| /* |
| * 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 ); |
| } |
| } |