
* void
* isbatch() -- raw input conversion routine
*
* Action: Enable the video display.
* Canonize the raw input silo.
*
* Notes: isbatch() was scheduled as a deferred process by isrint().
*/
static void
isbatch( tp )
register TTY * tp;
{
register int c;
static int lastc;
/*
* Ensure video display is enabled.
*/
mm_von();
isbusy = 0;
/*
* Process all cached characters.
*/
while ( in_silo.si_ix != in_silo.si_ox ) {
/*
* Get next cached char.
*/
c = in_silo.si_buf[ in_silo.si_ox ];
if ( in_silo.si_ox >= sizeof(in_silo.si_buf) - 1 )
in_silo.si_ox = 0;
else
in_silo.si_ox++;
if ( (islock == 0) || ISINTR || ISQUIT ) {
ttin( tp, c );
}
else if ( (c == 'b') && (lastc == '\033') ) {
islock = 0;
ttin( tp, lastc );
ttin( tp, c );
}
else if ( (c == 'c') && (lastc == '\033') ) {
ttin( tp, lastc );
ttin( tp, c );
}
else
putchar('\007');
lastc = c;
}
}
/*
* update the keyboard status LEDS
*/
updleds()
{
int s;
s = sphi();
outb(KBDATA, LEDCMD);
ledcmd = 1;
spl(s);
}
/*
* unlock the scroll in case an interrupt character is received
*/
kbunscroll()
{
scroll = 0;
updleds();
}
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