Ampro Corporation COM 830 - Manual (Page 53)

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.