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Copyright 1991 David Jurgens |
INT 1A,4 - Read Real Time Clock Date (XT 286,AT,PS/2)
AH = 04
on return:
CH = century in BCD (decimal 19 or 20)
CL = year in BCD
DH = month in BCD
DL = day in BCD
CF = 0 if successful
= 1 if error or clock not operating
- calling this interrupt will update the DOS maintained date and
reset the BIOS Data Area date rollover flag at 40:70
- see RTC
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| Esc or Alt-X to exit |
int 1a,4 |
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