Hi, this question is concerning DTMF generation again.  I am not very
experienced with the PIC's and the code that is already out there just
confuses me.  Since a DTMF tone is just the two tones mixed, I would
like to know if its possible for me to make a small program that creates
a sine wave on 2 pins, and then just mix the two together.  I was unable
to find any info on the web about generating sine waves, and how i could
figure out what freq they would be at, also how I would make two at the
same time, one for the lower portion, and one for the upper portion,
each outputting to a seperate pin.  I realize this isn't the best way,
but I think it will help me to learn a little more, jumping to PWM
assembly code just has my mind going in circles  :)

p.s.  I use the 16C84 running off a color burst crystal  (about 3.579275
MHZ)

Thanks a lot
John