Intermec m90 Reference Guide
DOS System Call
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Chapter 4
49
M90 Series Portable Data Entry Unit Reference Manual
(continued)
0B
Keyhit Check
Entry Parameter: AH=0B
Return Value:
Return Value:
AL=0
If character is not ready
AL=FF If character is ready
1A
LCD Backlight ON/OFF Control
Entry Parameter: AH=0x1A
BH=0
AL=0
AL=0
Set LCD backlight OFF
AL=1–5
Set LCD backlight ON for 5 seconds
AL=6–59
Set LCD backlight ON for 6–59 seconds
AL=60–0xFF Set LCD backlight ON for 59 seconds
Return Value:
None
1A
Buzzer ON/OFF Control
Entry Parameter: AH=0x1A
BH=1
AL=0
AL=0
Set Buzzer OFF
AL=1
Set Buzzer ON
Return Value:
None
1A
Key Enable/Disable Setting
Entry Parameter: AH=0x1A
BH=2
AL=0
AL=0
All keys except ON, OFF, four function keys
AL=1
Supervisor mode key
AL=2
Cold start key
AL=3
Warm start key
AL=4
User menu key
BL=5
Start menu key
BL=0
Disable
BL=1
Enable
Return Value:
None
1A
Beeper Volume
Entry Parameter: AH=0x1A
BH=3
AL=0
AL=0
Set low beeper volume
AL=1
Set middle beeper volume
AL=2
Set high beeper volume
Return Value:
None
1A
Battery Check
Entry Parameter: AH=0x1A
BH=8
Return Value:
AL=0
Main battery normal
AL=1
Main battery low
AH=0
Backup battery normal
AH=1
Backup battery low