#include "u.h"
#include "lib.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "mem.h"
enum {
Data= 0x60, /* data port */
Status= 0x64, /* status port */
Inready= 0x01, /* input character ready */
Outbusy= 0x02, /* output busy */
Sysflag= 0x04, /* ??? */
Cmddata= 0x08, /* cmd==0, data==1 */
kbdinh= 0x10, /* keyboard inhibited */
Xtimeout= 0x20, /* transmit timeout */
Rtimeout= 0x40, /* receive timeout */
Parity= 0x80, /* 0==odd, 1==even */
Spec= 0x80,
PF= Spec|0x20, /* num pad function key */
View= Spec|0x00, /* view (shift window up) */
F= Spec|0x40, /* function key */
Shift= Spec|0x60,
Break= Spec|0x61,
Ctrl= Spec|0x62,
Latin= Spec|0x63,
Caps= Spec|0x64,
Num= Spec|0x65,
No= Spec|0x7F, /* no mapping */
Home= F|13,
Up= F|14,
Pgup= F|15,
Print= F|16,
Left= View,
Right= View,
End= '\r',
Down= View,
Pgdown= View,
Ins= F|20,
Del= 0x7F,
};
uchar kbtab[] =
{
[0x00] No, 0x1b, '1', '2', '3', '4', '5', '6',
[0x08] '7', '8', '9', '0', '-', '=', '\b', '\t',
[0x10] 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
[0x18] 'o', 'p', '[', ']', '\n', Ctrl, 'a', 's',
[0x20] 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
[0x28] '\'', '`', Shift, '\\', 'z', 'x', 'c', 'v',
[0x30] 'b', 'n', 'm', ',', '.', '/', Shift, No,
[0x38] Latin, ' ', Caps, F|1, F|2, F|3, F|4, F|5,
[0x40] F|6, F|7, F|8, F|9, F|10, Num, F|12, Home,
[0x48] No, No, No, No, No, No, No, No,
[0x50] No, No, No, No, No, No, No, F|11,
[0x58] F|12, No, No, No, No, No, No, No,
};
uchar kbtabshift[] =
{
[0x00] No, 0x1b, '!', '@', '#', '$', '%', '^',
[0x08] '&', '*', '(', ')', '_', '+', '\b', '\t',
[0x10] 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
[0x18] 'O', 'P', '{', '}', '\n', Ctrl, 'A', 'S',
[0x20] 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
[0x28] '"', '~', Shift, '|', 'Z', 'X', 'C', 'V',
[0x30] 'B', 'N', 'M', '<', '>', '?', Shift, No,
[0x38] Latin, ' ', Caps, F|1, F|2, F|3, F|4, F|5,
[0x40] F|6, F|7, F|8, F|9, F|10, Num, F|12, Home,
[0x48] No, No, No, No, No, No, No, No,
[0x50] No, No, No, No, No, No, No, F|11,
[0x58] F|12, No, No, No, No, No, No, No,
};
uchar kbtabesc1[] =
{
[0x00] No, No, No, No, No, No, No, No,
[0x08] No, No, No, No, No, No, No, No,
[0x10] No, No, No, No, No, No, No, No,
[0x18] No, No, No, No, No, Ctrl, No, No,
[0x20] No, No, No, No, No, No, No, No,
[0x28] No, No, No, No, No, No, No, No,
[0x30] No, No, No, No, No, No, No, Print,
[0x38] Latin, No, No, No, No, No, No, No,
[0x40] No, No, No, No, No, No, Break, Home,
[0x48] Up, Pgup, No, Down, No, Right, No, End,
[0x50] Left, Pgdown, Ins, Del, No, No, No, No,
[0x58] No, No, No, No, No, No, No, No,
};
struct latin
{
uchar l;
char c[2];
}latintab[] = {
'', "!!", /* spanish initial ! */
'', "c|", /* cent */
'', "c$", /* cent */
'', "l$", /* pound sterling */
'', "g$", /* general currency */
'', "y$", /* yen */
'', "j$", /* yen */
'', "||", /* broken vertical bar */
'', "SS", /* section symbol */
'', "\"\"", /* dieresis */
'', "cr", /* copyright */
'', "cO", /* copyright */
'', "sa", /* super a, feminine ordinal */
'', "<<", /* left angle quotation */
'', "no", /* not sign, hooked overbar */
'', "--", /* soft hyphen */
'', "rg", /* registered trademark */
'', "__", /* macron */
'', "s0", /* degree (sup o) */
'', "+-", /* plus-minus */
'', "s2", /* sup 2 */
'', "s3", /* sup 3 */
'', "''", /* grave accent */
'', "mu", /* mu */
'', "pg", /* paragraph (pilcrow) */
'', "..", /* centered . */
'', ",,", /* cedilla */
'', "s1", /* sup 1 */
'', "so", /* sup o */
'', ">>", /* right angle quotation */
'', "14", /* 1/4 */
'', "12", /* 1/2 */
'', "34", /* 3/4 */
'', "??", /* spanish initial ? */
'', "A`", /* A grave */
'', "A'", /* A acute */
'', "A^", /* A circumflex */
'', "A~", /* A tilde */
'', "A\"", /* A dieresis */
'', "A:", /* A dieresis */
'', "Ao", /* A circle */
'', "AO", /* A circle */
'', "Ae", /* AE ligature */
'', "AE", /* AE ligature */
'', "C,", /* C cedilla */
'', "E`", /* E grave */
'', "E'", /* E acute */
'', "E^", /* E circumflex */
'', "E\"", /* E dieresis */
'', "E:", /* E dieresis */
'', "I`", /* I grave */
'', "I'", /* I acute */
'', "I^", /* I circumflex */
'', "I\"", /* I dieresis */
'', "I:", /* I dieresis */
'', "D-", /* Eth */
'', "N~", /* N tilde */
'', "O`", /* O grave */
'', "O'", /* O acute */
'', "O^", /* O circumflex */
'', "O~", /* O tilde */
'', "O\"", /* O dieresis */
'', "O:", /* O dieresis */
'', "OE", /* O dieresis */
'', "Oe", /* O dieresis */
'', "xx", /* times sign */
'', "O/", /* O slash */
'', "U`", /* U grave */
'', "U'", /* U acute */
'', "U^", /* U circumflex */
'', "U\"", /* U dieresis */
'', "U:", /* U dieresis */
'', "UE", /* U dieresis */
'', "Ue", /* U dieresis */
'', "Y'", /* Y acute */
'', "P|", /* Thorn */
'', "Th", /* Thorn */
'', "TH", /* Thorn */
'', "ss", /* sharp s */
'', "a`", /* a grave */
'', "a'", /* a acute */
'', "a^", /* a circumflex */
'', "a~", /* a tilde */
'', "a\"", /* a dieresis */
'', "a:", /* a dieresis */
'', "ao", /* a circle */
'', "ae", /* ae ligature */
'', "c,", /* c cedilla */
'', "e`", /* e grave */
'', "e'", /* e acute */
'', "e^", /* e circumflex */
'', "e\"", /* e dieresis */
'', "e:", /* e dieresis */
'', "i`", /* i grave */
'', "i'", /* i acute */
'', "i^", /* i circumflex */
'', "i\"", /* i dieresis */
'', "i:", /* i dieresis */
'', "d-", /* eth */
'', "n~", /* n tilde */
'', "o`", /* o grave */
'', "o'", /* o acute */
'', "o^", /* o circumflex */
'', "o~", /* o tilde */
'', "o\"", /* o dieresis */
'', "o:", /* o dieresis */
'', "oe", /* o dieresis */
'', "-:", /* divide sign */
'', "o/", /* o slash */
'', "u`", /* u grave */
'', "u'", /* u acute */
'', "u^", /* u circumflex */
'', "u\"", /* u dieresis */
'', "u:", /* u dieresis */
'', "ue", /* u dieresis */
'', "y'", /* y acute */
'', "th", /* thorn */
'', "p|", /* thorn */
'', "y\"", /* y dieresis */
'', "y:", /* y dieresis */
0, 0,
};
KIOQ kbdq;
int
latin1(int k1, int k2)
{
int i;
struct latin *l;
for(l=latintab; l->l; l++)
if(k1==l->c[0] && k2==l->c[1])
return l->l;
return 0;
}
void
kbdinit(void)
{
initq(&kbdq);
setvec(Kbdvec, kbdintr, SEGIG);
}
/*
* get a byte from the keyboard
*/
int
kbdc(void)
{
int c;
for(;;){
while((inb(Status)&Inready)==0)
;
kbdintr(&c);
c = getc(&kbdq);
if(c != -1)
return c;
}
}
int
kbdputc(IOQ* q, int c)
{
screenputc(c);
putc(q, c);
}
/*
* keyboard interrupt
*/
void
kbdintr(void *a)
{
int c, nc;
static int esc1, esc2;
static int shift;
static int caps;
static int ctl;
static int num;
static int lstate, k1, k2;
int keyup;
/*
* get a character to be there
*/
c = inb(Data);
keyup = c&0x80;
c &= 0x7f;
if(c > sizeof kbtab){
print("unknown key %ux\n", c|keyup);
kbdputc(&kbdq, k1);
goto out;
}
/*
* e0's is the first of a 2 character sequence
*/
if(c == 0xe0){
esc1 = 1;
goto out;
} else if(c == 0xe1){
esc2 = 2;
goto out;
}
if(esc1){
c = kbtabesc1[c];
esc1 = 0;
} else if(esc2){
esc2--;
goto out;
} else if(shift)
c = kbtabshift[c];
else
c = kbtab[c];
if(caps && c<='z' && c>='a')
c += 'A' - 'a';
/*
* keyup only important for shifts
*/
if(keyup){
switch(c){
case Shift:
shift = 0;
break;
case Ctrl:
ctl = 0;
break;
}
goto out;
}
/*
* normal character
*/
if(!(c & Spec)){
if(ctl)
c &= 0x1f;
switch(lstate){
case 1:
k1 = c;
lstate = 2;
return;
case 2:
k2 = c;
lstate = 0;
c = latin1(k1, k2);
if(c == 0){
kbdputc(&kbdq, k1);
c = k2;
}
/* fall through */
default:
break;
}
} else {
switch(c){
case Caps:
caps ^= 1;
goto out;
case Num:
num ^= 1;
goto out;
case Shift:
shift = 1;
goto out;
case Latin:
lstate = 1;
goto out;
case Ctrl:
ctl = 1;
goto out;
}
}
kbdputc(&kbdq, c);
out:
INT0ENABLE; /* reenable interrupt */
return;
}