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B.2 DMA channel assignments
CHANNEL FUNCTION
0 Available
1 Available
2
Floppy disk (8-bit transfer)
3 Parallel**
4
Cascade for DMA controller 1
5 Available
6 Available
7 Available
** parallel port DMA default setting: DMA 3
parallel port DMA select: DMA 1.3
B.3 Interrupt assignments
INTERRUPT #
INTERRUPT SOURCE
NMI
Parity error detected
IRQ 0
System timer
IRQ 1
Keyboard
IRQ 2
Interrupt from controller 2 (cascade)
IRQ 8
Real-time clock
IRQ 9
LAN Realtak8100
IRQ 10
Serial communication port 4
IRQ 11
Serial communication port 3
IRQ 12
PS/2 mouse
IRQ 13
Numeric data processor
IRQ 14
CX5530 Primary IDE controller
IRQ 15
CX5530 Second IDE controller
IRQ 3
Serial communication port 2
IRQ 4
Serial communication port 1
IRQ 5
IRQ 6
Diskette controller (FDC)
IRQ 7
Parallel port 1 (print port)
* Ethernet IRQ is automatic set by the system
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Summary of Contents for ROCKY-512
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