David Sprenkle <PICLIST@MITVMA.MIT.EDU> wrote:

> I am using the 12C508 for the processor.
>
> I am trying to debug a program by stepping through it using the
> simulator.  Like I said changing the input on pin GP3 to 0 using the
> Modify dialog box or simulator stimulus file make the simulator stay
> at the 01FF address.

David:

The 12C508's pin 4 serves a dual-purpose; it can be configured as
either GP3 (as you desire) or MCLR.

It sounds as though you've configured it as MCLR; check the chip
configuration and make sure that MCLR is disabled.

-Andy

=== Andrew Warren - fastfwd@ix.netcom.com
=== Fast Forward Engineering - Vista, California
=== http://www.geocities.com/SiliconValley/2499