Computer Interrupt Levels (Lpx 560/566); Dma Channel Assignment (All Models) - DEC DECpc LPx Service Maintenance Manual

Digital DECpc LPx/LPx+

Computer Interrupt Levels (LPx 560/566)

Interrupt Number
IRQ1
IRQ3
IRQ4
IRQ6
IRQ7
IRQ12
IRQ13
IRQ14

DMA Channel Assignment (all models)

Channel Controller
0 1
1 1
2 1
3 1
4 2
5 2
6 2
7 2
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Interrupt Source
Keyboard controller
COM2 (if enabled)
COM1 (if enabled)
Diskette drive (if enabled)
LPT1, LPT2, LPT3 (if enabled)
Mouse interrupt
Math co-processor
Hard disk drive (if enabled)
Function
Refresh
Not used
Diskette controller
Not used, (ECP, standard on LPx+)
Cascade DMA
Not used
Not used
Not used
Device Mapping
87