_custom equ  $00dff000
_bltddat equ $00dff000
_dmaconr equ $00dff002
_vposr equ   $00dff004
_vhposr equ  $00dff006
_dskdatr equ $00dff008
_joy0dat equ $00dff00a
_joy1dat equ $00dff00c
_clxdat equ  $00dff00e
_adkconr equ $00dff010
_pot0dat equ $00dff012
_pot1dat equ $00dff014
_potinp equ  $00dff016
_serdatr equ $00dff018
_dskbytr equ $00dff01a
_intenar equ $00dff01c
_intreqr equ $00dff01e
_dskpt equ   $00dff020
_dsklen equ  $00dff024
_dskdat equ  $00dff026
_refptr equ  $00dff028
_vposw equ   $00dff02a
_vhposw equ  $00dff02c
_copcon equ  $00dff02e
_serdat equ  $00dff030
_serper equ  $00dff032
_potgo equ   $00dff034
_joytest equ $00dff036
_bltcon0 equ $00dff040
_bltcon1 equ $00dff042
_bltafwm equ $00dff044
_bltalwm equ $00dff046
_bltcpt equ  $00dff048
_bltbpt equ  $00dff04c
_bltapt equ  $00dff050
_bltdpt equ  $00dff054
_bltsize equ $00dff058
_bltcmod equ $00dff060
_bltbmod equ $00dff062
_bltamod equ $00dff064
_bltdmod equ $00dff066
_bltcdat equ $00dff070
_bltbdat equ $00dff072
_bltadat equ $00dff074
_cop1lc equ  $00dff080
_cop2lc equ  $00dff084
_copjmp1 equ $00dff088
_copjmp2 equ $00dff08a
_copins equ  $00dff08c
_diwstrt equ $00dff08e
_diwstop equ $00dff090
_ddfstrt equ $00dff092
_ddfstop equ $00dff094
_dmacon equ  $00dff096
_clxcon equ  $00dff098
_intena equ  $00dff09a
_intreq equ  $00dff09c
_adkcon equ  $00dff09e
_aud equ     $00dff0a0
_bplpt equ   $00dff0e0
_bplcon0 equ $00dff100
_bplcon1 equ $00dff102
_bplcon2 equ $00dff104
_bpl1mod equ $00dff108
_bpl2mod equ $00dff10a
_bpldat equ  $00dff110
_sprpt equ   $00dff120
_spr equ     $00dff140
_color equ   $00dff180




    xdef    _custom
    xdef    _bltddat
    xdef    _dmaconr
    xdef    _vposr
    xdef    _vhposr
    xdef    _dskdatr
    xdef    _joy0dat
    xdef    _joy1dat
    xdef    _clxdat
    xdef    _adkconr
    xdef    _pot0dat
    xdef    _pot1dat
    xdef    _potinp
    xdef    _serdatr
    xdef    _dskbytr
    xdef    _intenar
    xdef    _intreqr
    xdef    _dskpt
    xdef    _dsklen
    xdef    _dskdat
    xdef    _refptr
    xdef    _vposw
    xdef    _vhposw
    xdef    _copcon
    xdef    _serdat
    xdef    _serper
    xdef    _potgo
    xdef    _joytest
    xdef    _bltcon0
    xdef    _bltcon1
    xdef    _bltafwm
    xdef    _bltalwm
    xdef    _bltcpt
    xdef    _bltbpt
    xdef    _bltapt
    xdef    _bltdpt
    xdef    _bltsize
    xdef    _bltcmod
    xdef    _bltbmod
    xdef    _bltamod
    xdef    _bltdmod
    xdef    _bltcdat
    xdef    _bltbdat
    xdef    _bltadat
    xdef    _cop1lc
    xdef    _cop2lc
    xdef    _copjmp1
    xdef    _copjmp2
    xdef    _copins
    xdef    _diwstrt
    xdef    _diwstop
    xdef    _ddfstrt
    xdef    _ddfstop
    xdef    _dmacon
    xdef    _clxcon
    xdef    _intena
    xdef    _intreq
    xdef    _adkcon
    xdef    _aud
    xdef    _bplpt
    xdef    _bplcon0
    xdef    _bplcon1
    xdef    _bplcon2
    xdef    _bpl1mod
    xdef    _bpl2mod
    xdef    _bpldat
    xdef    _sprpt
    xdef    _spr
    xdef    _color