Xycom XVME-976/202, Manual

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Chapter 4 - Memory Expansion Module Installation
4-3
General Module Setup
This section describes how to configure the following:
Window Address
System Power Fail Interrupt
Control Register Address
Board Number
Note
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.
Window Address Selection
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.
Table 4-2.
Window Address Selection (W11)
Jumper Function
W11 7/8 open* Selects window address D0000h
W11 7/8 shorted Selects window address E0000h
*Default