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TS-5400 User's Manual
AH = 00 if no error, 86h if no supported by BIOS
Int 15h / Function B020h - Jumper Pin Status
This function returns the status of the option jumpers in register BX according to the list below.
ENTRY:
AX = B020h
EXIT:
CY = 0 (carry flag)
AX = 0
BX = Jumper Pin Status. If Bit X = 1, the jumper is installed.
BX Bit
0
1
2
3
4
5
Table 13 - Int15h/Function B020h register BX
Jumper
Description
JP1
Auto CMOS configuration
JP2
Console Redirected to COM port
(JP6 determines COM port)
JP3
Write Enable flash A:
JP4
Console set to 115K baud
(JP4 off = 9600 baud)
JP5
User definable
JP6
Console switched to COM1
(JP2 must be installed)
return values
32
Technologic Systems
10/31/03
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