The XVME-956 PC/AT family of products is designed to provide I/O expansion for Xycom's XVME VMEbus PC/AT products.
The XVME-956 consists of two sets of carrier cards and the accompanying daughter modules with either a PC/XT or PC/AT interface.
When the daughter modules are installed onto a carrier, the resulting module occupies a single double-high VMEbus card slot.
The XVME-956 is designed to operate with Xycom's VMEbus PC/AT processor modules.
the slots.
7. Push the modules slowly to the rear of the chassis until the P1 and P2 connectors engage.
8. App l y straightforward pressure to the handles on the front of the panels until the connectors are fully engaged and properly seated.
Do not use excessive force to engage the connectors.
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.
The 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.
With 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. If 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).
