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kbd.c
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kbd.c
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// kbd.c --- keyboard handling
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "usim.h"
#include "ucode.h"
#include "iob.h"
#include "kbd.h"
// See SYS:LMWIN;COLD LISP for details.
//
// Keyboard translate table is a 3 X 64 array.
// 3 entries for each of 100 keys. First is vanilla, second shift, third top.
unsigned char kb_old_table[64][3] = {
{LM_K_BREAK, LM_K_BREAK, LM_K_NETWORK},
{LM_K_ESC, LM_K_ESC, LM_K_SYSTEM},
{'1', '!', '!'},
{'2', '"', '"'},
{'3', '#', '#'},
{'4', '$', '$'},
{'5', '%', '%'},
{'6', '&', '&'},
{'7', '\'', '\''},
{'8', '(', '('},
{'9', ')', ')'},
{'0', '_', '_'},
{'-', '=', '='},
{'@', '`', '`'},
{'^', '~', '~'},
{LM_K_BS, LM_K_BS, LM_K_BS},
{LM_K_CALL, LM_K_CALL, LM_K_ABORT},
{LM_K_CLEAR, LM_K_CLEAR, LM_K_CLEAR},
{LM_K_TAB, LM_K_TAB, LM_K_TAB},
{'', '', ''},
{'q', 'Q', ''},
{'w', 'W', ' '},
{'e', 'E', ''},
{'r', 'R', ''},
{'t', 'T', ''},
{'y', 'Y', ''},
{'u', 'U', ''},
{'i', 'I', ''},
{'o', 'O', ''},
{'p', 'P', ' '},
{'[', '{', '{'},
{']', '}', '}'},
{'\\', '|', '|'},
{'/', '', ''},
{' ', LM_K_CR, LM_K_NULL},
{LM_K_CR, LM_K_TAB, LM_K_TAB},
{LM_K_FORM, LM_K_FORM, LM_K_FORM},
{LM_K_VT, LM_K_VT, LM_K_VT},
{LM_K_RUBOUT, LM_K_RUBOUT, LM_K_RUBOUT},
{'a', 'A', ' '},
{'s', 'S', ' '},
{'d', 'D', ' '},
{'f', 'F', ''},
{'g', 'G', ''},
{'h', 'H', LM_K_HELP},
{'j', 'J', ''},
{'k', 'K', ''},
{'l', 'L', ''},
{';', '+', '+'},
{':', '*', '*'},
{LM_K_CR, LM_K_CR, LM_K_END},
{LM_K_LINE, LM_K_LINE, LM_K_LINE},
{LM_K_BACK_NEXT, LM_K_BACK_NEXT, LM_K_BACK_NEXT},
// #\SHIFT-LOCK
// #\LEFT-TOP
// #\LEFT-SHIFT
{'z', 'Z', ''},
{'x', 'X', ''},
{'c', 'C', ''},
{'v', 'V', ''},
{'b', 'B', ''},
{'n', 'N', ''},
{'m', 'M', ''},
{',', '<', '<'},
{'.', '>', '>'},
{'/', '?', '?'},
// #\RIGHT-SHIFT
// #\RIGHT-TOP
// #\LEFT-META
// #\LEFT-CTRL
{LM_K_SP, LM_K_SP, LM_K_SP},
// #\RIGHT-CTRL
// #\RIGHT-META
};
// The second dimension is 200 long and indexed by keycode.
// The first dimension is the shifts:
// 0 unshifted
// 1 shift
// 2 top
// 3 greek
// 4 shift greek
// Elements in the table are 16-bit unsigned numbers.
// Bit 15 on and bit 14 on means undefined code, ignore and beep.
// Bit 15 on and bit 14 off means low bits are shift for bit in KBD-SHIFTS
// (40 octal for right-hand key of a pair)
// Bit 15 off is ordinary code.
unsigned char kb_new_table[128][4] = {
// #\BACK-NEXT ;100 macro
// #\ESC ;40 terminal
// #\QUOTE ;120 Quote
// #\BS ;160 Overstrike
// #\CLEAR ;110 Clear Input
// #\FORM ;50 clear screen
// #\HOLD-OUTPUT ;30 hold output
// #\STOP-OUTPUT ;170 Stop Output
// #\ABORT ;67 Abort
// #\BREAK ;167 Break
// #\RESUME ;47 resume
// #\CALL ;107 Call
// #\ROMAN-I ;101 Roman I
// #\ROMAN-II ;1 Roman II
// #\SYSTEM ;141 system
// (#/: 14 14) ;21 plus-minus
// (#/1 #/! #/!) ;121 One
// (#/2 #/@ #/@) ;61 Two
// (#/3 #/# #/#) ;161 Three
// (#/4 #/$ #/$) ;11 Four
// (#/5 #/% #/%) ;111 Five
// (#/6 #/^ #/^) ;51 Six
// (#/7 #/& #/&) ;151 Seven
// (#/8 #/* #/*) ;31 Eight
// (#/9 #/( #/( ) ;71 Nine
// (#/0 #/) #/)) ;171 Zero
// (#/- #/_ #/_) ;131 Minus
// (#/= #/+ #/+) ;126 Equals
// (#/{ 140000 140000) ;166 {
// (#/} 140000 140000) ;146 }
// #\STATUS ;46 status
// #\HAND-UP ;106 Up Thumb
// (#\HAND-DOWN #\HAND-DOWN #\HAND-DOWN #/ #/) ;176 Down Thumb
// #\ROMAN-III ;102 Roman III
// #\ROMAN-IV ;2 Roman IV
// #\NETWORK ;42 network
// #\TAB ;22 tab
// (#/q #/Q #/) ;122 Q
// (#/w #/W #/ ) ;62 W
// (#/e #/E #/ #/) ;162 E
// (#/r #/R #/) ;12 R
// (#/t #/T #/) ;112 T
// (#/y #/Y #/) ;52 Y
// (#/u #/U #/) ;152 U
// (#/i #/I #/) ;32 I
// (#/o #/O #/) ;72 O
// (#/p #/P #/ #/) ;172 P
// (#/( #/[ #/[) ;132 Open parenthesis
// (#/) #/] #/]) ;137 Close parenthesis
// (#/` #/~ #/~ #/) ;77 back quote
// (#/\ #/| #/|) ;37 Backslash
// #\DELETE ;157 Delete
// (#\HAND-LEFT #\HAND-LEFT #\HAND-LEFT #/ #/) ;117 Hand Left
// #\HAND-RIGHT ;17 Hand Right
// 100011 ;3 Mode lock
// #/ ;143 Alt Mode
// #\RUBOUT ;23 rubout
// (#/a #/A 140000 #/) ;123 A
// (#/s #/S) ;63 S
// (#/d #/D 140000 12) ;163 D/delta
// (#/f #/F) ;13 F
// (#/g #/G #/ 11) ;113 G/gamma
// (#/h #/H #/) ;53 H
// (#/j #/J #/) ;153 J
// (#/k #/K #/) ;33 K
// (#/l #/L #/ 10) ;73 L/lambda
// (#/; #/: #/:) ;173 Semicolon
// (#/' #/" #/" 0) ;133 Apostrophe/center-dot
// #\CR ;136 Return
// #\LINE ;36 Line
// #\END ;156 End
// #\HELP ;116 Help
// 100003 ;125 Caps Lock
// 100002 ;104 Left Top
// 100001 ;44 Left Greek
// 100000 ;24 Left Shift
// (#/z #/Z) ;124 Z
// (#/x #/X) ;64 X
// (#/c #/C #/) ;164 C
// (#/v #/V) ;14 V
// (#/b #/B #/ #/) ;114 B
// (#/n #/N #/ ) ;54 N
// (#/m #/M #/ ) ;154 M
// (#/, #/< #/<) ;34 comma
// (#/. #/> #/>) ;74 period
// (#// #/? #/? 177) ;174 Question/Integral
// 100040 ;25 Right Shift
// 100041 ;35 Right Greek
// 100042 ;155 Right Top
// () ;115 Repeat
// 100008 ;15 Alt Lock
// 100007 ;145 Left Hyper
// 100006 ;5 Left super
// 100005 ;45 Left Meta
// 100004 ;20 Left control
// #\SP ;134 Space
// 100044 ;26 Right control
// 100045 ;165 Right Meta
// 100046 ;65 Right Super
// 100047 ;175 Right Hyper
};
unsigned int kbd_key_scan;
unsigned short okb_to_scancode[256][4];
#define KEY_QUEUE_LEN 10
static int key_queue[KEY_QUEUE_LEN];
static int key_queue_optr = 0;
static int key_queue_iptr = 0;
static int key_queue_free = KEY_QUEUE_LEN;
void
queue_key_event(int ev)
{
int v;
v = (1 << 16) | ev;
if (key_queue_free > 0) {
traceio("queue_key_event() - queuing 0%o, q len before %d\n", v, KEY_QUEUE_LEN - key_queue_free);
key_queue_free--;
key_queue[key_queue_optr] = v;
key_queue_optr = (key_queue_optr + 1) % KEY_QUEUE_LEN;
} else {
fprintf(stderr, "IOB key queue full!\n");
if (!(iob_csr & (1 << 5)) && (iob_csr & (1 << 2))) {
iob_csr |= 1 << 5;
fprintf(stderr, "queue_key_event generating interrupt\n");
assert_unibus_interrupt(0260);
}
}
}
void
dequeue_key_event(void)
{
if (iob_csr & (1 << 5)) // Already something to be read.
return;
if (key_queue_free < KEY_QUEUE_LEN) {
int v = key_queue[key_queue_iptr];
traceio("dequeue_key_event() - dequeuing 0%o, q len before %d\n", v, KEY_QUEUE_LEN - key_queue_free);
key_queue_iptr = (key_queue_iptr + 1) % KEY_QUEUE_LEN;
key_queue_free++;
kbd_key_scan = (1 << 16) | v;
if (iob_csr & (1 << 2)) { // Keyboard interrupt enabled?
iob_csr |= 1 << 5;
fprintf(stderr, "dequeue_key_event generating interrupt (q len after %d)\n", KEY_QUEUE_LEN - key_queue_free);
assert_unibus_interrupt(0260);
}
}
}
void
kbd_key_event(int code, int keydown)
{
int v;
traceio("key_event(code=%x, keydown=%x)\n", code, keydown);
v = ((!keydown) << 8) | code;
if (iob_csr & (1 << 5))
queue_key_event(v); // Already something there, queue this.
else {
kbd_key_scan = (1 << 16) | v;
traceio("key_event() - 0%o\n", kbd_key_scan);
if (iob_csr & (1 << 2)) {
iob_csr |= 1 << 5;
assert_unibus_interrupt(0260);
}
}
}
void
kbd_warm_boot_key(void)
{
// Send a Return to get the machine booted.
kbd_key_event(50, 0);
}
void
kbd_init(void)
{
// ---!!! Handle multiple modifiers!
memset((char *) okb_to_scancode, 0, sizeof(okb_to_scancode));
// Walk unshifted old keyboard table.
for (int i = 0; i < 64; i++) {
char k;
k = kb_old_table[i][0];
okb_to_scancode[(int) k][0] = i;
}
// Add shifts.
for (int i = 0; i < 256; i++)
okb_to_scancode[i][1] = okb_to_scancode[i][0] | (3 << 6);
// Modify mapping to match present-day US keyboard layout.
okb_to_scancode['`'][0] = 015 | (3 << 6);
okb_to_scancode['`'][1] = 016 | (3 << 6);
okb_to_scancode['\''][0] = 010 | (3 << 6);
okb_to_scancode['\''][1] = 3 | (3 << 6);
okb_to_scancode['='][0] = 014 | (3 << 6);
okb_to_scancode['2'][1] = 015;
okb_to_scancode['6'][1] = 016;
okb_to_scancode['7'][1] = 7 | (3 << 6);
okb_to_scancode['8'][1] = 061 | (3 << 6);
okb_to_scancode['9'][1] = 011 | (3 << 6);
okb_to_scancode['0'][1] = 012 | (3 << 6);
okb_to_scancode['-'][1] = 013 | (3 << 6);
okb_to_scancode['='][1] = 060 | (3 << 6);
okb_to_scancode[';'][1] = 061;
okb_to_scancode[':'][1] = 061;
okb_to_scancode['!'][1] = 2 | (3 << 6);
okb_to_scancode['"'][1] = 3 | (3 << 6);
okb_to_scancode['#'][1] = 4 | (3 << 6);
okb_to_scancode['$'][1] = 5 | (3 << 6);
okb_to_scancode['%'][1] = 6 | (3 << 6);
okb_to_scancode['&'][1] = 7 | (3 << 6);
okb_to_scancode['('][1] = 011 | (3 << 6);
okb_to_scancode[')'][1] = 012 | (3 << 6);
okb_to_scancode['_'][1] = 013 | (3 << 6);
okb_to_scancode['~'][1] = 016 | (3 << 6);
okb_to_scancode['@'][1] = 13;
okb_to_scancode['^'][1] = 14;
okb_to_scancode['Q'][1] = 20 | (3 << 6);
okb_to_scancode['W'][1] = 21 | (3 << 6);
okb_to_scancode['E'][1] = 22 | (3 << 6);
okb_to_scancode['R'][1] = 23 | (3 << 6);
okb_to_scancode['T'][1] = 24 | (3 << 6);
okb_to_scancode['Y'][1] = 25 | (3 << 6);
okb_to_scancode['U'][1] = 26 | (3 << 6);
okb_to_scancode['I'][1] = 27 | (3 << 6);
okb_to_scancode['O'][1] = 28 | (3 << 6);
okb_to_scancode['P'][1] = 29 | (3 << 6);
okb_to_scancode['{'][1] = 30 | (3 << 6);
okb_to_scancode['}'][1] = 31 | (3 << 6);
okb_to_scancode['|'][1] = 32 | (3 << 6);
okb_to_scancode['A'][1] = 39 | (3 << 6);
okb_to_scancode['S'][1] = 40 | (3 << 6);
okb_to_scancode['D'][1] = 41 | (3 << 6);
okb_to_scancode['F'][1] = 42 | (3 << 6);
okb_to_scancode['G'][1] = 43 | (3 << 6);
okb_to_scancode['H'][1] = 44 | (3 << 6);
okb_to_scancode['J'][1] = 45 | (3 << 6);
okb_to_scancode['K'][1] = 46 | (3 << 6);
okb_to_scancode['L'][1] = 47 | (3 << 6);
okb_to_scancode['+'][1] = 48 | (3 << 6);
okb_to_scancode['*'][1] = 061 | (3 << 6);
okb_to_scancode['Z'][1] = 53 | (3 << 6);
okb_to_scancode['X'][1] = 54 | (3 << 6);
okb_to_scancode['C'][1] = 55 | (3 << 6);
okb_to_scancode['V'][1] = 56 | (3 << 6);
okb_to_scancode['B'][1] = 57 | (3 << 6);
okb_to_scancode['N'][1] = 58 | (3 << 6);
okb_to_scancode['M'][1] = 59 | (3 << 6);
okb_to_scancode['<'][1] = 60 | (3 << 6);
okb_to_scancode['>'][1] = 61 | (3 << 6);
okb_to_scancode['?'][1] = 62 | (3 << 6);
// Map Delete to Rubout.
okb_to_scancode[0x7f][0] = 046;
okb_to_scancode[0x08][0] = 046;
// Map Tab to Tab.
okb_to_scancode[9][0] = 0211;
// Map Escape to Escape.
okb_to_scancode[0x1b][0] = 0204;
}