National Instruments Low-Cost Multifunction I/O Board for ISA..., User Manual

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Register Map and Descriptions Appendix D
Lab-PC+ User Manual D-36 © National Instruments Corporation
Port C Register
Port C is special in the sense that it can be used as an 8-bit I/O port like Port A and Port B if
neither Port A nor Port B is used in handshaking (latched) mode. If either Port A or Port B is
configured for latched I/O, some of the bits in Port C are used for handshaking signals. See
Programming the Digital I/O Circuitry in Appendix E, Register-Level Programming, for a
description of the individual bits in the Port C Register.
Address: Base a 12 (hex)
Type: Read-and-write
Word Size: 8-bit
Bit Map:
7 6 5 4 3 2 1 0
D7 D6 D5 D4 D3 D2 D1 D0
Bit Name Description
7-0 D<7..0> 8-bit Port C data.