!base1 = $0000
!base2 = $0000

if read1($00FFD6) == $15
sfxrom
!base1 = $6000
!base2 = !base1
elseif read1($00FFD5) == $23
sa1rom
!base1 = $3000
!base2 = $6000
endif

org $0086F7
JML [$0000|!base1]