Re:

>In an effort to try to debug the program that I am having trouble with, I
>have stripped it down to the very basic essentials. It is now a program

etc.

Again, you have a typo:

>         while(1)  // loop forever
>         {
>                 RC6=1;
>                 DelayMs(2) ;
>                 if (RA4 = 1)
>                 {

..

should be if (RA4 == 1)

Anyway, your _existing_ program toggles RD7 and RD6 every 92us on a
PIC16C77 @ 20MHz.

If you are running with a _crystal_, then there are a variety of
reasons why it might not start, though frankly I've never had any
problems with PICs and xtals.  If you're running with an external
oscillator-in-a-can (like what's on the PICDEM-2 board), that
eliminates yet more variables. The schematic in our Assembly Guide
AG-1 available on our website may be useful to you ...

One problem I've had with windowed parts is that they behave very
strangely if they are nut fully UV erased prior to (re-)programming.

You  don't mention what your "board" is ...

--

  ______________________________________
Andrew E. Kalman, Ph.D.


Salvo(TM), The RTOS that runs in tiny places(TM)
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750 Naples Street
San Francisco, CA 94112
tel: (415) 584-6360
fax: (415) 585-7948
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email: aek@pumpkininc.com

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