; NES hardware access

PPUCTRL   = $2000
PPUMASK   = $2001
PPUSTATUS = $2002
OAMADDR   = $2003
OAMDATA   = $2004
PPUSCROLL = $2005
PPUADDR   = $2006
PPUDATA   = $2007
DMCFREQ   = $4010
OAMDMA    = $4014
CTRLPORT1 = $4016
CTRLPORT2 = $4017