141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
/*
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* Copyright (c) 1992, 1993, 1996
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* Berkeley Software Design, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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*
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* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* BSDI int16.c,v 2.2 1996/04/08 19:32:47 bostic Exp
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*
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* $FreeBSD$
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*/
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#include "doscmd.h"
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#define K_NEXT *(u_short *)0x41a
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#define K_FREE *(u_short *)0x41c
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#define KbdEmpty() (K_NEXT == K_FREE)
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#define HWM 16
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volatile int poll_cnt = 0;
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void
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wakeup_poll(void)
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{
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if (poll_cnt <= 0)
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poll_cnt = HWM;
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}
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void
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reset_poll(void)
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{
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poll_cnt = HWM;
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}
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void
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sleep_poll(void)
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{
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#if 0
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printf("sleep_poll: poll_cnt=%d\n", poll_cnt);
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if (poll_cnt == 14)
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tmode = 1;
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#endif
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if (--poll_cnt <= 0) {
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poll_cnt = 0;
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while (KbdEmpty() && poll_cnt <= 0) {
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#if 0
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softint(0x28);
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#endif
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if (KbdEmpty() && poll_cnt <= 0)
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tty_pause();
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}
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}
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}
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void
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int16(regcontext_t *REGS)
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{
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int c;
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if (!xmode && !raw_kbd) {
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if (vflag) dump_regs(REGS);
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fatal ("int16 func 0x%x only supported in X mode\n", R_AH);
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}
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switch(R_AH) {
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case 0x00:
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case 0x10: /* Get enhanced keystroke */
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poll_cnt = 16;
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while (KbdEmpty())
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tty_pause();
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R_AX = KbdRead();
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break;
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case 0x01: /* Get keystroke */
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case 0x11: /* Get enhanced keystroke */
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if (!raw_kbd)
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sleep_poll();
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if (KbdEmpty()) {
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R_FLAGS |= PSL_Z;
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break;
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}
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R_FLAGS &= ~PSL_Z;
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R_AX = KbdPeek();
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break;
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case 0x02:
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R_AL = tty_state();
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break;
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case 0x12:
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R_AH = tty_estate();
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R_AL = tty_state();
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break;
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case 0x03: /* Set typematic and delay rate */
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break;
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case 0x05:
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KbdWrite(R_CX);
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break;
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case 0x55:
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R_AX = 0x43af; /* Empirical value ... */
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break;
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case 0x92:
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R_AH = 0x00;
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break;
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case 0xa2:
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debug(D_HALF, "122-key keyboard support check\n");
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break;
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default:
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unknown_int2(0x16, R_AH, REGS);
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break;
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}
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}
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