org   $1000
         jmp   L0000

         org   $0000
L0000    bit:  L0000
L0003    lda   L0000
         lda   L0003
         dfb   $d0,$ba
         dfb   $30,$b8
         bvs   L0012
         bvc   L0080

lodat    dfb   $00
         dfb   $01
         dfb   $02

L0012    lda   lodat+1
         clc
         dfb   $90,$a9

         org   $0080
L0080    bit:  L0080
         jmp   LFFC6

         org   $ffc0
LFFC0    bit   LFFC0
LFFC3    clc
         dfb   $90,$3d

LFFC6    rts