National Instruments Low-Cost Multifunction I/O Board for ISA Lab-PC+ - Manual (Page 153)

Appendix D Register Map and Descriptions
© National Instruments Corporation D-37 Lab-PC+ User Manual
Digital Control Register
The Digital Control Register can be used to configure Port A, Port B, and Port C as inputs or
outputs as well as selecting simple mode (basic I/O) or handshaking mode (strobed I/O) for
transfers. See Programming the Digital I/O Circuitry in Appendix E, Register-Level
Programming, for a description of the individual bits in the Digital Control Register.
Address: Base address + 13 (hex)
Type: Write-only
Word Size: 8-bit
Bit Map:
7 6 5 4 3 2 1 0
CW7 CW6 CW5 CW4 CW3 CW2 CW1 CW0
Bit Name Description
7-0 CW<7..0> 8-bit control word.