; hardware registers, from the pandocs http://nocash.emubase.de/pandocs.htm
rJOYP EQU $FF00
rDIV  EQU $FF04
rLCDC EQU $FF40
rSCY  EQU $FF42
rSCX  EQU $FF43
rBGP  EQU $FF47
rOBP0 EQU $FF48
rOBP1 EQU $FF49
rWY   EQU $FF4A
rWX   EQU $FF4B
rIE   EQU $FFFF

BTN_A      EQU %00000001
BTN_B      EQU %00000010
BTN_SELECT EQU %00000100
BTN_START  EQU %00001000
BTN_RIGHT  EQU %00010000
BTN_LEFT   EQU %00100000
BTN_UP     EQU %01000000
BTN_DOWN   EQU %10000000