Specifications

EPC-8 Hardware Reference
2 2
2-4
The EPC-8 plus EXM expansion modules plus any mass storage module can be
considered together as a single subsystem. Use the following worksheet in Table 2-1
to determine the total number of VME slots your particular subsystem configuration
requires.
Product VME Slots
Total
Double-slot EPC-8
(Includes first two EXM modules) 2
Additional EXP-MC(s)
(Holds additional two EXM modules)
1
each
EXP-AM 2
Mass Storage Module (EXP-MX) 2
Total VMEbus slots used ...........................
Table 2-1. VME Slots Available.
Once you have determined where the EPC-8 subsystem will be physically located in
the chassis, the VME backplane must be jumpered appropriately.
Installing the VMEbus Backplane Jumpers
The VMEbus propagates four bus grant signals ( BG0 - BG3 ) and one interrupt
acknowledge signal ( IACK ) via daisy-chain lines. Per the VMEbus specifications, all
boards (that plug into the backplane) are required to correctly handle these signals.
All slots that do not have a board plugged into the backplane (i.e. empty slots and slots
occupied by EXMs or mass storage modules), need to be jumpered to allow the
signals to pass through to other boards in the system.
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