Xycom XVME-956 Series Manual page 16

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1.2.2.2 Installing the Inter-Board Connector
All versions of the XVME-684, -686, and -687 modules route the PC/XT signals to rows A and C on
the VMEbus P2 backplane. Because rows A and C are not bussed on a standard VMEbus P2
backplane, an inter-board connector is installed to pass the PC/XT signals from the first to the adjacent
slot. T h e XVME-686 does not require this inter-board connector, and there will not be one installed on
the XVME-686 system unless the application already uses an XVME-956 or an XVME-951. W i t h the
addition of the XVME-956, this inter-board needs to be removed and replaced with a three-position
inter-board connector (XVME-686 and -956 only needs a two-position).
All AT signals from the XVME-684, -686, and -687 are received through rows A and C of the XVME-
956 connector P2, and from the inter-board connector P3. A three-position inter-board connctor will
be used to connect the XVME PC/AT to the XVME-956 module. I f the XVME-686 module is being
used, ensure that rows A and C on P2, in the third slot, are not being used by another VMEbus card or
contact the factory to exchange the three position inter-board connector for a two position inter-board
connector. (The three position inter-board connector is included with the XVME-956 module). Figure
1-2, on the following page, details the connection.
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Procedure
1. L o c a t e the P2 connectors of the three modules at the rear of the VMEbus backplane.
2. G e n t l y pull off the old inter-board that currently connects the CPU and I/O modules of the
XVME-684, or -687.
3. C o n n e c t the inter-board connector to the rear of the VMEbus P2 backplane by gently pressing
the connectors into the three P2 slots, matching up the pins marked 1.
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XVME-956 Manual
August 1994
1-7