Fixed I/O Map; I/O Map - Intel BOXD875PBZLK Technical Product Specification

Intel Desktop Board D875PBZ Technical Product Specification

2.4 Fixed I/O Map

Table 14.

I/O Map

Address (hex)
0000 - 00FF
0170 - 0177
01F0 - 01F7
0228 - 022F (Note 1)
0278 - 027F (Note 1)
02E8 - 02EF (Note 1)
02F8 - 02FF (Note 1)
0374 – 0377
0378 - 037F
03B0 - 03BB
03C0 - 03DF
03E8 - 03EF
03F0 - 03F5
03F4 – 03F7
03F8 - 03FF
04D0 - 04D1
LPTn + 400
0CF8 - 0CFB (Note 2)
0CF9 (Note 3)
0CFC - 0CFF
FFA0 - FFA7
FFA8 - FFAF
Notes:
1. Default, but can be changed to another address range
2. Dword access only
3. Byte access only
For information about
ICH5-R addressing
52
Size Description
256 bytes Used by the Desktop Board D875PBZ. Refer to the ICH5-
R data sheet for dynamic addressing information
8 bytes Secondary Parallel ATA IDE channel command block
8 bytes Primary Parallel ATA IDE channel command block
8 bytes LPT3
8 bytes LPT2
8 bytes COM4
8 bytes COM2
4 bytes Secondary Parallel ATA IDE channel control block
8 bytes LPT1
12 bytes Intel 82875P MCH
32 bytes Intel 82875P MCH
8 bytes COM3
6 bytes Diskette channel
4 bytes Primary Parallel ATA IDE channel control block
8 bytes COM1
2 bytes Edge/level triggered PIC
8 bytes ECP port, LPTn base address + 400h
4 bytes PCI configuration address register
1 byte Reset control register
4 bytes PCI configuration data register
8 bytes Primary Parallel ATA IDE bus master registers
8 bytes Secondary Parallel ATA IDE bus master registers
Refer to
Section 1.2, page 16