BCD_INT PcGetTime

TIMEINFO* PcGetTime ( VOID  ) Definition at line 25 of file pcrtc.c. Referenced by PcMachInit(). { static TIMEINFO TimeInfo; REGS Regs; for (;;) { /* Some BIOSes, such as the 1998/07/25 system ROM * in the Compaq Deskpro EP/SB, leave CF unchanged * if successful, so CF should be cleared before * calling this function. */ Regs.x.eflags = 0; // __writeeflags(__readeflags() & ~EFLAGS_CF); /* Int 1Ah AH=04h * TIME - GET REAL-TIME CLOCK DATE (AT,XT286,PS) * * AH = 04h * CF clear to avoid bug * Return: * CF clear if successful * CH = century (BCD) * CL = year (BCD) * DH = month (BCD) * DL = day (BCD) * CF set on error */ Regs.b.ah = 0x04; Int386(0x1A, &Regs, &Regs); if (!INT386_SUCCESS(Regs)) continue; TimeInfo.Year = 100 * BCD_INT(Regs.b.ch) + BCD_INT(Regs.b.cl); TimeInfo.Month = BCD_INT(Regs.b.dh); TimeInfo.Day = BCD_INT(Regs.b.dl); /* Some BIOSes leave CF unchanged if successful, * so CF should be cleared before calling this function. */ Regs.x.eflags = 0; // __writeeflags(__readeflags() & ~EFLAGS_CF); /* Int 1Ah AH=02h * TIME - GET REAL-TIME CLOCK TIME (AT,XT286,PS) * * AH = 02h * CF clear to avoid bug * Return: * CF clear if successful * CH = hour (BCD) * CL = minutes (BCD) * DH = seconds (BCD) * DL = daylight savings flag (00h standard time, 01h daylight time) * CF set on error (i.e. clock not running or in middle of update) */ Regs.b.ah = 0x02; Int386(0x1A, &Regs, &Regs); if (!INT386_SUCCESS(Regs)) continue; TimeInfo.Hour = BCD_INT(Regs.b.ch); TimeInfo.Minute = BCD_INT(Regs.b.cl); TimeInfo.Second = BCD_INT(Regs.b.dh); break; } return &TimeInfo; }