[stella] Joystick Port Baud rate...

Subject: [stella] Joystick Port Baud rate...
From: cybergoth@xxxxxxxx
Date: Wed, 14 Nov 2001 15:02:31 +0100 (CET)
Hi there!

Here's a question for the hardware gurus:

If one would try to use the Joystick port as a serial
interface, what would the maximum baud rate be,
to which the port could react with clear readings?

In the archive the information is a bit blurry...
It says all values from 300-1200 baud, then there's
Jim Nitchall saying they had 3-5K running over
C64/Apple/Atari Joystick ports and a very recent
note from Chad Schell, quote:

"The 2600 is capable of doing up to 38.4Kbaud 
with auto baud rate detection.  Of course that's 
just receive."

Now, here I'm not sure, _where_ the 
VCS received the data.

Chad, could you please go into detail,
What and how you did it?

I'd be interested in the source for
receiving this data, too.
Especially the auto detection and how
you went along without interrupts.

38.4K would leave you some 25 cycles/bit, right?
Did you synchronize with timers or extreme 
precisely calculated loops?


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