7-4Physical and Operating Specifications

I/O Address (Hex)

000 - 00F

010 - 01F

020 - 03F

040 - 043

044 - 04F

050 - 052

053 - 05F

060

061

062 - 063

064

065 - 06F

070 - 071

072 - 079

07A - 07F

080 - 08F

090 - 09F

0A0 - 0BF

0C0 - 0DF

0E0 - 0EF

0F0 - 0FF

100 - 15B

15C - 15D

15E - 16F

170 - 177

178 - 1EF

1F0 - 1F7

1F8 - 200

Table 7-4

System I/O

System Function (Shipping Configuration)

DMA Controller # 1

Motherboard

Interrupt controller # 1

Counter/timer registers

Unused

Motherboard

Unused

Keyboard controller

Port B

Unused

Keyboard controller

Unused

NMI Enable/real-time clock

Motherboard

Unused

DMA Page registers

Motherboard

Interrupt controller # 2

DMA Controller # 2

Unused

Co-processor

Unused

Super I/O index/data register

Unused

Fixed disk controller

Unused

Reserved - fixed disk controller

Unused

Continued

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Compaq AP500 manual System I/O, 4Physical and Operating Specifications, Address Hex, System Function Shipping Configuration