3Com 3C319 manual BIOS/MMIO Address Location, Shared RAM Page Size and Address Range

Configuration Options 5-9

If a system resource conflict continues, you may have to change the settings of other NICs or options that are in your PC.

BIOS/MMIO Address Location

There are 12 possible 8 KB blocks of PC memory that can be assigned for accessing the ROM area of the 3C319 NIC. The factory default ROM address for the 3C319 NIC is CC000–CDFFF. The ROM address locations are as follows, with the default in bold:

C8000-C9FFFD4000–D5FFF

CA000–CBFFFD6000–D7FFF

CC000–CDFFFD8000–D9FFF

CE000–CFFFFDA000–DBFFF

D0000–D1FFFDC000–DDFFF

D2000–D3FFFDE000–DFFFF

The BIOS/MMIO address selected must not be assigned for use by any other NIC or device and cannot be the same as the RAM address for this NIC. If a system resource conflict exists, you may have to change the settings of other NICs or devices that are in your PC.

Shared RAM Page Size and Address Range

There are 22 possible blocks of memory available for accessing the RAM located on the 3C319 NIC. The factory default RAM size and address location for the 3C319 NIC, which support RAM paging, are 16 KB / D8000–DBFFF.

RAM paging allows the software to access all 64 KB of RAM on the 3C319 NIC one page (16 KB) at a time, while using only 16 KB of PC memory space. RAM paging is available for all 16 KB address ranges.