Lasse Madsen wrote:
>=20
> Hey all
>=20
> I have made some simple code for the 12C509A and when i compile it =
i get:
>=20
> Error[120]  Call or jump not allowed at this address ((must be in l=
ow half of page)
> Warning[227]  Substituting RETLW 0 for RETURN pseudo-op
>=20
> The pice of code that is reported not to work is:
>=20
> nr1 movlw 0xFF
>  movwf counter
> loop BCF GPIO,3
>  CALL    pulse   ; HERE IS THE ERROR 120 !
>  BSF     GPIO,3
>  CALL    farve_1  : ALSO HERE !
>  decfsz counter,f
>  goto loop
>  BCF GPIO,3
>  return        ; HERE IS THE =B4WARNING 227 !
>=20
> Why cant i use call and return with the 12C509 ??!?!?

If you visit the data sheet, you will see that RETURN is not supporte=
d
on 12 bit cores, only RETLW.

The CALL instruction only carries enough address information to allow
subroutines in the lower 256 ROM addresses. Try moving your subroutin=
es
closer to the start of your code.

--=20
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

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