B.1 System I/O ports

Table B-1: System I/O ports

Addr. range

 

(Hex)

Device

 

 

000-01F

DMA controller

 

 

020-021

Interrupt controller 1, master

022-023

Chipset address

 

 

040-05F

8254 timer

 

 

060-06F

8042 (keyboard controller)

 

 

070-07F

Real-time clock, non-maskable interrupt (NMI) mask

080-09F

DMA page register,

 

 

0A0-0BF

Interrupt controller 2

 

 

0C0-0DF

DMA controller

 

 

0F0

Clear math co-processor

 

 

0F1

Reset math co-processor

 

 

0F8-0FF

Math co-processor

 

 

170- 178

2nd fixed disk for CompactFlash

1F0-1F8

1st fixed disk

 

 

200-207

Game I/O

 

 

278-27F

Reserved

 

 

2F8-2FF

Serial port 2

300-31F

Ethernet**

 

 

360-36F

Reserved

 

 

378-37F

Parallel printer port 1 (LPT2)

 

 

380-38F

SDLC, bisynchronous 2

3A0-3AF

Bisynchronous 1

 

 

3B0-3BF

Monochrome display and printer adapter (LPT1)

 

 

3C0-3CF

Reserved

 

 

3D0-3DF

Color/graphics monitor adapter

 

 

3F0-3F7

Diskette controller

 

 

3F8-3FF

Serial port 1

 

 

443

Watchdog timer

*PNP audio I/O map range from 220 ~ 250H (16 bytes) MPU-401 select from 300 ~ 330H (2 bytes)

**default setting

96 PCM-5820 Series User's Manual

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AMD PCM-5820 manual System I/O ports, Addr. range Hex Device