XYCOM XVME-956 Optical Disc Module XVME956

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 XVME-956 provides the following features:

Disk, Serial I/O, and SCSI. The carrier cards (XVME-956/1 and XVME-956/12) are made to be compatible with Xycom's line of VMEbus PC/AT products. The XVME-956/12 is for use with the Xycom XVME-PC/AT modules with PC/104 Expansion sites. 

Both the XVME-956/1 and 956/12 provide two expansion module sites and sit adjacent to the VMEbus PC/AT. 

The XVME-956/3 expansion kit provides the necessary standoffs and mating connectors for single module expansion on an XVME-PC/AT with an on-board PC/104 expansion site.

Two types of expansion modules are offered. 

Type B modules have industry standard PC/104 mechanical dimensions of 3.550" x 3.775". Each Type B module requires a separate Xycom front panel kit . Type A modules are 4.010" x 5.091" and are functionally the same as Type B modules but have an integral front panel. 

Type A modules do not require a front panel kit.

ARRIER CARD INSTALLATION

WARNING

Cards in the VMEbus Rack

Procedure

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).