Intel D945PLRN User Manual

Intel Desktop Board D945PLRN Technical Product Specification
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2.2 Fixed I/O Map
Table 10. I/O Map
Address (hex) Size Description
0000 - 00FF 256 bytes Used by the Desktop Board D945PLRN. Refer to the ICH7
data sheet for dynamic addressing information.
0170 - 0177 8 bytes Secondary Parallel ATA IDE channel command block
01F0 - 01F7 8 bytes Primary Parallel ATA IDE channel command block
0228 - 022F
(Note 1)
8 bytes LPT3
0278 - 027F
(Note 1)
8 bytes LPT2
02E8 - 02EF
(Note 1)
8 bytes COM4
02F8 - 02FF
(Note 1)
8 bytes COM2
0374 - 0377 4 bytes Secondary Parallel ATA IDE channel control block
0377, bits 6:0 7 bits Secondary IDE channel status port
0378 - 037F 8 bytes LPT1
03E8 - 03EF 8 bytes COM3
03F0 - 03F5 6 bytes Diskette channel
03F4 – 03F7 1 byte Primary Parallel ATA IDE channel control block
03F8 - 03FF 8 bytes COM1
04D0 - 04D1 2 bytes Edge/level triggered PIC
LPTn + 400 8 bytes ECP port, LPTn base address + 400h
0CF8 - 0CFB
(Note 2)
4 bytes PCI Conventional bus configuration address register
0CF9
(Note 3)
1 byte Reset control register
0CFC - 0CFF 4 bytes PCI Conventional bus configuration data register
FFA0 - FFA7 8 bytes Primary Parallel ATA IDE bus master registers
FFA8 - FFAF 8 bytes Secondary Parallel ATA IDE bus master registers
Notes:
1. Default, but can be changed to another address range
2. Dword access only
3. Byte access only
 NOTE
Some additional I/O addresses are not available due to ICH7 address aliasing. The ICH7 data
sheet provides more information on address aliasing.
For information about Refer to
Obtaining the ICH7 data sheet Section 1.2, page 15

Intel D945PLRN Specifications

General

Brand	Intel
Model	D945PLRN
Category	Motherboard
Language	English