Compaq PC CARD ADAPTER Configuration Options, Ring Speed, Base Address, Mmio Address Location

B-2 APPENDIX B: SPECIFICATIONS

Configuration Options

This section describes the configuration options for the

3C689 adapter. The following options are available:

■Ring Speed

■I/O Base Address

■MMIO Address Location

■Shared RAM Page Size and Address Range

■Interrupt Request Level

These options are described on the following pages.

Ring Speed

The 3C689 adapter operates at either 4 or 16 Mbps ring speed and must match the speed of the token ring network. The default is 16 Mbps.

I/O Base Address

The I/O base addresses allowed are Primary or Secondary. The Primary default address is A20h. If a system resource conflict continues, you may have to change the settings of other adapters or options that are in your computer.

MMIO Address Location

There are 16 possible 8 KB blocks of PC memory that can be assigned for accessing the MMIO address area of the 3C689 adapter. The factory default MMIO address is CC000. The 16 MMIO address locations are listed below, with the defaults in bold.

C0000–C1FFFD0000–D1FFF

C2000–C3FFFD2000–D3FFF

C4000–C5FFFD4000–D5FFF

C6000–C7FFFD6000–D7FFF

C8000–C9FFFD8000–D9FFF

CA000–CBFFFDA000–DBFFF

CC000–CDFFF DC000–DDFFF

CE000–CFFFFDE000–DFFFF