INT 1Ah,  0Bh (11)       Set System-Timer Day Counter                some XTs

Sets the number of days since January 1, 1980 for the System-Timer.

On entry:      AH         0Bh
CX         Number of days since January 1, 1980

Returns:       CF         Set if error; else cleared

                                                                          

Notes:         The system timer is the timer set when the system is
started. This date is temporary, lasting only as
long as the system is turned on.

This service is available only for XTs dated 1/10/86
and later. ATs and XT-286s will set the Carry Flag,
thus reporting an error state. Previous machines
will report unpredictable results (including the
state of the Carry Flag).

See also: INT 1Ah, 05h
See also: INT 1Ah, 0Ah

INT 1Ah, 0Bh (11) Set System-Timer Day Counter some XTs