> goto  $ + 1
>
> Basically, I am confused as to what the $ represents.

The $ represents the address of that instruction.  GOTO $+1 is of dubious
value, but you may have seen GOTO $-1, which can be useful.  For example:

    btfss   portb, 3     ;is it toast yet?
    goto    $-1          ;no, go back and check again
;
;   Toasted to golden perfection.
;



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