/*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * %sccs.include.redist.c% * * @(#)kbd.c 7.4 (Berkeley) 05/04/91 */ #define L 0x01 /* locking function */ #define SHF 0x02 /* keyboard shift */ #define ALT 0x04 /* alternate shift -- alternate chars */ #define NUM 0x08 /* numeric shift cursors vs. numeric */ #define CTL 0x10 /* control shift -- allows ctl function */ #define CPS 0x20 /* caps shift -- swaps case of letter */ #define ASCII 0x40 /* ascii code for this key */ #define STP 0x80 /* stop output */ typedef unsigned char u_char; u_char inb(); u_char action[] = { 0, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 0- 7 */ ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 8-15 */ ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 16-23 */ ASCII, ASCII, ASCII, ASCII, ASCII, CTL, ASCII, ASCII, /* scan 24-31 */ ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 32-39 */ ASCII, ASCII, SHF , ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 40-47 */ ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, SHF, ASCII, /* scan 48-55 */ ALT, ASCII, CPS|L, 0, 0, ASCII, 0, 0, /* scan 56-63 */ 0, 0, 0, 0, 0, NUM|L, STP|L, ASCII, /* scan 64-71 */ ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 72-79 */ ASCII, ASCII, ASCII, ASCII, 0, 0, 0, 0, /* scan 80-87 */ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; u_char unshift[] = { /* no shift */ 0, 033 , '1' , '2' , '3' , '4' , '5' , '6' , /* scan 0- 7 */ '7' , '8' , '9' , '0' , '-' , '=' , 0177 ,'\t' , /* scan 8-15 */ 'q' , 'w' , 'e' , 'r' , 't' , 'y' , 'u' , 'i' , /* scan 16-23 */ 'o' , 'p' , '[' , ']' , '\r' , CTL , 'a' , 's' , /* scan 24-31 */ 'd' , 'f' , 'g' , 'h' , 'j' , 'k' , 'l' , ';' , /* scan 32-39 */ '\'' , '`' , SHF , '\\' , 'z' , 'x' , 'c' , 'v' , /* scan 40-47 */ 'b' , 'n' , 'm' , ',' , '.' , '/' , SHF , '*', /* scan 48-55 */ ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */ 0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */ '8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */ '2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; u_char shift[] = { /* shift shift */ 0, 033 , '!' , '@' , '#' , '$' , '%' , '^' , /* scan 0- 7 */ '&' , '*' , '(' , ')' , '_' , '+' , 0177 ,'\t' , /* scan 8-15 */ 'Q' , 'W' , 'E' , 'R' , 'T' , 'Y' , 'U' , 'I' , /* scan 16-23 */ 'O' , 'P' , '[' , ']' , '\r' , CTL , 'A' , 'S' , /* scan 24-31 */ 'D' , 'F' , 'G' , 'H' , 'J' , 'K' , 'L' , ':' , /* scan 32-39 */ '"' , '~' , SHF , '|' , 'Z' , 'X' , 'C' , 'V' , /* scan 40-47 */ 'B' , 'N' , 'M' , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */ ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */ 0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */ '8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */ '2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; u_char ctl[] = { /* CTL shift */ 0, 033 , '!' , 000 , '#' , '$' , '%' , 036 , /* scan 0- 7 */ '&' , '*' , '(' , ')' , 037 , '+' , 034 ,'\177', /* scan 8-15 */ 021 , 027 , 005 , 022 , 024 , 031 , 025 , 011 , /* scan 16-23 */ 017 , 020 , 033 , 035 , '\r' , CTL , 001 , 013 , /* scan 24-31 */ 004 , 006 , 007 , 010 , 012 , 013 , 014 , ';' , /* scan 32-39 */ '\'' , '`' , SHF , 034 , 032 , 030 , 003 , 026 , /* scan 40-47 */ 002 , 016 , 015 , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */ ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */ CPS|L, 0, 0, 0, 0, 0, 0, 0, /* scan 64-71 */ 0, 0, 0, 0, 0, 0, 0, 0, /* scan 72-79 */ 0, 0, 0, 0, 0, 0, 0, 0, /* scan 80-87 */ 0, 0, 033, '7' , '4' , '1' , 0, NUM|L, /* scan 88-95 */ '8' , '5' , '2' , 0, STP|L, '9' , '6' , '3' , /*scan 96-103*/ '.' , 0, '*' , '-' , '+' , 0, 0, 0, /*scan 104-111*/ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ; #ifdef notdef struct key { u_short action; /* how this key functions */ char ascii[8]; /* ascii result character indexed by shifts */ }; #endif u_char shfts, ctls, alts, caps, num, stp; #define KBSTATP 0x64 /* kbd status port */ #define KBS_INP_BUF_FUL 0x02 /* kbd char ready */ #define KBDATAP 0x60 /* kbd data port */ #define KBSTATUSPORT 0x61 /* kbd status */ u_char odt; u_char kbd() { u_char dt, brk, act; loop: while(inb(0x64)&1 == 0); dt = inb(0x60); do { while(inb(0x64)&1 == 0); } while(dt == inb(0x60)); odt = dt; brk = dt & 0x80 ; dt = dt & 0x7f ; act = action[dt]; if (act&SHF) { if(brk) shfts = 0; else shfts = 1; } if (act&ALT) { if(brk) alts = 0; else alts = 1; } if (act&NUM) { if (act&L) { if(!brk) num ^= 1; } else if(brk) num = 0; else num = 1; } if (act&CTL) { if(brk) ctls = 0; else ctls = 1; } if (act&CPS) { if (act&L) { if(!brk) caps ^= 1; } else if(brk) caps = 0; else caps = 1; } if (act&STP) { if (act&L) { if(!brk) stp ^= 1; } else if(brk) stp = 0; else stp = 1; } if(ctl && alts && dt == 83) exit(); if ((act&ASCII) && !brk) { u_char chr; if (shfts){ chr = shift[dt] ; } else { if (ctls) { chr = ctl[dt] ; } else { chr = unshift[dt] ; } } if (caps && (chr >= 'a' && chr <= 'z')) { chr -= 'a' - 'A' ; } /*do while(inb(0x64)&1 == 0) ; while (inb(0x60) == (chr | 0x80)); while(inb(0x64)&1 == 1) inb(0x60);A*/ return(chr); } goto loop; } scankbd() { u_char c; c = inb(0x60); if (c == 0xaa) { odt = 0x2a; return (0); } if (c == 0xfa) { odt = 0x7a; return (0); } c &= 0x7f; if ( (odt&0x7f) == c )return(0); if(odt == 0) { odt = c; return(0); } return(kbd()); } kbdreset() { u_char c; /* Enable interrupts and keyboard controller */ while (inb(0x64)&2); outb(0x64,0x60); while (inb(0x64)&2); outb(0x60,0x4D); /* Start keyboard stuff RESET */ while (inb(0x64)&2); /* wait input ready */ outb(0x60,0xFF); /* RESET */ while((c=inb(0x60))!=0xFA) ; /* While we are here, defeat gatea20 */ while (inb(0x64)&2); /* wait input ready */ outb(0x64,0xd1); while (inb(0x64)&2); /* wait input ready */ outb(0x60,0xdf); } u_char getchar() { u_char c; c = kbd(); if (c == '\b' || c == '\177') return(c); if (c == '\r') c = '\n'; putchar(c); return(c); } reset_cpu() { while (inb(0x64)&2); /* wait input ready */ outb(0x64,0xFE); /* Reset Command */ wait(4000000); /* NOTREACHED */ }