Michael,

Let me try to explain what is going wrong by rewriting the comments in
your code. I have not changed or removed any commands, just the
comments.

pascnt1
        movlw   0x05
        movwf   C1              ;counter contains value 5

setbitaf
        clrf    PORTB           ;portb leds all off
        bsf     PORTA,0         ;first led of porta is lit
pointaf
        decf    C1,f            ;decrease counter by one
        call    delay           ;wait a bit
        bcf     STATUS,C
        rlf     PORTA,same      ;change to the next led in porta
        btfsc   PORTA,3         ;if the fourth led is lit
        goto    pascnt2         ;time to switch ports
                                ;but hang on we only just lit the
                                ;fourth led. Don't we need to wait
                                ;a bit?
        movf    C1,f            ;when PORTA,3 is lit, C1=2 so Z will
                                ;never be set by this command
        btfss   STATUS,Z        ;Z is never set so we always execute
                                ;the next instruction
        goto    pointaf         ;keep processing porta
pascnt2
        movlw   0x09            ;switching to portb so
        movwf   C1              ;load counter with 9
setbitbf
        clrf    PORTA           ;turn all porta off
                                ;remember this is only 5 instructions
                                ;since we turned it on!!
        bsf     PORTB,0         ;turn on portb's first led
..........etc

Do you see how your delays are misplaced? A simple fix would be to
insert another "call delay" immediately after pascnt2. You'll need to
modify your reverse routines in a similar way.

Also, to tidy up your code, ask yourself these questions;

        What does the counter do?
        What does checking PORTA,3 do?

If the answers to these are the same then you most likely only need one
of them.

        When will the Z flag be set?
        Can this ever happen?

I hope all this is helpful. PICs are great fun to work with. Out of
interest, what are you using to program them?

Rob

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