Specifications

Configuration and Installation
2 2
2-7
Once you have determined where the jumpers need to be, you must determine how to
jumper your particular backplane. Different backplane manufacturers handle this in
different ways; some provide stake pins on the rear of the backplane while others
provide stake pins on the front of the backplane. These stake pins can be located in
several different places.
If the stake pins are on the rear of the backplane, the most common location is in the
middle of the J1 connector as shown in Figure 2-4. The connector may have wire-
wrap tails on all pins, or just on the bus-grant and IAC pins.
Stake pins (front or rear) can also be located adjacent to the slot being jumpered as
shown in Figure 2-5. Typically, the stake pins are located between the slot being
jumpered and the next lower-numbered slot (e.g. jumpers for Slot 6 would be located
adjacent to Slot 6 between Slots 5 and 6).
BG0
BG1
BG2
BG3
IACK
J1 Connector
Figure 2-4. VMEbus Jumpers on Rear
Wirewrap Pins.
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