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Chapter 3
Signals and Pinout Tables
COM 830
Reference Manual
47
LPC Bus
On the COM 830 the PCI Bus acts as the subtractive decoding agent. All I/O cycles that are not positively
decoded are forwarded to the PCI Bus not the LPC Bus. Only specified I/O ranges are forwarded to the LPC
Bus. In the BIOS the following I/O address ranges are sent to the LPC Bus:
280 – 2FF
3F8 – 3FF
3E8 – 3EF
A00 - A0F
Parts of these ranges are not available if a Super I/O is used on the carrier board. If a Super I/O is not
implemented on the carrier board then these ranges are available for customer use. If you require additional
LPC Bus resources other than those mentioned above, or more information about this subject, contact
Ampro technical support for assistance.
Table 3-26. I/O Address Assignment
I/O Address (hex)
Size
Available
Description
0000 - 00FF
256 bytes
No
Motherboard resources
0100 - 010F
16 bytes
No
Ampro 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 configuration address register
0CFC - 0CFF
4 bytes
No
PCI configuration 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.
Summary of Contents for COM 830
Page 1: ...COM 830 Computer On Module Reference Manual P N 5001829A Revision A ...
Page 10: ...Chapter 1 About This Manual 4 Reference Manual COM 830 ...
Page 90: ...Chapter 4 BIOS Setup Description 84 Reference Manual COM 830 ...
Page 92: ...Appendix A Technical Support 86 Reference Manual COM 830 ...