BIOS Support
7-13
7
Controlling the LEDs
This will Turn Off or On LEDs.
Entry:
AX = 5380h
BH = 01h
BL =
Data Bits 7 - 2 are reserved and should be set to 0
DB 1
DB 0
LED State
0
0
OFF
0
1
Green
1
0
Red
1
1
Red & Green
together
Exit:
CF = 0 success
Very Low Battery
When a very low battery occurs, the TRAKKER T2090 attempts to go into the
SUSPEND state. If the application is writing to the clock or writing to the
display, the unit cannot enter the SUSPEND state. This procedure will repeat
every second until the SUSPEND mode can be reached. The unit will not exit
suspend until the voltage reading for the battery is valid. If the unit is in the
OFF state and the boot command is attempted, a check of the battery status is
made and if the Very Low Battery state is detected the unit will enter the OFF
state rather than continue with the boot process.
System Initialization
This section gives an overview of the mechanisms used to bring the T2090 up to
a DOS prompt.
Upon completion of the initial BIOS boot, the BIOS will search the real memory
area of C000:0 to F000:0 for valid BIOS extensions. Two such extensions reside
in this memory area, the CardTrick (FlashDisk) driver and the loader for
ROMDOS. The first will cause the FlashDisk driver to be installed, the second
will install INT19h for boot to DOS.
Summary of Contents for Trakker T2090
Page 1: ...TRAKKER T2090Batch Hand HeldComputer P N 067212 003 User s Manual ...
Page 4: ......
Page 14: ......
Page 19: ...Getting Started 1 ...
Page 20: ......
Page 33: ...User Interface 2 ...
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Page 55: ...Application Development 3 ...
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Page 61: ...Application Functions 4 ...
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Page 127: ...Reader Command Reference 5 ...
Page 128: ......
Page 145: ...Configuration Command Reference 6 ...
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Page 187: ...BIOS Support 7 ...
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Page 205: ...Hardware Specifications 8 ...
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Page 212: ......
Page 213: ...Demo Software A ...
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Page 231: ...Microsoft Visual C C Settings B ...
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Page 237: ...Full ASCII Charts C ...
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