Mark Peterson <PICLIST@MITVMA.MIT.EDU> wrote:

> I have a couple of errors in MPASM that are troubling. I commmented
> the offending lines out to assemble but of course that's a nowhere
> solution.
>
> In the heading area I used  _CONFIG FFF9. I tried it with 0xFFF9,
> h'FFF9', etc. but still get error.

    Try it with TWO underscores instead of one.

    Also, make sure that there's some white space to the left of the
    directive; "__CONFIG" should NOT begin in column one.

> As per datasheet for 16Cxx's when first enter interrupt routine must
> SAVE_STATUS and SAVE_Wreg. A temp copy of Wreg must exist on page0
> and page1 at the same relative location. I tried this as
>
> W_tem   EQU     0x20            ;page0 location of W_tem
> W_tem   EQU     0xA0            ;page1 location of W_tem.
>
> The idea is that by restoring the STATUS reg first the correct bank
> can be pointed to for retrieval of the current copy of the
> accumulator.
>
> MPASM didn't like the second equate. So what am I doing wronnnnnng!

    You're attempting to redefine a symbol.  This is illegal; each
    symbol may be EQU'ed only once.  Rename the second symbol
    "W1_tem" or something.  Your interrupt routine won't change;
    it should still refer only to "W_tem".

    -Andy

Andrew Warren - fastfwd@ix.netcom.com
Fast Forward Engineering, Vista, California
http://www.geocities.com/SiliconValley/2499