Fixed I/O Map - Intel DESKTOP BOARD D955XBK Manual

Intel Desktop Board D955XBK Technical Product Specification

2.3 Fixed I/O Map

Table 11. I/O Map
Address (hex)
0000 - 00FF
0170 - 0177
01F0 - 01F7
(Note 1)
0228 - 022F
(Note 1)
0278 - 027F
(Note 1)
02E8 - 02EF
(Note 1)
02F8 - 02FF
0374 - 0377
0377, bits 6:0
0378 - 037F
03E8 - 03EF
03F0 - 03F5
03F4 – 03F7
03F8 - 03FF
04D0 - 04D1
LPTn + 400
(Note 2)
0CF8 - 0CFB
(Note 3)
0CF9
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.
NOTE
Some additional I/O addresses are not available due to ICH7-R address aliasing. The ICH7-R
data sheet provides more information on address aliasing.
For information about
Obtaining the ICH7-R data sheet
48
Size Description
256 bytes Used by the Desktop Board D955XBK. Refer to the
ICH7-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
7 bits Secondary IDE channel status port
8 bytes LPT1
8 bytes COM3
6 bytes Diskette channel
1 byte 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 Conventional bus configuration address register
1 byte Reset control register
4 bytes PCI Conventional bus 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 on page 15