109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/*
|
|
* BIOS interrupt 1ah handler
|
|
*/
|
|
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <stdlib.h>
|
|
#include "options.h"
|
|
#include "miscemu.h"
|
|
#include "debugtools.h"
|
|
|
|
DEFAULT_DEBUG_CHANNEL(int);
|
|
|
|
#define BCD_TO_BIN(x) ((x&15) + (x>>4)*10)
|
|
#define BIN_TO_BCD(x) ((x%10) + ((x/10)<<4))
|
|
|
|
|
|
/**********************************************************************
|
|
* INT1A_GetTicksSinceMidnight
|
|
*
|
|
* Return number of clock ticks since midnight.
|
|
*/
|
|
DWORD INT1A_GetTicksSinceMidnight(void)
|
|
{
|
|
struct tm *bdtime;
|
|
struct timeval tvs;
|
|
time_t seconds;
|
|
|
|
/* This should give us the (approximately) correct
|
|
* 18.206 clock ticks per second since midnight.
|
|
*/
|
|
gettimeofday( &tvs, NULL );
|
|
seconds = tvs.tv_sec;
|
|
bdtime = localtime( &seconds );
|
|
return (((bdtime->tm_hour * 3600 + bdtime->tm_min * 60 +
|
|
bdtime->tm_sec) * 18206) / 1000) +
|
|
(tvs.tv_usec / 54927);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* INT_Int1aHandler
|
|
*
|
|
* Handler for int 1ah
|
|
* 0x00 - 0x07 - date and time
|
|
* 0x?? - 0x?? - Microsoft Real Time Compression Interface
|
|
*/
|
|
void WINAPI INT_Int1aHandler( CONTEXT86 *context )
|
|
{
|
|
time_t ltime;
|
|
DWORD ticks;
|
|
struct tm *bdtime;
|
|
|
|
switch(AH_reg(context))
|
|
{
|
|
case 0x00:
|
|
ticks = INT1A_GetTicksSinceMidnight();
|
|
CX_reg(context) = HIWORD(ticks);
|
|
DX_reg(context) = LOWORD(ticks);
|
|
AX_reg(context) = 0; /* No midnight rollover */
|
|
TRACE("int1a: AH=00 -- ticks=%ld\n", ticks);
|
|
break;
|
|
|
|
case 0x02:
|
|
ltime = time(NULL);
|
|
bdtime = localtime(<ime);
|
|
|
|
CX_reg(context) = (BIN_TO_BCD(bdtime->tm_hour)<<8) |
|
|
BIN_TO_BCD(bdtime->tm_min);
|
|
DX_reg(context) = (BIN_TO_BCD(bdtime->tm_sec)<<8);
|
|
|
|
case 0x04:
|
|
ltime = time(NULL);
|
|
bdtime = localtime(<ime);
|
|
CX_reg(context) = (BIN_TO_BCD(bdtime->tm_year/100)<<8) |
|
|
BIN_TO_BCD((bdtime->tm_year-1900)%100);
|
|
DX_reg(context) = (BIN_TO_BCD(bdtime->tm_mon)<<8) |
|
|
BIN_TO_BCD(bdtime->tm_mday);
|
|
break;
|
|
|
|
/* setting the time,date or RTC is not allow -EB */
|
|
case 0x01:
|
|
/* set system time */
|
|
case 0x03:
|
|
/* set RTC time */
|
|
case 0x05:
|
|
/* set RTC date */
|
|
case 0x06:
|
|
/* set ALARM */
|
|
case 0x07:
|
|
/* cancel ALARM */
|
|
break;
|
|
|
|
case 0xb0: /* Microsoft Real Time Compression */
|
|
switch AL_reg(context)
|
|
{
|
|
case 0x01:
|
|
/* not present */
|
|
break;
|
|
default:
|
|
INT_BARF(context, 0x1a);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
INT_BARF( context, 0x1a );
|
|
}
|
|
}
|