General Module Setup; Window Address Selection - Xycom XVME-976 Manual

Adapter module

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General Module Setup

This section describes how to configure the following:

Window Address

System Power Fail Interrupt

Control Register Address

Board Number

The jumper tables use the convention "/" to mean the two pins shorted. This

means that "3/4", (pins 3 and 4), of the jumper array are connected with a

shorting block.

The expansion memory appears in a 64K window at address D0000H or

E0000H. The XVME PC/AT CPUs use the E0000H block for VMEbus

Real Mode Window accesses. If code on the memory expansion module will

require use of the VMEbus Real Mode Window, the memory expansion

module must reside at D0000H. The expansion module requires the use of

the entire D0000H segment of 64 Kbytes. If another PC/AT device resides

anywhere within this 64K block, e.g. at D0000H, contention will occur if

W11 7/8 is open. If W11 7/8 is shorted, selecting E0000H, the code on the

memory expansion module, cannot access the VMEbus through the Real

Mode Window. This is because the Real Mode Window resides at E0000H.

Jumper

W11 7/8 open*

W11 7/8 shorted

*Default

Window Address Selection (W11)

Table 4-2.

Selects window address D0000h

Selects window address E0000h

Chapter 4 - Memory Expansion Module Installation

Note

Function

4-3

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