Agree...change the $-1 to a real label.  Have you used the debugger to single step and watch the PC to see where it might be getting lost at?  Maybe pist the list file and take a look at how its setting up the addressing.

John Piccirillo <jpicciri@comcast.net> wrote:I'm having a tremendous problem with a simple program. It's gotten
bizarre. The program works in the MPLAB simulator but not running
on a 16F84 (I tried an old 16C84 with the same results). Here's two
fragments: one works in the code, the other doesn't.

The following works:

again:
btfsc PORTA, 4 ;check for button press - normal hi
goto again ;button not pressed
btfss PORTA, 4 ; check button released
goto $-1
call debounce ;4 ms time delay

The following does NOT work:

again:
nop
nop
btfsc PORTA, 4 ;check for button press - normal hi
goto again ;button not pressed
btfss PORTA, 4 ;check button released
goto $-1
call debounce

however, using only one nop works.

If posting the entire code would help, its not long, I'd be glad to do so.

Any help is greatly appreciated.

John-


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