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A.14 System I/O ports
System I/O ports
Addr. range (Hex)Device
000-01F
020-021
022-023
040-05F
060-06F
070-07F
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
* PNP audio I/O map range from 220 ~ 250H (16 bytes)
MPU-401 select from 300 ~ 330H (2 bytes)
DMA controller
Interrupt controller 1, master
Chipset address
8254 timer
8042 (keyboard Controller)
Real-time clock, non-maskable interrupt (NMI)
mask
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(LPT1)
Reserved
Color/graphics monitor adapter
Diskette controller
Serial port 1
Appendix A Pin Assignments
67
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