Specifications

AMD Geode™ GeodeROM Functional Specification 99
System Time and Date
32087C
11.1.9 Function 09h - Get Real-Time Clock Alarm Status
Description:
Sets the alarm in the system’s real-time clock. The alarm occurs every 24 hours, causing an INT 4Ah, until it is dis-
abled.
Passed:
Returns:
Related Functions:
None.
11.1.10 Function 0Ah - Read System Day Counter
Description:
Returns the number of days since January 1, 1980, from the value stored in the BDA (40:CE).
Passed:
Returns:
Related Functions:
INT 1Ah "Function 04h - Get Real-Time Clock Date Status" on page 97.
11.1.11 Function 0Bh - Set System Day Counter
Description:
Returns the number of days since January 1, 1980, from the value stored in the BDA (40:CE).
Passed:
Parameter Description
AH 09h
Parameter Description
CH The hour for the alarm time, in BCD
CL The minutes for the alarm time, in BCD
DH The seconds for the alarm time, in BCD
DL Alarm status:
00h = Alarm not enabled
01h = Alarm enabled, but will not power-up system
02h = Alarm will power-up system
Parameter Description
AH 0Ah
Parameter Description
CX Number of days since 1/1/1980
Parameter Description
AH 0Bh
CX Number of days since 1/1/1980