Appendix C
Hardware and Software Configuration
© National Instruments Corp.
C-17
GPIB-PCII/IIA for Graphics
Table C-4. Interrupt Lines Used by Other Devices (Continued)
IRQ
Device
4
Serial Port 1
BSC
BSC Alt.
SDLC
3
Serial Port 2
BSC
BSC Alt.
Cluster (Primary)
PC Network (default)
PC Network Alt. (default)
SDLC
WD Eth (default)
3Com EtherLink (default)
2
IRQ Chain for PC AT
1
Keyboard Controller Output Buffer Full
0
Timer Channel 0 Output
DMA Channel Selection
The GPIB-PCII/IIA can use DMA channels 1, 2, or 3, or no DMA at all. The
DMA channel is selected by the jumper sets labeled DRQ1 through DACK 3
(see Figure C-1).
Each DMA channel consists of two signal lines, as shown in Table C-5.