Information about the Datel Comms Link ISA card

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Here's some information about the Datel Comms Link ISA card:

Comms Link schematic (BSch CE3)

Comms Link schematic (PNG)

Comms Link PAL equations

Comms Link PAL pin assignments

Comms Link state machine diagram

For convenience the schematic uses a 24-pin DIP PAL, but the real thing has a 28-pin PLCC part which is described in the pin assignents document.

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