Hi everyone. Sorry if this is a silly question.

I have a subroutine called PULSE that oscilates one of the pins on the =
16F84. It does this by using BCF and BSF to set and clear that pins bit =
on porta.. so basically there are some loops and instructions like=20
BCF PORTA,1

My question is: how can I modify my subroutine so that I can set which =
pin to oscillate. I want to be able to do something like:

movlw     1; load w with number of pin on porta to pulse
call    ping; oscillate pin 1
movlw    2;now load in new pin number
call    ping ;    oscillate pin 2.

How can I do this? Are instructions like BCF porta,w valid? I've tried =
this and it doesn't seem to work.=20
Any suggestions much appreciated.
sam.

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