;------------------------------------------------------------
; NES hardware registers
;------------------------------------------------------------

PPUCTRL        = $2000
PPUMASK        = $2001
PPUSTATUS      = $2002
OAMADDR        = $2003
OAMDATA        = $2004
PPUSCROLL      = $2005
PPUADDR        = $2006
PPUDATA        = $2007

SQ1_VOL        = $4000
SQ1_SWEEP      = $4001
SQ1_LO         = $4002
SQ1_HI         = $4003

SQ2_VOL        = $4004
SQ2_SWEEP      = $4005
SQ2_LO         = $4006
SQ2_HI         = $4007

TRI_LINEAR     = $4008
TRI_LO         = $400A
TRI_HI         = $400B

NOISE_VOL      = $400C
NOISE_LO       = $400E
NOISE_HI       = $400F

OAMDMA         = $4014
APUSTATUS      = $4015
JOY1           = $4016
JOY2           = $4017


APUPC1BASE = $4000
APUPC1SWEEP = $4001
APUPC1TLOW = $4002
APUPC1THIGH = $4003

APUPC2BASE = $4004
APUPC2SWEEP = $4005
APUPC2LOW = $4006
APUPC2HIGH = $4007

APUTRIBASE = $4008
APUTRILOW = $400A
APUTRIHIGH = $400B

APUNOISEBASE = $400C
APUNOISELOOP = $400E
APUNOISELENGTH = $400F

APUDMABASE = $4010
APUDMALOAD = $4011
APUDMAADDR = $4012
APUDMALEN = $4013

APUCTRL = $4015
APUFRAMECNT = $4017