Den Mon, 03 Sep 2018 10:14:53 +0200 skrev André Fachat <afachat@gmx.de>: > 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 The A2232 7-port serial card for Amiga uses the 6551 and it seems to think that CTS and DCD is really broken and uses a separate 8520 CIA instead of the 6551's for those signals. Btw this is probably well known but there is an alternative driver available on Aminet which afaik is a complete rewrite, making that card able to run at 115200 on it's fist two ports with no data loss and almost no cpu load on the Amiga. -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies.Received on 2018-09-03 23:00:05
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