Intermec 6200 Reference Guide

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SECTION 6
Conversions and Interfaces
PEN*KEY
R
 6200/6300 Hand-Held Computer Programmer’s Reference Guide    6-117
INT 1Ah, Function AH = 09h:  Read the Real-Time Clock Alarm
BIOS
Reads the alarm hour, alarm minute, and alarm second data and the AIE bit in
Register B from the CMOS RAM area of the MC 146818.  This function must
wait for the updateĆinĆprogress bit to become zero and disable interrupts before
accessing the CMOS data.
On Entry:
AH = 09h
On Return:
If successful:
Carry = 0 
CH = Hours in BCD (0ć23)
CL = Minutes in BCD (0ć59)
DH = Seconds in BCD (0ć59)
DL = 1 (Alarm enabled)
If NOT successful:
Carry = 0 
DL = 0 (Alarm NOT enabled)
NPOWER Interfaces: INT 2Fh
These are NPOWER.EXEĆsupported interrupts.
INT 2Fh, Function AX = 5400h:  Install Check
NPOWER
On Entry:
AH = 54h
AL = 00h
On Return:
AH = APM driver major version (BCD)
AL = APM driver minor version (BCD)
BX = 504Dh if NPOWER installed
Carry = 0  (Cleared)
6. Conversions and
Interfaces