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coherent
/*
* io.386/vtnkb.c
*
* Keyboard driver, virtual consoles, loadable tables.
*
* Revised: Fri Jul 16 08:39:12 1993 CDT
*/
#define SWANFIX 1
#define GREEKFIX 1
/*
* User configurable AT keyboard/display driver.
*/
#include <sys/coherent.h>
#include <sys/con.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/tty.h>
#include <signal.h>
#include <sys/seg.h>
#include <sys/sched.h>
#include <sys/kb.h>
#include <sys/devices.h>
#include <sys/silo.h>
#include <stddef.h>
#include <sys/vt.h>
#define ISVEC 1 /* Keyboard interrupt vector */
#define DEBUG 0
#define KBDEBUG(x) T_CON(1,printf(x)); /* debugging output */
#define KBDEBUG2(x,y) T_CON(1,printf(x,y)); /* debugging output */
#define KBDEBUG3(x,y,z) T_CON(1,printf(x,y,z)); /* debugging output */
/*
* values for kbstate
*/
#define KB_IDLE 0 /* nothing going on right now */
#define KB_SINGLE 1 /* sent a single byte cmd to the kbd */
#define KB_DOUBLE_1 2 /* sent 1st byte of 2-byte cmd to kbd */
#define KB_DOUBLE_2 3 /* sent 2nd byte of 2-byte cmd to kbd */
/*
* patchable params for non-standard keyboards
*/
int KBDATA = 0x60; /* Keyboard data */
int KBCTRL = 0x61; /* Keyboard control */
int KBSTS_CMD = 0x64; /* Keyboard status/command */
int KBFLAG = 0x80; /* Keyboard reset flag */
int KBBOOT = 1; /* 0: disallow reboot from keyboard */
int KBTIMEOUT = 10000; /* shouldn't need this much */
int KBCMDBYTE = 0x05; /* no translation */
/*
* KBSTATUS bits
*/
#define STS_OBUF_FULL 0x01 /* kbd output buffer full */
#define STS_IBUF_FULL 0x02 /* kbd input buffer full */
#define STS_SYSTEM 0x04
#define STS_CMD_DATA 0x08 /* 1: command or status */
#define STS_INHIBIT 0x10 /* 0: keyboard inhibited */
#define STS_AUX_OBUF_FULL 0x20
#define STS_TIMEOUT 0x40 /* general timeout */
#define STS_PAR_ERR 0x80 /* parity error */
/*
* The following are magic commands which read from or write to the
* controller command byte. These get output to the KBSTS_CMD port.
*/
#define C_READ_CMD 0x20 /* read controller command byte */
#define C_WRITE_CMD 0x60 /* write controller command byte */
#define C_TRANSLATE 0x40 /* translate enable bit in cmd byte */
/*
* Globals:
* The 286 keyboard mapping table is too large to fit into kernel data space,
* so we need to allocate a segment to it. 386 is easy.
* The function keys tend to be small and tend to change substantially
* more often than the mapping table, so we keep them in the kernel data space.
*/
static unsigned shift; /* state of all shift/lock keys */
static unsigned char **funkeyp = 0; /* ptr to array of func. keys ptrs */
static FNKEY *fnkeys = 0; /* pointer to structure of values */
static unsigned fklength; /* length of function key text */
static unsigned prev_cmd; /* previous command sent to KBD */
static unsigned cmd2; /* 2nd byte of command to KBD */
static unsigned sh_index; /* shift/lock state index */
#ifdef _I386
static KBTBL kb[MAX_KEYS]; /* keyboard table */
#else
static SEG *kbsegp; /* keyboard table segment */
#endif
/*
* State variables.
*/
int islock; /* Keyboard locked flag */
int isbusy; /* Raw input conversion busy */
static char table_loaded; /* true == keyboard table resident */
static char fk_loaded; /* true == function keys resident */
static int kbstate = KB_IDLE; /* current keyboard state */
static int xlate = 1; /* scan code translation flag */
#define ESCAPE_CHAR '\x1B'
#define ESCAPE_STRING "\x1B"
/*
* Functions.
*/
int isrint();
int istime();
void isbatch();
int vtmmstart();
int isopen();
int isclose();
int isread();
int vtmmwrite();
int isioctl();
void vtmmwatch();
int isload();
int isuload();
int ispoll();
int nulldev();
int nonedev();
int updleds();
/*
* Configuration table.
*/
CON vtnkbcon ={
DFCHR|DFPOL, /* Flags */
KB_MAJOR, /* Major index */
isopen, /* Open */
isclose, /* Close */
nulldev, /* Block */
isread, /* Read */
vtmmwrite, /* Write */
isioctl, /* Ioctl */
nulldev, /* Powerfail */
vtmmwatch, /* Timeout */
isload, /* Load */
isuload, /* Unload */
ispoll /* Poll */
};
/*
==============================================================================
==============================================================================
*/
/* constants for vtdata[] */
#define VT_VGAPORT 0x3D4
#define VT_MONOPORT 0x3B4
#ifdef _I386
#define VT_MONOBASE (SEG_VIDEOa|DPL_1)
#define VT_VGABASE (SEG_VIDEOb|DPL_1)
#else
#define VT_MONOBASE 0xB000
#define VT_VGABASE 0xB800
#endif
/*
Patchable table entries,
we go indirect in order to produce a label which can be addressed
*/
#if SWANFIX
int VTSWAN = 0; /* patch to 1 for epstein's fix for Swan keyboard */
#endif
#if GREEKFIX
static void ToggleGreek();
static int ToGreek();
int VTGREEK = 0; /* patch to 1 for TECOP Greek mod */
#endif
/* Configurable variables - see ker/conf/console/Space.c */
extern int vga_count;
extern int mono_count;
HWentry VTVGA = { 4, 0, VT_VGAPORT, { 0, VT_VGABASE }, { 25, 80 } };
HWentry VTMONO = { 4, 0, VT_MONOPORT, { 0, VT_MONOBASE }, { 25, 80 } };
HWentry *vtHWtable[] = {
VTVGA, /* VGA followed by MONO is compatible to DOS */
VTMONO,
0 /* MUST STAY AS LAST ELEMENT !!! */
};
extern int vtmminit();
static VTDATA const_vtdata = {
vtmminit, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 23, 24, 0, 0, 0, 23, 0, 0, 1
};
/* later this should be dynamic */
VTDATA *vtconsole, **vtdata;
int vtcount, vtmax;
extern int vtactive;
int vt_verbose = { 0 };
int vt_opened = { 0 };
/* Terminal structure. */
TTY **vttty;
/*
==============================================================================
==============================================================================
*/
static silo_t in_silo;
/*
* Given hw pointer for one of four types of adapters, see if
* device is present by write/readback of video memory.
*
* return 1 if present, else 0
*/
int
hwpresent( hw )
HWentry *hw;
{
int save, present = 1;
PRINTV( "hwpresent: %x:%x",
hw->vidmemory.seg, hw->vidmemory.off );
save = ffword( hw->vidmemory.off, hw->vidmemory.seg );
sfword( hw->vidmemory.off, hw->vidmemory.seg, 0xAA55 );
if( ffword( hw->vidmemory.off, hw->vidmemory.seg ) != 0xAA55 )
present = 0;
sfword( hw->vidmemory.off, hw->vidmemory.seg, 0x55AA );
if( ffword( hw->vidmemory.off, hw->vidmemory.seg ) != 0x55AA )
present = 0;
sfword( hw->vidmemory.off, hw->vidmemory.seg, save );
PRINTV( "%s present\n", present ? "" : " NOT" );
return present;
}
/*
* Load entry point.
*/
isload()
{
register int i;
register HWentry **hw;
register VTDATA *vp;
PRINTV("vtload:\n");
fk_loaded = 0;
table_loaded = 0;
kbstate = KB_IDLE;
/* Sugar for idtune and kpatch. */
VTVGA.count = vga_count;
VTMONO.count = mono_count;
/* figure out what our current max is */
for( vtmax = 0, hw = vtHWtable; *hw; ++hw ) {
vtmax += (*hw)->count;
(*hw)->found = 0; /* assume non-exist */
}
PRINTV( "vtload: %d screens possible\n", vtmax );
vtdata = (VTDATA **) kalloc( vtmax * sizeof( *vtdata ) );
if( vtdata == NULL ) {
printf( "vtload: unable to obtain vtdata[%d]\n", vtmax );
u.u_error = -1;
return;
}
PRINTV( "vtload: obtained vtdata[%d] @%x\n", vtmax, vtdata );
vttty = (TTY **) kalloc( vtmax * sizeof( *vttty ) );
if( vttty == NULL ) {
printf( "vtload: unable to obtain vttty[%d]\n", vtmax );
u.u_error = -1;
return;
}
PRINTV( "vtload: obtained vttty[%d] @%x\n", vtmax, vttty );
/* determine which video adaptors are present */
for( vtcount = 0, hw = vtHWtable; *hw; ++hw ) {
/* suppress board sensing since it seems to confuse some equipment */
#if 0
if( !hwpresent(*hw) )
continue;
#endif
/* remember our logical start */
(*hw)->start = vtcount;
PRINTV( ", start %d\n", vtcount );
/* allocate the necessary memory */
for ( i = 0; i < (*hw)->count; ++i ) {
vp = vtdata[vtcount] = kalloc( sizeof(VTDATA) );
PRINTV( " vtdata[%d] = @%x\n", vtcount, vp );
if( vp == NULL || !VTttyinit(vtcount) ) {
printf("not enough memory for VTDATA\n" );
break;
}
/* fill in appropriately */
*vp = const_vtdata;
vp->vmm_port = (*hw)->port;
vp->vmm_vseg = (*hw)->vidmemory.seg;
vp->vmm_voff = (*hw)->vidmemory.off;
vp->vt_ind = vtcount;
vtdatainit(vp);
if (i == 0 ) {
vp->vmm_visible = VNKB_TRUE;
vp->vmm_seg = vp->vmm_vseg;
vp->vmm_off = vp->vmm_voff;
vtupdscreen(vtcount);
}
(*hw)->found++;
vtcount++;
}
}
/*
* initialize vtconsole
*/
vtconsole = vtdata[vtactive = 0];
vtconsole->vmm_invis = 0; /* vtconsole cursor visible */
/*
* Seize keyboard interrupt.
*/
#ifdef _I386
setivec(ISVEC, isrint);
#else
#if VT_MAJOR == KB_MAJOR
setivec(1, isrint);
#else
/*
* Map table and vector to us
*/
i = sphi();
PRINTV( "VTload: unload old vector\n" );
kcall( Kclrivec, 1 );
setivec(1, isrint);
spl( i );
#endif
#endif /* _I386 */
/*
* Enable mmwatch() invocation every second.
*/
drvl[VT_MAJOR].d_time = 1;
/*
* Initialize video display.
*/
for ( i = 0; i < vtcount; ++i )
vtmmstart( vttty[i] );
#ifndef _I386
/*
* Allocate a segment to store the in-core keyboard table.
* This would be a lot more convenient in kernel data space,
* but small model COHERENT doesn't have that luxury.
*/
kbsegp = salloc((fsize_t)MAX_TABLE_SIZE, SFSYST|SFNSWP|SFHIGH);
if (kbsegp == (SEG *)0)
printf("kb: unable to allocate keyboard table segment\n");
KBDEBUG("Exiting kbload()\n");
#endif
fklength = 0;
}
/*
* Unload entry point.
*/
isuload()
{
register int i;
register level = sphi();
clrivec(ISVEC);
#ifndef _I386
#if VT_MAJOR != KB_MAJOR
kcall( Ksetivec, ISVEC, &Kisrint );
#endif
#endif
spl( level );
/* Restore pointers to original state. */
vtconsole = vtdata[0];
vtconsole->vmm_invis = 0;
vtconsole->vmm_visible = VNKB_TRUE;
if( vt_opened )
printf( "VTclose with %d open screens\n", vt_opened );
if( kbstate != KB_IDLE )
printf("kb: keyboard busy during unload\n");
#ifndef _I386
if (kbsegp != (SEG *)0) {
table_loaded = 0;
sfree(kbsegp);
}
#endif
#ifndef _I386
for( i = 0; i < vtcount; ++i ) {
PRINTV( "VTuload: free far %x:%x, tty %x\n",
vttty[i]->t_buffer->s_faddr, vttty[i] );
sfree( vttty[i]->t_buffer );
kfree( vttty[i] );
sfree( vtdata[i].vt_buffer );
}
#endif
}
/*
* Open routine.
*/
isopen(dev, mode)
dev_t dev;
unsigned int mode;
{
register int s;
register TTY *tp;
int index = vtindex(dev);
PRINTV("isopen: %x\n", dev);
if (index < 0 || index >= vtcount) {
u.u_error = ENXIO;
return;
}
tp = vttty[index];
if ((tp->t_flags&T_EXCL) != 0 && !super()) {
u.u_error = ENODEV;
return;
}
ttsetgrp(tp, dev, mode);
s = sphi();
if (tp->t_open++ == 0) {
tp->t_flags = T_CARR; /* indicate "carrier" */
ttopen(tp);
}
spl(s);
#if 0
updleds(); /* update keyboard status LEDS */
#endif
}
void isvtswitch();
/*
* Close a tty.
*/
isclose(dev)
{
register int s;
int index = vtindex(dev);
register TTY *tp = vttty[index];
#if 0
s = sphi();
if (--tp->t_open == 0) {
ttclose(tp);
spl(s);
if( index == vtactive )
isvtswitch( VTKEY_HOME );
} else
spl(s);
#else
if (--tp->t_open == 0)
ttclose(tp);
#endif
}
/*
* Read routine.
*/
isread(dev, iop)
dev_t dev;
IO *iop;
{
int index = vtindex(dev);
register TTY *tp = vttty[index];
ttread(tp, iop, 0);
if (tp->t_oq.cq_cc)
vtmmtime(tp);
}
/*
* special constants/struct for the XWindow/KDMAPDISP calls
*/
#define KDMAPDISP (('K' << 8) | 2) /* map display into user space */
#define KDSKBMODE (('K' << 8) | 6) /* turn scan code xlate on/off */
#define KDMEMDISP (('K' << 8) | 7) /* dump byte of virt/phys mem */
#define KDENABIO (('K' << 8) | 60) /* enable IO */
#define KIOCSOUND (('K' << 8) | 63) /* start sound generation */
#define KDSETLED (('K' << 8) | 66) /* set leds */
#define TIMER_CTL 0x43 /* Timer control */
#define TIMER_CNT 0x42 /* Timer counter */
#define SPEAKER_CTL 0x61 /* Speaker control */
struct kd_memloc {
char *vaddr; /* virtual address to map to */
char *physaddr; /* physical address to map to */
long length; /* size in bytes to map */
long ioflg; /* enable I/O addresses if non-zero */
};
static TIM tp;
int
resetkb(action)
int action;
{
int i;
if (action == 1) {
timeout(&tp,20,resetkb,2);
outb(KBCTRL, 0xCC); /* Clock high */
}
if (action == 2) {
i = inb(KBDATA);
outb(KBCTRL, 0xCC); /* Clear keyboard */
outb(KBCTRL, 0x4D); /* Enable keyboard */
}
}
static int X11led;
/*
* Ioctl routine.
* nb: archaic TIOCSHIFT and TIOCCSHIFT no longer needed/supported.
*/
isioctl(dev, com, vec)
dev_t dev;
struct sgttyb *vec;
{
register int s;
switch (com) {
#define KDDEBUG 0
#if KDDEBUG
case KDMEMDISP:
{
struct kd_memloc* mem;
unsigned char ub, pb;
mem = vec;
pxcopy( mem->physaddr, &pb, 1, SEG_386_KD );
ub = getubd( mem->vaddr );
printf( "User's byte %x(%x), Physical byte %x, Addresses %x %x\n",
mem->ioflg, ub, pb, mem->vaddr, mem->physaddr );
break;;
}
#endif
case KDMAPDISP:
{
struct kd_memloc* mem;
mem = vec;
#if KDDEBUG
printf( "mapPhysUser(%x, %x, %x) = %d\n",
mem->vaddr, mem->physaddr, mem->length,
#endif
mapPhysUser(mem->vaddr, mem->physaddr, mem->length)
#if KDDEBUG
)
#endif
;
}
case KDENABIO:
{
int i;
for (i = 0 ; i < 64 ; i++ )
iomapAnd(0,i);
break;;
}
case KIOCSOUND:
{
if (vec) {
outb(TIMER_CTL, 0xB6);
outb(TIMER_CNT, (int)vec&0xFF);
outb(TIMER_CNT, (int)vec>>8);
outb(SPEAKER_CTL, inb(SPEAKER_CTL) | 03); /* Turn speaker on */
}
else
outb(SPEAKER_CTL, inb(SPEAKER_CTL) & ~03 ); /* speaker off */
break;;
}
case KDSKBMODE:
{
static int vtB4X11;
/* outb(KBCTRL, 0x0C); /* Clock low */
/* timeout(&tp,3,resetkb,1); /* wait about 20-30ms */
if (xlate > vec) { /* Turning translation off */
kb_cmd2(K_SCANCODE_CMD, 1); /* set 1 for X */
#if 0
/* deactivate virtual terminal */
vtB4X11 = vtactive;
vtdeactivate(vtdata[vtactive], vtdata[vtcount]);
vtactivate(vtdata[vtcount]);
vtactive = vtcount;
#endif
}
else if (xlate < vec) { /* turning translation on */
kb_cmd2(K_SCANCODE_CMD, 3); /* set 3 for COH */
#if 0
/* reactivate virtual terminal */
vtactivate(vtdata[vtB4X11]);
vtactive = vtB4X11;
#endif
}
xlate = (int)vec;
/* kb_cmd(K_ALL_TMB_CMD); /* default: TMB for all keys */
break;;
}
case KDSETLED:
{
X11led = (int)vec;
updleds();
break;;
}
case TIOCSETF:
case TIOCGETF:
isfunction(com, (char *)vec);
break;
case TIOCSETKBT:
issettable(vec);
break;
case TIOCGETKBT:
isgettable(vec);
break;
default: /* pass to TTY driver */
s = sphi();
ttioctl(vttty[vtindex(dev)], com, vec);
spl(s);
break;
}
}
/*
* Set the in-core keyboard mapping table.
* The table is sorted by scan code prior to calling ioctl().
* All unused table entries (holes in the scan code map) have
* a zero for the k_key field.
* This makes key lookup at interrupt time fast by using the scan code
* as an index into the table.
*/
issettable(vec)
char *vec;
{
register unsigned i;
register int s;
int timeout;
static KBTBL this_key; /* current key from kbd table */
unsigned int cmd_byte;
#ifndef _I386
register faddr_t faddr; /* address of keyboard table */
#endif
PRINTV(" TIOCSETKBT");
kb_cmd2(K_SCANCODE_CMD, 3); /* select set 3 */
kb_cmd(K_ALL_TMB_CMD); /* default: TMB for all keys */
#ifndef _I386
faddr = kbsegp->s_faddr;
#endif
for (i = 0; i < MAX_KEYS; ++i) {
ukcopy(vec, &this_key, sizeof(this_key));
#ifdef _I386
kb[i] = this_key; /* store away */
#else
kfcopy(&this_key, faddr, sizeof(this_key));
faddr += sizeof(this_key);
#endif
vec += sizeof(this_key);
if (this_key.k_key != i && this_key.k_key != 0) {
printf("kb: incorrect or unsorted table entry %d\n", i);
#ifdef _I386
u.u_error = EINVAL;
#else
u.u_error = EBADFMT;
#endif
return;
}
if (this_key.k_key != i)
continue; /* no key */
switch (this_key.k_flags&TMODE) {
case T: /* typematic */
kb_cmd2(K_KEY_T_CMD, i);
break;
case M: /* make only */
kb_cmd2(K_KEY_M_CMD, i);
break;
case MB: /* make/break */
kb_cmd2(K_KEY_MB_CMD, i);
break;
case TMB: /* typematic make/break */
break; /* this is the default */
default:
printf("kb: bad key mode\n");
}
}
updleds();
kb_cmd2(K_SCANCODE_CMD, 3); /* select set 3 */
kb_cmd(K_ENABLE_CMD); /* start scanning */
/*
* The following code disables translation from the on-board
* keyboard/aux controller. Without disabling translation, the
* received scan codes still look like code set 1 codes even
* though we put the keyboard controller in scan code set 3.
* Yes, this is progress....
*/
#if 0
while (inb(KBSTS_CMD) & STS_IBUF_FULL)
;
outb(KBSTS_CMD, C_READ_CMD); /* read controller cmd byte */
while (!(inb(KBSTS_CMD) & STS_OBUF_FULL))
;
cmd_byte = inb(KBDATA);
KBDEBUG2(" cmd_byte=%x", cmd_byte);
#endif
timeout = KBTIMEOUT;
s = sphi();
while ((inb(KBSTS_CMD) & STS_IBUF_FULL) && --timeout > 0)
;
outb(KBSTS_CMD, C_WRITE_CMD); /* write controller cmd byte */
for (timeout = 50; --timeout > 0;)
;
timeout = KBTIMEOUT;
while ((inb(KBSTS_CMD) & STS_IBUF_FULL) && --timeout > 0)
;
outb(KBDATA, KBCMDBYTE); /* turn off translation */
timeout = KBTIMEOUT;
while ((inb(KBSTS_CMD) & STS_IBUF_FULL) && --timeout > 0)
;
spl(s);
#if DEBUG || 1
kb_cmd2(K_SCANCODE_CMD, 0); /* query s.c. mode */
#endif
++table_loaded;
PRINTV("... TIOCSETKBT\n");
}
/*
* Get the in-core keyboard mapping table and pass it to the user.
*/
isgettable(vec)
char *vec;
{
#ifdef _I386
KBDEBUG(" TIOCGETKBT");
kucopy(kb, vec, sizeof(kb));
#else
register unsigned i;
register faddr_t faddr; /* address of keyboard table */
static KBTBL this_key; /* current key from kbd table */
KBDEBUG(" TIOCGETKBT");
faddr = kbsegp->s_faddr;
for (i = 0; i < MAX_KEYS; ++i) {
fkcopy(faddr, &this_key, sizeof(this_key));
kucopy(&this_key, vec, sizeof(this_key));
faddr += sizeof(this_key);
vec += sizeof(this_key);
}
#endif
}
/*
* Set and receive the function keys.
*/
isfunction(c, v)
int c;
FNKEY *v;
{
register unsigned char *cp;
register unsigned i;
unsigned char numkeys = 0;
if (c == TIOCGETF) {
KBDEBUG(" TIOCGETF");
if (!fk_loaded)
u.u_error = EINVAL;
else
kucopy(fnkeys, v, fklength); /* copy ours to user */
} else { /* TIOCSETF */
/*
* If we had a previous function key arena, free it up.
* Since we don't know how large the function key arena will
* be, we must size it in the user data space prior to
* (re)kalloc()'ing it. This is ugly, but a helluva lot better
* than the old driver which used a hard coded limit of 150!
*/
KBDEBUG(" TIOCSETF");
fk_loaded = 0;
if (fnkeys != (FNKEY *)0)
kfree(fnkeys); /* free old arena */
if (funkeyp != NULL)
kfree(funkeyp); /* free old ptr array */
ukcopy(&v->k_nfkeys, &numkeys, sizeof(numkeys));
/*
* I'd use offsetof (), but right now it is broken due to a
* compiler bug.
*/
fklength = sizeof (FNKEY);
cp = (char *) (v + 1);
for (i = 0; i < numkeys; i++) {
do {
++fklength;
} while (getubd(cp++) != DELIM);
}
fnkeys = (FNKEY *)kalloc(fklength);
funkeyp = (unsigned char **)kalloc(numkeys * sizeof(char *));
if (fnkeys == (FNKEY *)0 || funkeyp == NULL) {
if (fnkeys != (FNKEY *)0) {
kfree(fnkeys);
fnkeys = 0;
}
if (funkeyp != NULL) {
kfree(funkeyp);
funkeyp = 0;
}
u.u_error = ENOMEM;
return;
}
cp = (char *) (fnkeys + 1); /* point to Fn ... */
v = (char *) (v + 1); /* ... key arena */
for (i = 0; i < numkeys; i++) {
funkeyp[i] = cp; /* save pointer */
while ((*cp++ = getubd(v++)) != DELIM) /* copy key */
;
}
fnkeys->k_nfkeys = numkeys;
fk_loaded = 1;
}
}
/*
* Poll routine.
*/
ispoll(dev, ev, msec)
dev_t dev;
int ev;
int msec;
{
register TTY *tp = vttty[vtindex(dev)];
return ttpoll(tp, ev, msec);
}
/*
* Receive interrupt.
*/
#define K_E0ESC 0xE0 /* Swan Keyboard, Strange Escape Byte */
isrint()
{
register unsigned c;
register unsigned r;
static char keyup;
#if SWANFIX
static char e0esc;
#endif
/*
* Schedule raw input handler if not already active.
*/
if (! isbusy) {
defer (isbatch, vttty [vtactive]);
isbusy = 1;
}
/*
* 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);
/*
* check returned value from keyboard to see if it's a command
* or status back to us. If not, it we assume that it's a key code.
*/
KBDEBUG2 ("\nintr(%x) ", r);
if (!xlate) switch (r) {
case K_BAT_BAD:
printf("kb: keyboard BAT failed\n");
break;
case K_RESEND:
KBDEBUG("\nkb: request to resend command\n");
outb(KBDATA, prev_cmd);
break;
case K_OVERRUN_23:
printf("kb: keyboard buffer overrun\n");
break;
case K_ACK:
/*
* we received an ACKnowledgement from the keyboard.
* advance the state machine and continue.
*/
KBDEBUG(" ACK ");
switch (kbstate) {
case KB_IDLE: /* shouldn't happen */
printf("vtnkb: ACK while idle ");
break;
case KB_SINGLE: /* done with 1-byte command */
case KB_DOUBLE_2: /* done w/ 2nd of 2-byte cmd */
kbstate = KB_IDLE;
wakeup(&kbstate);
break;
case KB_DOUBLE_1:
kbstate = KB_DOUBLE_2;
outb(KBDATA, cmd2);
break;
default:
printf("kb: bad kbstate %d\n", kbstate);
break;
}
break;
default:
isin(r);
break;
} else switch (r) {
case K_BREAK:
keyup = 1; /* key going up */
break;
case K_ECHO_R:
case K_BAT_OK:
break; /* very nice, but ignored */
case K_BAT_BAD:
printf ("kb: keyboard BAT failed\n");
break;
case K_RESEND:
KBDEBUG ("\nkb: request to resend command\n");
outb (KBDATA, prev_cmd);
break;
case K_OVERRUN_23:
printf ("kb: keyboard buffer overrun\n");
break;
case K_ACK:
/*
* we received an ACKnowledgement from the keyboard.
* advance the state machine and continue.
*/
KBDEBUG (" ACK ");
switch (kbstate) {
case KB_IDLE: /* shouldn't happen */
printf ("vtnkb: ACK while idle ");
break;
case KB_SINGLE: /* done with 1-byte command */
case KB_DOUBLE_2: /* done w/ 2nd of 2-byte cmd */
kbstate = KB_IDLE;
wakeup (& kbstate);
break;
case KB_DOUBLE_1:
kbstate = KB_DOUBLE_2;
outb (KBDATA, cmd2);
break;
default:
printf ("kb: bad kbstate %d\n", kbstate);
break;
}
break;
#if SWANFIX
case K_E0ESC:
if (VTSWAN) {
e0esc = 1;
break;
}
#endif
default:
#if SWANFIX
process_key (r, keyup, e0esc);
e0esc = 0;
#else
process_key (r, keyup);
#endif
keyup = 0;
}
}
/*
* Process a key given its scan code and direction.
*
* In this table driven version of the keyboard driver, we trade off the
* code complexity associated with all the black magic that used to be
* performed on a per-key basis with the increased memory requirements
* associated with the table driven approach.
*/
#if SWANFIX 1
process_key(key, up, e0esc)
unsigned key;
char up, e0esc;
#else
process_key(key, up)
unsigned key;
int up;
#endif
{
register unsigned char *cp;
KBTBL key_vals; /* table values for this key */
unsigned val;
unsigned char flags;
register TTY *tp = vttty[vtactive];
VTDATA *vp = vtdata[vtactive];
KBDEBUG3(" proc(%x %s)", key, (up ? "up" : "down"));
if (!table_loaded)
return; /* throw away key */
#ifdef _I386
/*
* It's ugly but, if e0esc, then we use the ALT_GR field to point
* at the actual table entry we want. We weren't really using the
* ALT_GR field anyway. Trouble remapping shift keys because
* loader requires all entries to be identical, thus ALT_GR is
* by default being used.
*/
#if SWANFIX
if (VTSWAN && e0esc && (kb [key].k_flags & S) == 0)
key = kb [key].k_val [ALT_GR]; /* Ugly kludge */
#endif
key_vals = kb [key];
#else
fkcopy (kbsegp->s_faddr + (key * sizeof(KBTBL)),
& key_vals, sizeof (key_vals));
#endif
if (key_vals.k_key != key) /* empty entry */
return;
flags = key_vals.k_flags;
if (flags & S) { /* some shift/lock key ? */
switch (key_vals.k_val [BASE]) {
case caps:
case num:
if (!up) {
shift ^= (1 << key_vals.k_val[BASE]);
updleds2 ();
}
break;
case scroll:
if (! up) {
shift ^= (1 << key_vals.k_val[BASE]);
updleds2 ();
if (_IS_RAW_INPUT_MODE (tp)) {
if (tp->t_flags & T_STOP)
isin (tp->t_tchars.t_startc);
else
isin (tp->t_tchars.t_stopc);
}
}
break;
default:
if (up)
shift &= ~ (1 << key_vals.k_val [BASE]);
else
shift |= (1 << key_vals.k_val [BASE]);
break;
}
/*
* Calculate the shift index based upon the state of
* the shift and lock keys.
*/
sh_index = BASE; /* default condition */
if (shift & (1 << altgr))
sh_index = ALT_GR;
else {
if (shift & ((1 << lalt) | (1 << ralt)))
sh_index |= ALT;
if (shift & ((1 << lctrl) | (1 << rctrl)))
sh_index |= CTRL;
if (shift & ((1 << lshift) | (1 << rshift)))
sh_index |= SHIFT;
}
T_CON(2, printf("shift=%x sh_index=%d\n", shift, sh_index));
return;
} /* if (flags & S) */
/*
* If the key has no value in the current
* shift state, the key is just tossed away.
*/
if (up || key_vals.k_val [sh_index] == none)
return;
if (((flags & C) != 0 && (shift & (1 << caps)) != 0) ||
((flags & N) != 0 && (shift & (1 << num))) != 0)
val = key_vals.k_val [sh_index ^ SHIFT];
else
val = key_vals.k_val [sh_index];
/*
* Check for function key or special key implemented as
* a function key (reboot == f0, tab and back-tab, etc).
*/
if (flags & F) {
PRINTV ("<{F%d}>", val);
if (VTKEY (val)) {
T_CON(4,
printf( "<{F%d !!}>\b\b\b\b\b\b\b\b\b\b", val));
defer (isvtswitch, val);
return;
}
/* If the tty is not open, ignore it */
if (! tp->t_open)
return;
#if GREEKFIX
if (VTGREEK && val == fgk) {
ToggleGreek ();
return;
}
#endif /* GREEKFIX */
if (val == 0 && ! up && KBBOOT)
boot ();
if (! fk_loaded || val >= fnkeys->k_nfkeys)
return;
if ((cp = funkeyp [val]) == NULL) /* has a value? */
return;
while (* cp != DELIM)
isin (* cp ++); /* queue up Fn key value */
return;
}
/*
* Normal key processing.
*/
/* If the tty is not open, ignore it */
#if GREEKFIX
if (tp->t_open)
if (VTGREEK) {
if (ToGreek (& val))
isin (val);
} else
isin (val);
#else
if (tp->t_open)
isin (val); /* send the char */
#endif /* GREEKFIX */
}
/**
*
* void
* ismmfunc(c) -- process keyboard related output escape sequences
* char c;
*/
void
ismmfunc(c)
register int c;
{
switch (c) {
case 't': /* Enter numlock */
shift |= (1 << num);
updleds (); /* update LED status */
break;
case 'u': /* Leave numlock */
shift &= ~ (1 << num);
updleds (); /* update LED status */
break;
case '=': /* Enter alternate keypad -- ignored */
case '>': /* Exit alternate keypad -- ignored */
break;
case 'c': /* Reset terminal */
islock = 0;
break;
}
}
/**
*
* void
* isin(c) -- append character to raw input silo
* char c;
*/
static
isin(c)
register int c;
{
int cache_it = 1;
TTY * tp = vttty[vtactive];
void ttstart();
/*
* If using software incoming flow control, process and
* discard t_stopc and t_startc.
*/
if (_IS_IXON_MODE (tp)) {
#if _I386
if (_IS_START_CHAR (tp, c) ||
(_IS_IXANY_MODE (tp) && (tp->t_flags & T_STOP) != 0)) {
tp->t_flags &= ~ (T_STOP | T_XSTOP);
ttstart (tp);
cache_it = 0;
} else if (_IS_STOP_CHAR (tp, c)) {
if ((tp->t_flags & T_STOP) == 0)
tp->t_flags |= (T_STOP | T_XSTOP);
cache_it = 0;
}
#else
if (_IS_STOP_CHAR (tp, c)) {
if ((tp->t_flags & T_STOP) == 0)
tp->t_flags |= T_STOP;
cache_it = 0;
}
if (_IS_START_CHAR (tp, c)) {
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;
VTDATA *vp = tp->t_ddp;
/*
* Ensure video display is enabled.
*/
if( vp->vmm_visible ) {
vtmm_von(vp);
}
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 || _IS_INTERRUPT_CHAR (tp, c) ||
_IS_QUIT_CHAR (tp, c)) {
ttin (tp, c);
} else if ((c == 'b') && lastc == ESCAPE_CHAR) {
islock = 0;
ttin (tp, lastc);
ttin (tp, c);
} else if (c == 'c' && lastc == ESCAPE_CHAR) {
ttin (tp, lastc);
ttin (tp, c);
} else
putchar ('\a');
lastc = c;
}
}
/*
* update the keyboard status LEDS.
* we chose the shift/lock key positions so this would be easy.
* this flavor of routine is called while processing a system call on
* behalf of the user.
*/
updleds()
{
if (!xlate)
kb_cmd2(K_LED_CMD, X11led);
else
kb_cmd2(K_LED_CMD, (shift >> 1) & 0x7);
}
/*
* same as above, but callable from interrupt routines and other places
* which cannot sleep() waiting for the state machine to go idle.
*/
updleds2()
{
register timeout;
register int s;
timeout = KBTIMEOUT;
s = sphi();
while (--timeout > 0 && (inb(KBSTS_CMD) & STS_IBUF_FULL))
;
kbstate = KB_DOUBLE_1;
if (!xlate)
cmd2 = X11led;
else
cmd2 = (shift >> 1) & 0x7;
prev_cmd = K_LED_CMD;
outb (KBDATA, K_LED_CMD);
spl (s);
}
/*
* unlock the scroll in case an interrupt character is received
*/
kbunscroll()
{
shift &= ~ (1 << scroll);
updleds ();
}
/*
* ship a single byte command to the keyboard
*/
kb_cmd(cmd)
unsigned cmd;
{
register int timeout;
register int s;
s = sphi();
KBDEBUG2(" kb_cmd(%x)", cmd);
while (kbstate != KB_IDLE)
#ifdef _I386
x_sleep(&kbstate, pritty, slpriSigCatch, "kb a");
#else
v_sleep(&kbstate, CVTTIN, IVTTIN, SVTTIN, "kb a");
#endif
kbstate = KB_SINGLE;
timeout = KBTIMEOUT;
while (--timeout > 0 && (inb(KBSTS_CMD) & STS_IBUF_FULL))
;
if (!timeout)
printf("kb: command timeout\n");
else {
outb(KBDATA, cmd);
while (kbstate != KB_IDLE)
#ifdef _I386
x_sleep(&kbstate, pritty, slpriSigCatch, "kb b");
#else
v_sleep(&kbstate, CVTTIN, IVTTIN, SVTTIN, "kb b");
#endif
}
spl(s);
}
/*
* ship a two byte command to the keyboard
*/
kb_cmd2(cmd, arg)
unsigned cmd, arg;
{
register int timeout;
register int s;
s = sphi();
KBDEBUG3(" kb_cmd2(%x, %x)", cmd, arg);
while (kbstate != KB_IDLE)
#ifdef _I386
x_sleep(&kbstate, pritty, slpriSigCatch, "kb c");
#else
v_sleep(&kbstate, CVTTIN, IVTTIN, SVTTIN, "kb c");
#endif
kbstate = KB_DOUBLE_1;
cmd2 = arg;
prev_cmd = cmd;
timeout = KBTIMEOUT;
while (--timeout > 0 && (inb(KBSTS_CMD) & STS_IBUF_FULL))
;
if (!timeout)
printf("kb: command timeout\n");
else {
outb(KBDATA, cmd);
while (kbstate != KB_IDLE)
#ifdef _I386
x_sleep(&kbstate, pritty, slpriSigCatch, "kb d");
#else
v_sleep(&kbstate, CVTTIN, IVTTIN, SVTTIN, "kb d");
#endif
}
spl(s);
}
/*
==============================================================================
==============================================================================
*/
int
VTttyinit(i)
int i;
{
TTY *tp;
/*
* get pointer to TTY structure from kernal memory space
*/
if( (tp = vttty[i] = (TTY *)kalloc(sizeof (TTY))) == NULL )
return(0);
PRINTV( " vttty[%d]: @%x, ", i, tp );
#if FAR_TTY
/*
* get pointers to the buffers pointed to by the TTY structure
* from user memory space
*/
tp->t_buffer = salloc( (fsize_t)NCIB+2*SI_BUFSIZ, SFSYST|SFNSWP );
tp->t_ib = 0;
tp->t_rawin.si_buf = NCIB;
tp->t_rawout.si_buf = NCIB+SI_BUFSIZ;
#endif
tp->t_param = NULL;
tp->t_start = &vtmmstart;
#ifndef _I386
#if VT_MAJOR == KB_MAJOR
tp->t_cs_sel = 0;
#else
tp->t_cs_sel = cs_sel();
#endif
#endif
tp->t_ddp = vtdata[i];
PRINTV( "data @%lx\n", tp->t_ddp );
return(1);
}
vtdatainit(vp)
VTDATA *vp;
{
#ifndef _I386
VT_FARSEG vt_farseg;
#endif
/*
* vtdata init - vmm part
*/
vp->vmm_invis = -1; /* cursor invisible */
#ifdef _I386
vp->vt_buffer = kalloc( TEXTBLOCK );
vp->vmm_seg = vp->vmm_mseg = vtds_sel();
vp->vmm_off = vp->vmm_moff = vp->vt_buffer;
#else
vp->vt_buffer = salloc ( (fsize_t)TEXTBLOCK, SFSYST|SFNSWP|SFHIGH );
vp->vmm_seg = vp->vmm_mseg = FP_SEG( vp->vt_buffer->vt_faddr );
vp->vmm_off = vp->vmm_moff = FP_OFF( vp->vt_buffer->vt_faddr );
#endif
PRINTV( "vt@%x init index %d,%d), seg %x, off %x\n",
vp, vp->vt_ind, vp->vmm_mseg, vp->vmm_moff );
/*
* vtdata init - vnkb part
*/
/* Make the first memory block active, if present */
vp->vnkb_lastc = 0;
vp->vnkb_fnkeys = 0;
vp->vnkb_funkeyp = 0;
vp->vnkb_fk_loaded = 0; /* no Fn keys yet */
}
/*
* Given device number, return index for vtdata[], vttty[], etc.
*
* Major number must be VT_MAJOR for CPU to get here.
*
* Minor Number Index Value
* ----- ------ ----- -----
* 0000 0000 vtactive ... device (2,0) is the active screen
* 0000 0001 0
* 0000 0010 1
* 0000 0011 2
* ....
* 0000 1111 14
*
* 0100 xxxx xxxx ... color devices only
* 0101 xxxx xxxx - (# of color devices found) ... monochrome only
*
* Return value is in range 0 to vtcount-1 for valid minor numbers,
* -1 for invalid minor numbers.
*/
int
vtindex( dev )
dev_t dev;
{
register int ret = -1;
if ( dev & VT_PHYSICAL ) {
int hw = ( dev >> 4 ) & 3;
int hw_index = dev & 0x0F;
if( hw_index < vtHWtable[hw]->found )
ret = vtHWtable[hw]->start + hw_index;
} else {
int lg_index = dev & 0x0F;
if (lg_index == 0)
ret = vtactive;
if (lg_index > 0 && lg_index <= vtcount )
ret = lg_index-1;
}
if (ret >= 0)
ret %= vtcount;
else
PRINTV( "vtindex: (%x) %d. invalid !\n", dev, ret );
return ret;
}
/*
*
* void
* isvtswitch() -- deferred virtual terminal switch
*
* Action: - save current shift key status
* - determine new active virtual terminal
* - deactivate shift key status of the current virtual terminal
* - deactivate current virtual terminal
* - activate shift key status of the new virtual terminal with
* the previously saved shift key status
* - activate new virtual terminal
*
* Notes: isvtswitch() was scheduled as a deferred process by
* process_key() which is a function called by isrint().
*/
void
isvtswitch(key_val)
{
register int new_index, i;
unsigned lockshift, nolockshift;
VTDATA *vp = vtdata[vtactive];
VTDATA *vp_old, *vp_new;
static int vtprevious;
T_CON(2, printf("old shift=%x sh_index=%d\n", shift, sh_index));
lockshift = shift & ((1<<scroll)|(1<<num)|(1<<caps));
nolockshift = shift & ~((1<<scroll)|(1<<num)|(1<<caps));
PRINTV( "F%d: %d", key_val, vtactive );
#if 0
if( key_val == VTKEY_HOME )
new_index = 0;
else if( key_val == VTKEY_NEXT ) {
new_index = vtactive;
for( i = 0; i < vtcount; ++i ) {
new_index = ++new_index % vtcount;
if( vttty[new_index]->t_open )
break;
}
} else {
new_index = vtindex(vtkey_to_dev(key_val));
if( new_index < 0) {
putchar( '\007' );
return;
}
}
#else
switch (key_val) {
case VTKEY_HOME:
new_index = 0;
break;
case VTKEY_NEXT:
new_index = vtactive;
for( i = 0; i < vtcount; ++i ) {
new_index = ++new_index % vtcount;
if( vttty[new_index]->t_open )
break;
}
break;
case VTKEY_PREV:
new_index = vtactive;
for( i = 0; i < vtcount; ++i ) {
new_index = (--new_index+vtcount) % vtcount;
if( vttty[new_index]->t_open )
break;
}
break;
case VTKEY_TOGL:
new_index = vtprevious;
break;
default:
new_index = vtindex(vtkey_to_dev(key_val));
if( new_index < 0) {
putchar( '\007' );
return;
}
}
#endif
T_CON(8, printf("%d->%d ", vtactive, new_index));
if( new_index == vtactive )
return;
/* Save which locking shift states are in effect. */
vp_old = vtdata[vtactive];
vp_new = vtdata[new_index];
vp_old->vnkb_shift = lockshift;
vtdeactivate(vp_new, vp_old); /* deactivate old virtual terminal */
/* Restore shift lock state, append current momentary shift state. */
shift = vp_new->vnkb_shift | nolockshift;
T_CON(2, printf("new shift=%x sh_index=%d\n", shift, sh_index));
vtactivate(vp_new); /* activate new virtual terminal */
updterminal(new_index);
vtprevious = vtactive;
vtactive = new_index; /* update vtactive */
}
vtdeactivate(vp_new, vp_old)
register VTDATA *vp_new, *vp_old;
{
register i;
VTDATA *vpi;
/* store old screen contents in memory segment */
ffcopy (vp_old->vmm_voff, vp_old->vmm_vseg,
vp_old->vmm_moff, vp_old->vmm_mseg, TEXTBLOCK);
/*
* if changing to another screen on same video board
* for all screens on same board as new screen
* deactivate, but don't update
* else - changing to a screen on different board
* for all screens NOT on same board as new screen
* deactivate, but don't update
*/
if ( vp_old->vmm_port == vp_new->vmm_port ) {
T_CON(8, printf("deactivate on %x ", vp_new->vmm_port));
for (i = 0; i < vtcount; ++i) {
vpi = vtdata[i];
if ( vpi->vmm_port == vp_new->vmm_port ) {
/* deactivate, but don't update */
vpi->vmm_invis = ~0;
vpi->vmm_visible = VNKB_FALSE;
vpi->vmm_seg = vpi->vmm_mseg;
vpi->vmm_off = vpi->vmm_moff;
if( vpi->vmm_seg == 0 )
printf( "[1]vpi->vmm_seg = 0\n" );
PRINTV( "vt.back %d. seg %x off %x\n", i,
vpi->vmm_seg, vpi->vmm_off );
}
}
} else {
T_CON(8, printf("deactivate %x->%x ",
vp_old->vmm_port, vp_new->vmm_port));
for (i = 0; i < vtcount; ++i) {
vpi = vtdata[i];
if ( (vpi->vmm_port != vp_new->vmm_port)
&& (vpi->vmm_invis == 0) ) {
/* update, but don't deactivate */
vpi->vmm_invis = ~0;
vtupdscreen(i);
}
}
}
}
vtactivate(vp)
VTDATA *vp;
{
register VTDATA *vpi;
register i;
/*
* copy from screen contents from heap segment to video memory
* only if necessary
*/
if (vp->vmm_visible == VNKB_FALSE)
ffcopy (vp->vmm_moff, vp->vmm_mseg,
vp->vmm_voff, vp->vmm_vseg, TEXTBLOCK);
for (i = 0 ; i < vtcount ; ++ i) {
vpi = vtdata [i];
if (vpi->vmm_port == vp->vmm_port) {
vpi->vmm_invis = -1;
vpi->vmm_visible = VNKB_FALSE;
vpi->vmm_seg = vpi->vmm_mseg;
vpi->vmm_off = vpi->vmm_moff;
if (vpi->vmm_seg == 0)
printf ("[2]vpi->vmm_seg = 0\n");
PRINTV ("vt.back seg %x off %x\n",
vpi->vmm_seg, vpi->vmm_off);
}
}
/*
* Set new active terminal
*/
vp->vmm_invis = 0;
vp->vmm_visible = VNKB_TRUE;
vp->vmm_seg = vp->vmm_vseg;
vp->vmm_off = vp->vmm_voff;
if (vp->vmm_seg == 0)
printf ("vp->vmm_seg = 0\n");
}
/*
* update the terminal to match vtactive
*/
updterminal(index)
int index;
{
vtupdscreen(index);
updleds2();
}
/*
* Given a function key number (e.g. vt0),
* return the corresponding minor device number.
*
* Assume valid key number (VTKEY(fnum) is true) by the time we get here.
*/
int
vtkey_to_dev(fnum)
int fnum;
{
if (fnum >=vt0 && fnum <= vt15)
return fnum-vt0+1;
if (fnum >=color0 && fnum <= color15)
return (fnum-color0)|(VT_PHYSICAL|VT_HW_COLOR);
if (fnum >=mono0 && fnum <= mono15)
return (fnum-mono0)|(VT_PHYSICAL|VT_HW_MONO);
printf("vtkey_to_dev(%d)! ", fnum);
return 0;
}
#if GREEKFIX
/*
* ToggleGreek() must be called every time Alt+Enter is pressed.
* It toggles the "InGreek" flag and resets all others.
*
* ToGreek(unsigned *) returns FALSE if val is a dead key (Greek
* accent key) that must NOT be processed, TRUE otherwise.
*/
static int InGreek=0;
static int Tonos=0;
static int Dialytika=0;
static int UpperG[26] = {
128,129,150,131,132,148,130,134,136,141,137,138,139,
140,142,143,58,144,145,146,135,151,145,149,147,133};
static int LowerG[26] = {
152,153,175,155,156,173,154,158,160,165,161,162,163,
164,166,167,59,168,169,171,159,224,170,174,172,157};
static int VoyelG[7] = {152,156,158,160,166,172,224};
static int TonedG[7] = {225,226,227,229,230,231,233};
void
ToggleGreek()
{
InGreek ^= 1;
Tonos = 0;
Dialytika = 0;
return;
}
int
ToGreek(ip)
unsigned *ip;
{
unsigned i,j;
i = *ip;
/* If Not Greek exit */
if(!InGreek)
return 1;
/* Capture dead keys */
if(i == ';') {
Tonos ^= 1;
return 0;
}
if(i == ':') {
Dialytika ^= 1;
return 0;
}
/* Check if character translation needed */
if ((i >= 'A') && (i <= 'Z'))
i = UpperG[i - 'A'];
else if ((i >= 'a') && (i <= 'z'))
i = LowerG[i - 'a'];
else
return 1;
/* Check if any accent has to be added */
if (Tonos) {
Tonos = 0;
for(j = 0;j < 7;j++)
if (i == VoyelG[j]) {
i = TonedG[j];
break;
}
} else if (Dialytika) {
Dialytika=0;
if (i == 160)
i = 228;
else if (i == 172)
i = 232;
}
/* Exit point for translated characters */
*(ip) = i;
return 1;
}
#endif /* GREEKFIX */
/* End of nkb.c */
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