INT 1A - TIME - SET ALARM (AT,XT286,PS)
AH = 06h
CH = hour (BCD)
CL = minutes (BCD)
DH = seconds (BCD)
Return: CF set on error (alarm already set or clock stopped for update)
CF clear if successful
Note:   the alarm occurs every 24 hours until turned off, invoking INT 4A each
time
SeeAlso: INT 4A

See also: 1A07

1A06 - TIME - SET ALARM (AT,XT286,PS)