[MarkO]

My extended family had Commodore's and Atari's, I have an Apple //e.

The Apple ][, ][+, and //e have a couple Apple Made Serial Cards, called "The Serial Card" and "The Super Serial Card". I have a "Super Serial Card" around somewhere, Plus I have an "Echo II Speech Synthesizer" and other Apple and Non Apple peripherals.

TTL is Serial, just like RS-422/485 and RS-232 are, just a different Hardware Interface. There are converters for each of these to the other.

The Apple ][, ][+, and //e have both Analog and Digital Inputs, plus a few Digital Outputs on that 16 pin connector.

I would try to locate an Apple Serial Card (maybe near impossible) or use a Small Micro like in the FRC or Vex Controller to output a TTL Serial Data Stream to the speakJet chip, and use the Apple //e to control it with 0-+5 outputs to the FRC or Vex Controller's Inputs.

If you are limited to the Apple //e, you will most likely need some 6502 Assembler Code to drive the I/O at the Correct rate.

How soon until your Open House???