> DISPLAY
>       movwf _w          ; Save
>       swapf status,w          ; Save
>       movwf _status           ; Save
>       bcf   intcon,2          ; Clear interrupt bit

As J-E said, better to use the assigned name for a bit

So, bcf intcon,t0if

J-E suggested moving it to just before the RETFIE. What's
important is that it is cleared somewhere in the ISR and
that IRQs do not come faster than the ISR can process
them

And for those status tests, there are more readable ways
to do it

For btfss status,2 you can use the MPLAB pseudo-op
"skpz" or define your own. eg #define zero  status,2, and
use btfss zero. Similarly with skpnz, skpc, skpnc etc

>        goto       $+3         ; No, leave and do it again later.

Ditto J-E, goto a label. Makes reading program flow a lot
clearer. I am guilty of using goto $-1 (or goto $-2) for a
bit-wait-test loop

> ****Table located in main code******

You HAVE to be sure where that table winds up in memory
or you could have a PCLATH problem, if for example the
table crosses a page boundary. That doesn't sound like your
problem at this time because the program doesn't *appear* to
be crashing. On the face of it it should work. You should
ensure that the section of code is in the bank you want - maybe
you're addressing trisb instead of portb ?

==========================

Example 3

There is no branch in this test to get to the next. Whatever the
result, PC goes to LOOPDEC

>       movfw LOOP        ; LOOP to w
>       sublw d'3'        ; 3 - LOOP in w
>       btfss status,2          ; LOOP = 3?
>        goto LOOPDEC     ; No, leave.
>       bcf   portb,2           ; Yes, turn on 100 digit
>       goto  LOOPDEC     ; Yes, leave.

>       movfw LOOP        ; LOOP to w
>       sublw d'2'        ; 2 - LOOP in w
>       btfss status,2          ; LOOP = 2?
>        goto LOOPDEC     ; No, leave.
>       bcf   portb,1           ; Yes, turn on 10 digit
>       goto  LOOPDEC     ; Yes, leave.




-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist