NES Programming/Memory Map

CPU Memory Map

Address	Size	Description
$0000	0x800	2KB of work RAM
$0800	0x800	Mirror of $000-$7FF
$1000	0x800	Mirror of $000-$7FF
$1800	0x800	Mirror of $000-$7FF
$2000	0x8	PPU Ctrl Registers
$2008	0x1FF8	*Mirror of $2000-$2007
$4000	0x20	Registers (Mostly APU)
$4020	0x1FDF	Cartridge Expansion ROM
$6000	0x2000	SRAM
$8000	0x4000	PRG-ROM
$C000	0x4000	PRG-ROM

* Mirrored 1023 times, not including $2000 - $2007.

PPU Memory Map

Address	Size	Description
$0000	$1000	Pattern Table 0
$1000	$1000	Pattern Table 1
$2000	$3C0	Name Table 0
$23C0	$40	Attribute Table 0
$2400	$3C0	Name Table 1
$27C0	$40	Attribute Table 1
$2800	$3C0	Name Table 2
$2BC0	$40	Attribute Table 2
$2C00	$3C0	Name Table 3
$2FC0	$40	Attribute Table 3
$3000	$F00	Mirror of 2000h-2EFFh
$3F00	$10	BG Palette
$3F10	$10	Sprite Palette
$3F20	$E0	Mirror of 3F00h-3F1Fh

Links

• Nes specifications - Detailed information on every aspect of the NES
• Nintendo Entertainment System Documentation - More information on the NES
• Brad Taylor's NES documentation - NES documentation written by Brad Taylor
• Visual 2A03 and 2C02 - Simulators of chips at hardware level
• NES memory map - Additional reference with references