90c38ed200
a group of dos emulator developers. Submitted by: Jonathan Lemon <jlemon@americantv.com> Obtained from: BSDI
111 lines
3.2 KiB
C
111 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 int1a.c,v 2.2 1996/04/08 19:32:49 bostic Exp
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*
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* $Id: int1a.c,v 1.3 1996/09/22 15:42:56 miff Exp $
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*/
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#include "doscmd.h"
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static inline int
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to_BCD (int n)
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{
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n &= 0xFF;
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return n%10 + ((n/10)<<4);
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}
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void
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int1a(regcontext_t *REGS)
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{
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struct timeval tod;
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struct timezone zone;
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struct tm *tm;
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long value;
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static long midnight = 0;
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R_FLAGS &= ~PSL_C;
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switch (R_AH) {
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case 0x00:
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gettimeofday(&tod, &zone);
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if (midnight == 0) {
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tm = localtime(&boot_time.tv_sec);
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midnight = boot_time.tv_sec - (((tm->tm_hour * 60)
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+ tm->tm_min) * 60
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+ tm->tm_sec);
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}
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R_AL = (tod.tv_sec - midnight) / (24 * 60 * 60);
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if (R_AL) {
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tm = localtime(&boot_time.tv_sec);
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midnight = boot_time.tv_sec - (((tm->tm_hour * 60)
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+ tm->tm_min) * 60
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+ tm->tm_sec);
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}
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tod.tv_sec -= midnight;
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tod.tv_usec -= boot_time.tv_usec;
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value = (tod.tv_sec * 182 + tod.tv_usec / (1000000L/182)) / 10;
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R_CX = value >> 16;
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R_DX = value & 0xffff;
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break;
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case 0x01: /* set current clock count */
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tm = localtime(&boot_time.tv_sec);
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midnight = boot_time.tv_sec - (((tm->tm_hour * 60)
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+ tm->tm_min) * 60 + tm->tm_sec);
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break;
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case 0x02:
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gettimeofday(&tod, &zone);
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tm = localtime(&tod.tv_sec);
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R_CH = to_BCD(tm->tm_hour);
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R_CL = to_BCD(tm->tm_min);
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R_DH = to_BCD(tm->tm_sec);
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break;
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case 0x04:
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gettimeofday(&tod, &zone);
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tm = localtime(&tod.tv_sec);
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R_CH = to_BCD((tm->tm_year + 1900) / 100);
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R_CL = to_BCD((tm->tm_year + 1900) % 100);
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R_DH = to_BCD(tm->tm_mon + 1);
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R_DL = to_BCD(tm->tm_mday);
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break;
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default:
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unknown_int2(0x1a, R_AH, REGS);
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break;
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}
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}
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