Intel D845EPI Intel Desktop Board D845EPI Technical Product Specification - Page 38
Fixed I/O Map
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Intel Desktop Board D845EPI Technical Product Specification 2.3 Fixed I/O Map Table 12. I/O Map Address (hex) 0000 - 00FF Size 256 bytes Description Used by the Desktop Board D845EPI. Refer to the ICH4 data sheet for dynamic addressing information. 0170 - 0177 01F0 - 01F7 0228 - 022F (Note 1) 0278 - 027F (Note 1) 02E8 - 02EF (Note 1) 02F8 - 02FF (Note 1) 0376 0377, bits 6:0 8 bytes 8 bytes 8 bytes 8 bytes 8 bytes 8 bytes 1 byte 7 bits Secondary IDE channel Primary IDE channel LPT3 LPT2 COM4 COM2 Secondary IDE channel command port Secondary IDE channel status port 0378 - 037F 03B0 - 03BB 03C0 - 03DF 03E8 - 03EF 03F0 - 03F5 03F6 03F8 - 03FF 04D0 - 04D1 LPTn + 400 0CF8 - 0CFB (Note 2) 0CF9 (Note 3) 0CFC - 0CFF FFA0 - FFA7 8 bytes 12 bytes 32 bytes 8 bytes 6 bytes 1 byte 8 bytes 2 bytes 8 bytes 4 bytes 1 byte 4 bytes 8 bytes LPT1 Intel 82845E MCH Intel 82845E MCH COM3 Diskette channel 1 Primary IDE channel command port COM1 Edge/level triggered PIC ECP port, LPTn base address + 400h PCI configuration address register Turbo and reset control register PCI configuration data register Primary bus master IDE registers FFA8 - FFAF 8 bytes Secondary bus master IDE 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 ICH4 address aliasing. The ICH4 data sheet provides more information on address aliasing. For information about Obtaining the ICH4 data sheet Refer to Section 1.3 on page 16 38