AH=2BH - 8086 INT 21H

AH = 2Bh - SET SYSTEM DATE
Entry: CX = year (1980-2099) DH = month DL = day
Return:
AL = 00 successful
FFh invalid date, system date unchanged
Note: DOS 3.3+ also sets CMOS clock
 

Syntax

MOV AH,2BH
INT 21H

Example

.data
	date db 04h
	month db 05h
	year dw 2011h
.code
	...
	...
	mov cx,year
	mov dh,month
	mov dl,date
	mov ah,2bh
	int 21h
	...
	...
	end

Output / Return Value

Return:
    AL = 00 successful
    FFh invalid date, system date unchanged
Note: DOS 3.3+ also sets CMOS clock

Limitations

Alternatives / See Also

Reference