PPU

Memory Map

addr	contant	addr	contant
$0000 ~ $1FFF	Pattern Tables	$0000 ~ $0FFF	Pattern Table 0
		$1000 ~ $1FFF	Pattern Table 1
$2000 ~ $3EFF	Name Tables	$2000 ~ $23BF	Name Table 0
		$23C0 ~ $23FF	Attribute Table 0
		$2400 ~ $27BF	Name Table 1
		$27C0 ~ $27FF	Attribute Table 1
		$2800 ~ $2BBF	Name Table 2
		$2BC0 ~ $2BFF	Attribute Table 2
		$2C00 ~ $2FBF	Name Table 3
		$2FC0 ~ $2FFF	Attribute Table 3
		$3000 ~ $3EFF	Mirrors $2000 ~ $2EFF
$3F00 ~ $3FFF	Palettes	$3F00 ~ $ 3F0F	Image Palette
		$3F10 ~ $3F1F	Sprite Palette
		$3F20 ~ $3FFF	Mirrors $3F00 ~ $3F1F
$4000 ~ $FFFF	Mirrors $0000 ~ $3FFF	$4000 ~ $FFFF	Mirrors $0000 ~ $3FFF

Common Name	Address	Bits	Notes
PPUCTRL	$2000	`VPHB SINN`	NMI enable (V), PPU master/slave (P), sprite height (H), background tile select (B), sprite tile select (S), increment mode (I), nametable select (NN)
PPUMASK	$2001	`BGRs bMmG`	color emphasis (BGR), sprite enable (s), background enable (b), sprite left column enable (M), background left column enable (m), greyscale (G)
PPUSTATUS	$2002	`VSO- ----`	vblank (V), sprite 0 hit (S), sprite overflow (O); read resets write pair for $2005/$2006
OAMADDR	$2003	`aaaa aaaa`	OAM read/write address
OAMDATA	$2004	`dddd dddd`	OAM data read/write
PPUSCROLL	$2005	`xxxx xxxx`	fine scroll position (two writes: X scroll, Y scroll)
PPUADDR	$2006	`aaaa aaaa`	PPU read/write address (two writes: most significant byte, least significant byte)
PPUDATA	$2007	`dddd dddd`	PPU data read/write
OAMDMA	$4014	`aaaa aaaa`	OAM DMA high address

NN: Base nametable address(0 = $2000; 1 = $2400; 2 = $2800; 3 = $2C00)

I: VRAM address increment per CPU read/write of PPUDATA (0: add 1, going across; 1: add 32, going down)

S: Sprite pattern table address for 8x8 sprites(0: $0000; 1: $1000; ignored in 8x16 mode)

B: Background pattern table address (0: $0000; 1: $1000)

H: Sprite size (0: 8x8 pixels; 1: 8x16 pixels)

P: PPU master/slave select(0: read backdrop from EXT pins; 1: output color on EXT pins)

V: Generate an NMI at the start of the vertical blanking interval (0: off; 1: on)

G: Greyscale (0: normal color, 1: produce a greyscale display)

m: 1: Show background in leftmost 8 pixels of screen, 0: Hide

M: 1: Show sprites in leftmost 8 pixels of screen, 0: Hide

b: 1: Show background

s: 1: Show sprites

BGR: Emphasize blue, green, red