Hi Bo, Am 3. September 2018 09:52:20 schrieb Bo Zimmerman <bo@zimmers.net>: > Hello all, > > After check both(!) books on Plus/4 programming, and the 6551 schematic, > and doing experimenting... I have a question. Does anyone know the > kosher way to change the user port RTS signal so that the modem knows to > stop transmitting data while a program catches up? I'm initializing the > Command Register to 5 (RTS low/enabled, DTR enabled, IRQ, no party, no > echo). But bad things seem to happen when I attempt to touch it again > to change RTS to high/disabled. Does anyone have any knowledge or > experience with this? In my experience the rts/cts/dtr lines are completely broken in the ACIA. They switch off rx and/or tx at inconvenient times and in the middle of transactions. So no, I don't know a good wayof using them, sorry André > - Bo > > > > > >Received on 2018-09-03 11:00:20
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