System I/O Address Specifications

 

I/O address (hex)

System Function (shipping configuration)

220

 

- 22F

Entertainment audio

 

 

 

 

230

 

- 26D

Unused

 

 

 

26E

- 26

Unused

 

 

 

 

278

 

- 27F

Unused

 

 

 

 

280

 

- 2AB

Unused

 

 

 

2A0

- 2A7

Unused

 

 

 

2A8

- 2E7

Unused

 

 

 

2E8

- 2EF

Reserved serial port

 

 

2F0 - 2F7

Unused

 

 

2F8 - 2FF

Infrared port

 

 

 

 

300

 

- 31F

Unused

 

 

 

 

320

 

- 36F

Unused

 

 

 

 

370

 

- 377

Secondary diskette drive controller

 

 

 

 

378

 

- 37F

Parallel port (LPT1/default)

 

 

 

 

380

 

- 387

Unused

 

 

 

 

388

 

- 38B

FM synthesizer-OPL3

 

 

38C - 3AF

Unused

 

 

 

3B0

- 3BB

VGA

 

 

3BC - 3BF

Reserved (parallel port/no EPP support)

 

 

3C0 - 3DF

VGA

 

 

 

3E0

- 3E1

ExpressCard controller in CPU

 

 

 

3E2

- 3E3

Unused

 

 

 

3E8

- 3EF

Internal modem

 

 

3F0 - 3F7

"A" diskette controller

 

 

3F8 - 3FF

Serial port (COM1/default)

 

 

CF8 - CFB

PCI configuration index register

 

 

(PCIDIVO-1)

CFC - CFF PCI configuration data register

 

 

 

 

Hardware Specifications and Configurations

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Acer 4253G manual Vga, CF8 CFB, PCIDIVO-1