Hi,

Have you read the PWM examples on Scott Dattalo's pages?

http://www.dattalo.com

These are software examples, and therefore *you* have to carefully
maintain the timebase.  I have played with the 256-level one, and it
works quite well on a 12C508.  I have incorporated an optical
interruptor to measure speed and to vary PWM to maintain the output
speed.  You have to be a bit careful and count the instructions to fit
the gaps that Scott has left, but I have now added 300bd RS232 comms
(but no command interpreter yet...).

In general there is little point in all this, however, the '508 is
*cheap* and it's so cute you just have to write code and make it do
things.

Andy

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