>Should the SBC immediately echo anything which is typed on theterminal?
>> Yes. Most likely you have some problem between the TXD outputfrom >>your PC and the RXD pin on the UART, although it could be the
receive >>flag (that isn't tested by the POST).
>> I still wish you'd post this discussion to the newsgroup.Thanks Bob.
Does the receive flag appear on pin 19 of the UART?
>Does the receive flag appear on pin 19 of the UART?This pin is asserted when the UART receives a character, which is probably
enough for your testing. The actual keyboard flag, as it's seen by the
PDP-8 software, is a little more complicated and the logic for that is
inside the IOT GALs.
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