; PPU registers 
PPUCTRL = $2000
PPUMASK = $2001
PPUSTATUS = $2002
OAMADDR = $2003
OAMDATA = $2004
PPUSCROLL = $2005
PPUADDR = $2006
PPUDATA = $2007
OAMDMA = $4014
JOY1 = $4016

; Variables
PpuControlShadow = $10
PpuMaskShadow = $11
Controller1Held = $14
Controller1Pressed = $15
Controller2Held = $16
Controller2Pressed = $17
ControllerState = Controller1Held
NmiDispatchMode = $40
NmiState = $41
MenuSelectionIndex = $42
NmiSequenceStep = $44
NmiSyncState = $48
InputActionLatch = $49
OamBuffer = $0200
PersistentRecord0 = $0580
PersistentRecord1 = $05A3
ResetMagic1 = $05CE
ResetMagic2 = $05CF
PersistentBuffer = $06E0
PAD_RIGHT=$01
PAD_LEFT=$02
PAD_DOWN=$04
PAD_UP=$08
PAD_START=$10
PAD_SELECT=$20
PAD_B=$40
PAD_A=$80
PAD_HORIZONTAL=PAD_LEFT|PAD_RIGHT
PAD_VERTICAL=PAD_UP|PAD_DOWN
PAD_DPAD=PAD_HORIZONTAL|PAD_VERTICAL
PAD_MENU_INPUT=PAD_SELECT|PAD_START|PAD_VERTICAL
MENU_HORIZONTAL_COUNT=$05
MENU_VERTICAL_COUNT=$06
MENU_ACTION_NONE=$00
MENU_ACTION_ACCEPTED=$04
NMI_SYNC_PENDING=$FF
NMI_SYNC_COMPLETE=$01
RESET_MAGIC_1=$A5
RESET_MAGIC_2=$5A
PPUCTRL_NMI_ENABLE=$80

WorkingBuffer = $05E0
PERSISTENT_BUFFER_SIZE = $0100

StateTargetCA85 = $CA85

; Serial I/O helpers using $4016 (verified structure; peripheral identity unknown)
WriteSerialTiming    = $C62D
WaitSerialPulse      = $C639
TransmitPulseShort   = $C64E
TransmitPulseLong    = $C653
TransmitByte         = $C66E
IncrementSerialCount = $C68A
ReceiveSerialBit     = $C691
ReceiveByte          = $C6A5

; Block protocol helpers
TransmitRuntimeData        = $C6C8
TransmitDataBlock          = $C6D1
SetupTransmitRamBlock      = $C716
SetupTransmitWorkingBuffer = $C726
SetTransmitPreambleCounts  = $C734
ReceiveRuntimeData         = $C739
ReceiveDataBlock           = $C792
SerialBlockLength          = $0D
SerialBlockPtr             = $0E
SerialBitCountLo           = $08
SerialBitCountHi           = $09

; App Specific Variables
TMP00 = $00
TMP01 = $01