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.
