Gentlemen - I could really use some help programming
a ZILOG Z8530 serial comm controller chip....
I am running SDLC loop mode as a slave station
and have captured a poll by setting GAOP bit.
When I transmit a response all is well, loop
communications remains normal.
Occasionally I find I have nothing to transmit
and must pass the poll without activating my
transmitter. Have cleared GAOP bit but chip
transmitter seems to remain active and the
chip no longer repeats received data with a
one bit delay....
Any ideas on how to deactivate transmitter
when a poll has been captured in loop mode
without actually making a transmission?