EISA Host Adapters

The Digi EISA EPC/X host adapter has 1 megabyte of on-board dual-ported RAM which is accessed through a 32K “window”, which can be mapped into any 32K region in the computer’s memory address space up to the 4 gigabyte limit. The EISA EPC/X configuration file provides sixteen address ranges below 1 megabyte, and sixteen address ranges in the fourth gigabyte:

Below 1 Megabyte:*

 

 

80000h

88000h

90000h

98000h

A0000h

A8000h

B0000h

B8000h

C0000h

C8000h

D0000h

D8000h

E0000h

E8000h

F0000h

F8000h

Above 1 Megabyte:

 

 

F0000000h

F1000000h

F2000000h

F3000000h

F4000000h

F5000000h

F6000000h

F7000000h

F8000000h

F9000000h

FA000000h

FB000000h

FC000000h

FD000000h

FE000000h

FF000000h

*When addressed below 1 megabyte, the same constraints apply as for the ISA host adapter (see page 87).

88

T1 Modem Bank

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Image 98
Digi 90031300 manual Eisa Host Adapters