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Table 8-4 system i/o – Compaq DESKPRO 1000 User Manual

Page 83

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Compaq Deskpro 1000 Series of Personal Computers

8-3

Table 8-4

System I/O

I/O Address (Hex) *

System Function (Shipping Configuration)

000 - 00F

8237 DMA Controller #1

020 - 02F

8259A Master Programmable Interrupt Controller

040 - 05F

Programmable Internal Timer

060 - 06F

Keyboard Controller

070 - 071

System CMOS/RTC, also NMI Enable/Disable

080

Manufacture System Check Point Port

081 - 09F

DMA Page Registers

0A0 - 0BF

Second 8259 Programmable Interrupt Controller

0C0 - 0DF

DMA Controller #2

0F0 - 0FF

Numeric Data Processor

170 – 17F

Secondary IDE Controller

1F0 - 1FF

Primary IDE Controller

200

Gameport (only if you have a sound card installed)

201

Gameport (only if you have a sound card installed)

278 - 27F

Third Parallel Port

2E8 - 2EF

COM4 (if you set COM4)

2F8 - 2FF

COM2

370 - 377

Secondary Diskette Controller (if present))

378 - 37F

Second Parallel Port

3B0 - 3BF

Monochrome Display Adapter/Primary Parallel Port

3C0 - 3CF

EGA/VGA Adapter

3D0 - 3DF

Color Graphic Adapter

3E8 - 3EF

COM3 (if you set COM3)

3F0 - 3F7

Primary Diskette Controller

3F8 - 3FF

COM1

04D0 - 04D1

PIC Edge/Level Control Register

0CF8 - 0CFF

PCI Configuration Register

6000 - FFFF

PCI Device I/O Space

*All I/O addresses below 100 are reserved by the chipset even if they are not used.