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Table C.9: System I/O ports
Addr. range (Hex) Device
000-01F
020-021
022-023
040-05F
043
060-06F
070-07F
mask
080-09F
0A0-0BF
0C0-0DF
0F0
0F1
0F8-0FF
1F0-1F8
200-207
278-27F
2F8-2FF
300-31F
360-36F
378-37F
380-38F
3A0-3AF
3B0-3BF
3C0-3CF
3D0-3DF
3F0-3F7
3F8-3FF
443
DMA controller
Interrupt controller 1, master
Chipset address
8254 timer
Watchdog timer disable
8042 (keyboard Controller)
Real-time clock, non-maskable interrupt (NMI)
DMA page register,
Interrupt controller 2
DMA controller
Clear math co-processor
Reset math co-processor
Math co-processor
Fixed disk
Game I/O
Parallel printer port 2 (LPT 3)
Serial port 2
Prototype card
Reserved
Parallel printer port 1 (LPT 2)
SDLC, bisynchronous 2
Bisynchronous 1
Monochrome display and printer adapter (LPT 1)
Reserved
Color/graphics monitor adapter
Diskette controller
Serial port 1
Watchdog timer enable and trigger
65
Appendix C
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