/*
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. All rights reserved.
*
* 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 Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``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 Berkeley Software Design, Inc. 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.
*
* BSDI int1a.c,v 2.2 1996/04/08 19:32:49 bostic Exp
*
* $FreeBSD$
*/
#include "doscmd.h"
static inline int
to_BCD (int n)
{
n &= 0xFF;
return n%10 + ((n/10)<<4);
}
void
int1a(regcontext_t *REGS)
{
struct timeval tod;
struct timezone zone;
struct tm *tm;
time_t tv_sec;
long value;
static long midnight = 0;
R_FLAGS &= ~PSL_C;
switch (R_AH) {
case 0x00:
gettimeofday(&tod, &zone);
if (midnight == 0) {
tv_sec = boot_time.tv_sec;
tm = localtime(&tv_sec);
midnight = boot_time.tv_sec - (((tm->tm_hour * 60)
+ tm->tm_min) * 60
+ tm->tm_sec);
}
R_AL = (tod.tv_sec - midnight) / (24 * 60 * 60);
if (R_AL) {
tv_sec = boot_time.tv_sec;
tm = localtime(&tv_sec);
midnight = boot_time.tv_sec - (((tm->tm_hour * 60)
+ tm->tm_min) * 60
+ tm->tm_sec);
}
tod.tv_sec -= midnight;
tod.tv_usec -= boot_time.tv_usec;
value = (tod.tv_sec * 182 + tod.tv_usec / (1000000L/182)) / 10;
R_CX = value >> 16;
R_DX = value & 0xffff;
break;
case 0x01: /* set current clock count */
tv_sec = boot_time.tv_sec;
tm = localtime(&tv_sec);
midnight = boot_time.tv_sec - (((tm->tm_hour * 60)
+ tm->tm_min) * 60 + tm->tm_sec);
break;
case 0x02:
gettimeofday(&tod, &zone);
tv_sec = tod.tv_sec;
tm = localtime(&tv_sec);
R_CH = to_BCD(tm->tm_hour);
R_CL = to_BCD(tm->tm_min);
R_DH = to_BCD(tm->tm_sec);
break;
case 0x04:
gettimeofday(&tod, &zone);
tv_sec = tod.tv_sec;
tm = localtime(&tv_sec);
R_CH = to_BCD((tm->tm_year + 1900) / 100);
R_CL = to_BCD((tm->tm_year + 1900) % 100);
R_DH = to_BCD(tm->tm_mon + 1);
R_DL = to_BCD(tm->tm_mday);
break;
default:
unknown_int2(0x1a, R_AH, REGS);
break;
}
}
