home *** CD-ROM | disk | FTP | other *** search
- /*-
- * 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.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)kbd.c 7.4 (Berkeley) 5/4/91
- */
-
- #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 */
- }
-