User`s guide

I/O Address Assignment8.2

The I/O address assignment of the conga-B915 module is functionally identical with a standard PC/AT. The most important addresses and the

ones that differ from the standard PC/AT conguration are listed in the table below.

Table 28 I/O Address Assignment

I/O Address (hex) Size Available Description

0000 - 00FF 256 bytes No Motherboard resources

0100 - 010F 16 bytes No congatec System Control

0170 - 0177 8 bytes No Secondary IDE channel

01F0 - 01F7 8 bytes No Primary IDE channels

0376 1 byte No Secondary IDE channel command port

0377 1 byte No Secondary IDE channel status port

03B0 – 03DF 16 bytes No Video system

03F6 1 byte No Primary IDE channel command port

03F7 1 byte No Primary IDE channel status port

0480 – 04BF 64 bytes No Motherboard resources

04D0 – 04D1 2 bytes No Motherboard resources

0800 – 087F 128 bytes No Motherboard resources

0CF8 - 0CFB 4 bytes No PCI conguration address register

0CFC - 0CFF 4 bytes No PCI conguration data register

0D00 – FFFF See note PCI / PCI Express bus

Note

The BIOS assigns PCI and PCI Express I/O resources from FFF0h downwards. Non PnP/PCI/PCI Express compliant devices must not

consume I/O resources in that area.