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Chapter 2
Warning:
During programming, note that each time a port is configured, output ports A
and C are reset to 0, and output port B is undefined.
Programming Mode
Mode 0
Mode 1 Input
Mode 1 Output
Mode 2
* Indicates that the signal is active low.
Cable Assembly Connectors
The cable assembly listed under Optional Equipment in Chapter 1 is an assembly of two 50-pin
cables and three connectors. Both cables are joined to a single connector on one end and to
individual connectors on the free ends. The connector that joins the two cables is a 100-pin
connector that plugs into the I/O connector of the PC-DIO-96. The other two connectors are
50-pin connectors, one of which is connected to pins 1 through 50 of the PC-DIO-96 I/O
connector, and the other of which is connected to pins 51 through 100 of the PC-DIO-96 I/O
connector. The cable with the label on it is connected to pins 1 through 50. Figures 2-5 and 2-6
show the pin assignments for the 50-pin connectors on the cable assembly.
© National Instruments Corporation
Table 2-3. Port C Signal Assignments
Group A
PC7
PC6
PC5
I/O
I/O
I/O
I/O
I/O
IBF A
OBF A *
ACK A *
I/O
OBF A *
ACK A *
IBF A
PC4
PC3
I/O
I/O
STB A *
INTR A
I/O
INTR A
STB A *
INTR A
2-9
Configuration and Installation
Group B
PC2
PC1
PC0
I/O
I/O
I/O
STB B *
IBFB B
INTR B
ACK B *
OBF B *
INTR B
I/O
I/O
I/O
PC-DIO-96 User Manual
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