mmm,
Code:
asm
MOVFF WREG,wsave ; copy W to wsave register
MOVFF STATUS,ssave
CLRF STATUS ; change to bank 0 regardless of current bank

INT_CODE

MOVFF R0,_R0_2
MOVFF R0+1,_R0_2+1
should be..
Code:
asm
INT_CODE
    MOVFF WREG,wsave ; copy W to wsave register
    MOVFF STATUS,ssave
    CLRF STATUS ; change to bank 0 regardless of current bank



    MOVFF R0,_R0_2
    MOVFF R0+1,_R0_2+1