projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a7ab625b WN |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| be77d923 | 8 | * %sccs.include.redist.c% |
| a7ab625b | 9 | * |
| 34e93d8e | 10 | * @(#)kbd.c 7.4 (Berkeley) %G% |
| a7ab625b WN |
11 | */ |
| 12 | ||
| 13 | #define L 0x01 /* locking function */ | |
| 14 | #define SHF 0x02 /* keyboard shift */ | |
| 15 | #define ALT 0x04 /* alternate shift -- alternate chars */ | |
| 16 | #define NUM 0x08 /* numeric shift cursors vs. numeric */ | |
| 17 | #define CTL 0x10 /* control shift -- allows ctl function */ | |
| 18 | #define CPS 0x20 /* caps shift -- swaps case of letter */ | |
| 19 | #define ASCII 0x40 /* ascii code for this key */ | |
| 20 | #define STP 0x80 /* stop output */ | |
| 21 | ||
| 22 | typedef unsigned char u_char; | |
| 23 | ||
| 24 | u_char inb(); | |
| 25 | ||
| 26 | u_char action[] = { | |
| 27 | 0, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 0- 7 */ | |
| 28 | ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 8-15 */ | |
| 29 | ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 16-23 */ | |
| 30 | ASCII, ASCII, ASCII, ASCII, ASCII, CTL, ASCII, ASCII, /* scan 24-31 */ | |
| 31 | ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 32-39 */ | |
| 32 | ASCII, ASCII, SHF , ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 40-47 */ | |
| 33 | ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, SHF, ASCII, /* scan 48-55 */ | |
| 34 | ALT, ASCII, CPS|L, 0, 0, ASCII, 0, 0, /* scan 56-63 */ | |
| 35 | 0, 0, 0, 0, 0, NUM|L, STP|L, ASCII, /* scan 64-71 */ | |
| 36 | ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 72-79 */ | |
| 37 | ASCII, ASCII, ASCII, ASCII, 0, 0, 0, 0, /* scan 80-87 */ | |
| 38 | 0,0,0,0,0,0,0,0, | |
| 39 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, | |
| 40 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; | |
| 41 | ||
| 42 | u_char unshift[] = { /* no shift */ | |
| 43 | 0, 033 , '1' , '2' , '3' , '4' , '5' , '6' , /* scan 0- 7 */ | |
| 44 | '7' , '8' , '9' , '0' , '-' , '=' , 0177 ,'\t' , /* scan 8-15 */ | |
| 45 | ||
| 46 | 'q' , 'w' , 'e' , 'r' , 't' , 'y' , 'u' , 'i' , /* scan 16-23 */ | |
| 47 | 'o' , 'p' , '[' , ']' , '\r' , CTL , 'a' , 's' , /* scan 24-31 */ | |
| 48 | ||
| 49 | 'd' , 'f' , 'g' , 'h' , 'j' , 'k' , 'l' , ';' , /* scan 32-39 */ | |
| 50 | '\'' , '`' , SHF , '\\' , 'z' , 'x' , 'c' , 'v' , /* scan 40-47 */ | |
| 51 | ||
| 52 | 'b' , 'n' , 'm' , ',' , '.' , '/' , SHF , '*', /* scan 48-55 */ | |
| 53 | ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */ | |
| 54 | ||
| 55 | 0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */ | |
| 56 | '8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */ | |
| 57 | ||
| 58 | '2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */ | |
| 59 | 0,0,0,0,0,0,0,0, | |
| 60 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, | |
| 61 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; | |
| 62 | ||
| 63 | u_char shift[] = { /* shift shift */ | |
| 64 | 0, 033 , '!' , '@' , '#' , '$' , '%' , '^' , /* scan 0- 7 */ | |
| 65 | '&' , '*' , '(' , ')' , '_' , '+' , 0177 ,'\t' , /* scan 8-15 */ | |
| 66 | 'Q' , 'W' , 'E' , 'R' , 'T' , 'Y' , 'U' , 'I' , /* scan 16-23 */ | |
| 67 | 'O' , 'P' , '[' , ']' , '\r' , CTL , 'A' , 'S' , /* scan 24-31 */ | |
| 68 | 'D' , 'F' , 'G' , 'H' , 'J' , 'K' , 'L' , ':' , /* scan 32-39 */ | |
| 69 | '"' , '~' , SHF , '|' , 'Z' , 'X' , 'C' , 'V' , /* scan 40-47 */ | |
| 70 | 'B' , 'N' , 'M' , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */ | |
| 71 | ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */ | |
| 72 | 0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */ | |
| 73 | '8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */ | |
| 74 | '2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */ | |
| 75 | 0,0,0,0,0,0,0,0, | |
| 76 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, | |
| 77 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; | |
| 78 | ||
| 79 | u_char ctl[] = { /* CTL shift */ | |
| 80 | 0, 033 , '!' , 000 , '#' , '$' , '%' , 036 , /* scan 0- 7 */ | |
| 81 | '&' , '*' , '(' , ')' , 037 , '+' , 034 ,'\177', /* scan 8-15 */ | |
| 82 | 021 , 027 , 005 , 022 , 024 , 031 , 025 , 011 , /* scan 16-23 */ | |
| 83 | 017 , 020 , 033 , 035 , '\r' , CTL , 001 , 013 , /* scan 24-31 */ | |
| 84 | 004 , 006 , 007 , 010 , 012 , 013 , 014 , ';' , /* scan 32-39 */ | |
| 85 | '\'' , '`' , SHF , 034 , 032 , 030 , 003 , 026 , /* scan 40-47 */ | |
| 86 | 002 , 016 , 015 , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */ | |
| 87 | ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */ | |
| 88 | CPS|L, 0, 0, 0, 0, 0, 0, 0, /* scan 64-71 */ | |
| 89 | 0, 0, 0, 0, 0, 0, 0, 0, /* scan 72-79 */ | |
| 90 | 0, 0, 0, 0, 0, 0, 0, 0, /* scan 80-87 */ | |
| 91 | 0, 0, 033, '7' , '4' , '1' , 0, NUM|L, /* scan 88-95 */ | |
| 92 | '8' , '5' , '2' , 0, STP|L, '9' , '6' , '3' , /*scan 96-103*/ | |
| 93 | '.' , 0, '*' , '-' , '+' , 0, 0, 0, /*scan 104-111*/ | |
| 94 | 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; | |
| 95 | ||
| 96 | #ifdef notdef | |
| 97 | struct key { | |
| 98 | u_short action; /* how this key functions */ | |
| 99 | char ascii[8]; /* ascii result character indexed by shifts */ | |
| 100 | }; | |
| 101 | #endif | |
| 102 | ||
| 103 | u_char shfts, ctls, alts, caps, num, stp; | |
| 104 | ||
| 105 | #define KBSTATP 0x64 /* kbd status port */ | |
| 106 | #define KBS_INP_BUF_FUL 0x02 /* kbd char ready */ | |
| 107 | #define KBDATAP 0x60 /* kbd data port */ | |
| 108 | #define KBSTATUSPORT 0x61 /* kbd status */ | |
| 109 | ||
| 110 | u_char odt; | |
| 111 | ||
| 112 | u_char kbd() { | |
| 113 | u_char dt, brk, act; | |
| 114 | ||
| 115 | loop: | |
| be77d923 WN |
116 | while(inb(0x64)&1 == 0); |
| 117 | dt = inb(0x60); | |
| a7ab625b | 118 | do { |
| be77d923 WN |
119 | while(inb(0x64)&1 == 0); |
| 120 | } while(dt == inb(0x60)); | |
| a7ab625b WN |
121 | odt = dt; |
| 122 | ||
| 123 | brk = dt & 0x80 ; dt = dt & 0x7f ; | |
| 124 | ||
| 125 | act = action[dt]; | |
| 126 | if (act&SHF) { | |
| 127 | if(brk) shfts = 0; else shfts = 1; | |
| 128 | } | |
| 129 | if (act&ALT) { | |
| 130 | if(brk) alts = 0; else alts = 1; | |
| 131 | } | |
| 132 | if (act&NUM) { | |
| 133 | if (act&L) { | |
| 134 | if(!brk) num ^= 1; | |
| 135 | } else if(brk) num = 0; else num = 1; | |
| 136 | } | |
| 137 | if (act&CTL) { | |
| 138 | if(brk) ctls = 0; else ctls = 1; | |
| 139 | } | |
| 140 | if (act&CPS) { | |
| 141 | if (act&L) { | |
| 142 | if(!brk) caps ^= 1; | |
| 143 | } else if(brk) caps = 0; else caps = 1; | |
| 144 | } | |
| 145 | if (act&STP) { | |
| 146 | if (act&L) { | |
| 147 | if(!brk) stp ^= 1; | |
| 148 | } else if(brk) stp = 0; else stp = 1; | |
| 149 | } | |
| be77d923 | 150 | if(ctl && alts && dt == 83) exit(); |
| a7ab625b WN |
151 | if ((act&ASCII) && !brk) { |
| 152 | u_char chr; | |
| 153 | ||
| 154 | if (shfts){ | |
| 155 | chr = shift[dt] ; } else { | |
| 156 | if (ctls) { | |
| 157 | chr = ctl[dt] ; } else { | |
| 158 | chr = unshift[dt] ; } } | |
| 159 | if (caps && (chr >= 'a' && chr <= 'z')) { | |
| 160 | chr -= 'a' - 'A' ; | |
| 161 | } | |
| be77d923 WN |
162 | /*do |
| 163 | while(inb(0x64)&1 == 0) ; | |
| 164 | while (inb(0x60) == (chr | 0x80)); | |
| 165 | while(inb(0x64)&1 == 1) inb(0x60);A*/ | |
| a7ab625b WN |
166 | return(chr); |
| 167 | } | |
| 168 | goto loop; | |
| 169 | } | |
| be77d923 WN |
170 | |
| 171 | scankbd() { | |
| 172 | u_char c; | |
| 173 | ||
| 174 | c = inb(0x60); | |
| 175 | if (c == 0xaa) { odt = 0x2a; return (0); } | |
| 176 | if (c == 0xfa) { odt = 0x7a; return (0); } | |
| 177 | c &= 0x7f; | |
| 178 | ||
| 179 | if ( (odt&0x7f) == c )return(0); | |
| 180 | if(odt == 0) { odt = c; return(0); } | |
| 181 | return(kbd()); | |
| 182 | } | |
| 183 | ||
| 184 | kbdreset() | |
| 185 | { | |
| 186 | u_char c; | |
| 187 | ||
| 188 | /* Enable interrupts and keyboard controller */ | |
| 189 | while (inb(0x64)&2); outb(0x64,0x60); | |
| 190 | while (inb(0x64)&2); outb(0x60,0x4D); | |
| 191 | ||
| 192 | /* Start keyboard stuff RESET */ | |
| 193 | while (inb(0x64)&2); /* wait input ready */ | |
| 194 | outb(0x60,0xFF); /* RESET */ | |
| 195 | ||
| 196 | while((c=inb(0x60))!=0xFA) ; | |
| 197 | ||
| 198 | /* While we are here, defeat gatea20 */ | |
| 199 | while (inb(0x64)&2); /* wait input ready */ | |
| 200 | outb(0x64,0xd1); | |
| 201 | while (inb(0x64)&2); /* wait input ready */ | |
| 202 | outb(0x60,0xdf); | |
| 203 | } | |
| 204 | ||
| 205 | u_char getchar() { | |
| 206 | u_char c; | |
| 207 | ||
| 208 | c = kbd(); | |
| 34e93d8e | 209 | if (c == '\b' || c == '\177') return(c); |
| be77d923 WN |
210 | if (c == '\r') c = '\n'; |
| 211 | putchar(c); | |
| 212 | return(c); | |
| 213 | } | |
| 214 | ||
| 215 | reset_cpu() { | |
| 216 | ||
| 217 | while (inb(0x64)&2); /* wait input ready */ | |
| 218 | outb(0x64,0xFE); /* Reset Command */ | |
| 219 | wait(4000000); | |
| 220 | /* NOTREACHED */ | |
| 221 | } |