User`s manual

Appendix C Pin Assignments 71
C.18 Interrupt Assignments
Table C-18: 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 9 Cascaded to INT 0A (IRQ 2)
IRQ 10 Available
IRQ 11 Available
IRQ 12 PS/2 mouse (non-releasable)
IRQ 13 INT from co-processor
IRQ 14 Fixed disk controller
IRQ 15 Not available
IRQ 3 Serial communication port 2
IRQ 4 Serial communication port 1
IRQ 5 Parallel port 2
IRQ 6 Diskette controller (FDC)
IRQ 7 Parallel port 1 (print port)
* PNP audio IRQ select: 5, 7, 9, 10, 11 or 12
* Ethernet function is auto-sensing
C.19 1st MB Memory Map
Table C-19:1st MB memory map
Addr. range (Hex) Device
F000h - FFFFh System ROM
C800h - EFFFh Unused
C000h - C7FFh Expansion ROM
B800h - BFFFh CGA/EGA/VGA text
B000h - B7FFh Unused
A000h - AFFFh EGA/VGA graphics
0000h - 9FFFh Base memory
* D000 - D400H DOC
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2000