User`s manual

Appendix A System Assignments 71
A.2 DMA channel assignments
Table A-2: DMA channel assignments
Channel Function
0 Available
1 Available
2 Floppy disk (8-bit transfer)
3 Available
4 Cascade for DMA controller 1
5 Available
6 Available
7 Available
A.3 Interrupt assignments
Table A-3: Interrupt assignments
Interrupt# Interrupt source
IRQ 0 interval timer
IRQ 1 Keyboard
IRQ 2 Interrupt from controller 2 (cascade)
IRQ 8 Real-time clock
IRQ 12 PS/2 mouse (non-releasable)
IRQ 13 INT from co-processor
IRQ 14 Fixed disk controller (Primary)
IRQ 15 Fixed disk controller (Secondary)
IRQ 3 Serial communication port 2
IRQ 4 Serial communication port 1
IRQ 6 Diskette controller (FDC)
IRQ 7 Parallel port 1 (printer port)
Note: The Ethernet function is auto-sensing.