User’s Manual

I/O – Map

Certain I/O addresses are subject to change during boot as PnP managers may relocate devices or functions. The addresses shown in the table are typical locations.

 

 

 

 

 

 

I/O Port

Description

Note

 

 

 

 

 

 

 

0000h-000Fh

Direct memory access controller

 

 

 

0010h-001Fh

Motherboard resources

 

 

 

0020h-0021h

Programmable interrupt controller

 

 

 

0022h-003Fh

Motherboard resources

 

 

 

0040h-0043h

System timer

 

 

 

0044h-005Fh

Motherboard resources

 

 

 

0060h-0060h

Standard 101/102-Key or Microsoft Natural Keyboard

 

 

 

0061h-0061h

System speaker

 

 

 

0062h-0063h

Motherboard resources

 

 

 

0064h-0064h

Standard 101/102-Key or Microsoft Natural Keyboard

 

 

 

 

 

 

 

0065h-006Fh

Motherboard resources

 

 

 

 

 

 

 

0070h-0073h

System CMOS/real time clock

 

 

 

 

 

 

 

 

0074h-007Fh

Motherboard resources

 

 

 

 

 

 

 

 

0080h-0090h

Direct memory access controller

 

 

 

 

 

 

 

 

 

 

 

 

0091h-0093h

Motherboard resources

 

 

 

0094h-009Fh

Direct memory access controller

 

 

 

00A0h-00A1h

Programmable interrupt controller

 

 

 

00A2h-00BFh

Motherboard resources

 

 

 

00C0h-00DFh

Direct memory access controller

 

 

 

00E0h-00EFh

Motherboard resources

 

 

 

00F0h-00FFh

Numeric data processor

 

 

 

0170h-0177h

Secondary IDE controller (dual fifo)

 

 

 

0170h-0177h

VIA Bus Master PCI IDE Controller

 

 

 

01F0h-01F7h

Primary IDE controller (dual fifo)

 

 

 

01F0h-01F7h

VIA Bus Master PCI IDE Controller

 

 

 

02F8h-02FFh

Communications Port (COM2)

 

 

 

 

 

 

 

 

 

 

 

 

0376h-0376h

VIA Bus Master PCI IDE Controller

 

 

 

0376h-0376h

Secondary IDE controller (dual fifo)

 

 

 

 

 

 

 

0378h-037Fh

Printer Port (LPT1)

 

 

 

 

 

 

 

03B0h-03BBh

VIA Tech VT8361/VT8601 Graphics Controller

 

 

 

03C0h-03DFh

VIA Tech VT8361/VT8601 Graphics Controller

 

 

 

03F0h-03F5h

Standard Floppy Disk Controller

 

 

 

03F6h-03F6h

Primary IDE controller (dual fifo)

 

 

 

 

 

 

 

90ECB-862/862L User’s Manual