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Since 21st May 2000

Copyright (c) 1999, 2000 Adrian Brown
If you have any complaints about this website or its contents, please email me and I will remove or update the offending section.

MEMORY ADDRESS (in Hex)	CONTENTS
FFFF - FFFF	Interrupt Enable Flag (see below)
FF80 - FFFE	Zero Page (127 bytes)
FF00 - FF7F	Hardware Registers (see Hardware section)
FEA0 - FEFF	Unusable Memory
FE00 - FE9F	Object Attribute Memory (OAM)
E000 - FDFF	Echo RAM (Reserved - Not Usable)
D000 - DFFF	Internal RAM - Banks 1 - 7 (CGB is switchable as it has 32k Internal RAM)
C000 - CFFF	Internal RAM - Bank 0 (fixed)
A000 - BFFF	Switchable 8k Game Cartridge RAM
9C00 - 9FFF	Background Display Data 2, Tile Indices/Attributes (bank switched)
9800 - 9BFF	Background Display Data 1, Tile Indices/Attributes (bank switched)
8000 - 97FF	Bank 0 and 1 Character Data (bank switched)
4000 - 7FFF	User Program Area - Bank 1 to n (switchable)
0150 - 3FFF	User Program Area - Bank 0 (fixed)
0100 - 014F	Cartridge Header (see Cart. Header section)
0000 - 00FF	Interrupt vectors and RST # vectors

The different sections of memory have different attributes. Some of the areas can only be written to while others can only be read from. The following table shows which areas have which attributes.

	DESCRIPTION	ATTRIBUTES	MEMORY
VRAM Memory Map	Tile Map 2	Read / Write	9C00 - 9FFF
	Tile Map 1	Read / Write	9800 - 9BFF
	Tiles 00 - 7F (FF40, bit 4 = 0)	Read / Write	9000 - 97FF
	Tiles 80 - FF	Read / Write	8800 - 8FFF
	Tiles 00 - 7F (FF40, bit 4 = 1)	Read / Write	8000 - 87FF
Memory Map (Read / Write)	Interrupt Enable	Read / Write	FFFF - FFFF
	High RAM	Read / Write	FF80 - FFFE
	I/O Registers	Read / Write	FF00 - FF7F
	OAM RAM	Read / Write	FE00 - FE9F
	Low RAM	Read / Write	C000 - DFFF
	Cartridge RAM	Read / Write	A000 - BFFF
	Video RAM	Read / Write	8000 - 9FFF
Memory Map (Read Only)	ROM Bank #1 to n	Read Only	4000 - 7FFF
	ROM Bank #0	Read Only	0000 - 3FFF
VRAM Memory Map (Write Only)	RAM/ROM Select (MBC1)	Write Only	6000 - 7FFF
	RAM Bank Select	Write Only	4000 - 5FFF
	ROM Bank Select MSB (MBC5)	Write Only	3000 - 3FFF
	ROM Bank Select LSB	Write Only	2000 - 2FFF
	RAM Bank Enable	Write Only	0000 - 1FFF