IEI Technology WAFER-LX, User Manual

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WAFER-LX User Manual
7 DIO_IN2 8 DIO_OUT2
9 DIO_IN3 10 DIO_OUT3
Table 2-15 Digital Input/Output Definition Options
I/O Address
DESCRIPTION
6F08
Reads DIO port data, and returns AL DIO input data. The boot-up
default input correspondence is DIO –DI3 => Bit0 – Bit3.
Configuration example:
MOV AX, 6F08h
INT 15h
When executed, the AL contents include DIO input data.
Masking required on user applications for those non-input bits.
6F09 Outputs data to DIO port. The BL contents include output data.
The boot-up default correspondence is DO0 – DO3 => Bit4 – Bit7.
Configuration example:
MOV AX, 6F09h
MOV BL, 19h
INT 15h
If set as the boot-up default, DO0 =1, DO1 – DO3 = 0
6F0A
Defines DIO port (8 bits) as input or output. Each of 8 bits in the
BL register represents one DIO signal.
If set to “1,” the DIO becomes input signal.
If set to “0,” the DIO port carries output signal.
If the boot-up default is set to 0Fh, with 4 inputs and 4 outputs.
Configuration example:
Move AX, 6F0Ah
MOV BL, 00h
INT 15h
When executed, 8 DIO signals become output signals.
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