Hi all,

I have just started learning asm and playing around with a 16f84. I've
already read
a couple of tutorials from the net and now have a question. How do I create
a function
that uses a bit orientated command and pass its arguments via a register. I
have
included a small piece of code to try and illustrate.

#include        "p16f84.inc"
#DEFINE PAGE0 bcf STATUS,5
#DEFINE PAGE1 bsf STATUS,5

RBpin equ 0x0C          ; Port B pin number


        org 4
        goto start

start
        clrf    PORTB           ; clear portb
        PAGE1                   ; select bank 1
        clrf    PORTB           ; portb all output's
        PAGE0                   ; select bank 0

loop    movlw   0               ; bit 0 portb
        movwf   RBpin           ; move bit select into register
        call    foobar  ; test function
        goto loop

foobar

        bsf     PORTB,RBpin
        return

        END

When I compile this I get the error "Argument out of range.  Least
significant bits used".
I guess this is because bsf expects a single bit arg but I pass it a byte. I
tried loading
W with my bit number and then read W from within my function which worked
fine, but if I
need to pass 2 args I can't use W as one arg overwrites the other.

Any suggestions ?

Thanks Russell.