CompuServe Messages

Thanks for the input. I'll sign off and cogitate, but in the meantime, here's a bit (heh) more: I think the BCR connector could be used to monitor the status of all the relays. A resistor (I used 33k) across the BCR (2-5 or 2-7) pins appears to INP(187) as an "open" switch (a direct short appears as "closed"). The eight status bits could be produced at the black box by just ( electronically) throwing a resistor into the BCR sensing line for each "0" ( open) bit. Can produce a timed 8-bit sequence. Timing would be handled at the box with a 555 timer, and by timing loops at the 100 end. Just one wire, because I think we can use the RS232 ground. But I haven't looked at the cassette interface diagrams yet. Could be all sorts of goodies there too, huh? I'm trying to keep this simple due to my own limitations. If any good engineers wanted to colaborate, we could make the sucker sing!!!