Beezer Memory Map

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Memory Map

The following is a memory map that was generated based on the MAME source code (.180). This information is only as accurate as the MAME driver is. If you see any errors, please let me know what that error is.

The Memory Area is related to where the information is from (CPU, Sound Board, etc..), and it may also reflect what it has in common with other hardware.

Beezer (Tong Electronic, 1982)

Memory Area:main_map

Address Range	Length	Function	Description
0x0000-0xBFFF	49152	RAM, Shared	videoram
0xC000-0xCFFF	4096	ROM Bank	bank1
0xD000-0xDFFF	4096	ROM, Write	beezer_bankswitch_w (// ROM at G1, bankswitch)
0xE000-0xFFFF	8192	ROM	(// ROMS at G3, G5)

Memory Area:sound_map

Address Range	Length	Function	Description
0x0000-0x07FF	2048	RAM	(// RAM at 0D)
0x0800-0x0FFF	2048	RAM	(// optional RAM at 2D (can be rom here instead))
0x1000-0x1007	8	Mirror, Device Read/Write	0x07f8, custom, beezer_sound_device, sh6840_r, sh6840_w
0x1800-0x180F	16	Mirror, Device Read/Write	0x07f0, via6522_1, via6522_device, read, write
0x8000-0x8003	4	Mirror, Device Write	0x1ffc, custom, beezer_sound_device, sfxctrl_w
0xE000-0xFFFF	8192	ROM	(// ROM at 6D)

ROM Map for this game

This is the ROM map for the game. This should tell you what address the ROM is at, how big it is, what it's used for.

Memory Area:audiocpu

Address Range	Length	Label/Location	Description
0xF000-0xFFFF	4096	d7	CRC(23b0782e) (Fluke: 2505)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0xD000-0xDFFF	4096	g1	CRC(3467a0ec) (Fluke: 6ECE)
0xE000-0xEFFF	4096	g3	CRC(9950cdf2) (Fluke: E197)
0xF000-0xFFFF	4096	g5	CRC(a4b09879) (Fluke: 7E3D)
0x12000-0x13FFF	8192	f1	CRC(ce1b0b8b) (Fluke: 4EB7)
0x14000-0x15FFF	8192	f3	CRC(6a11072a) (Fluke: F53E)
0x16000-0x16FFF	4096	e1	CRC(21e4ca9b) (Fluke: 4612)
0x16000-0x16FFF	4096	e1	CRC(21e4ca9b) (Fluke: 4612)
0x18000-0x18FFF	4096	e3	CRC(a4f735d7) (Fluke: 8D0B)
0x18000-0x18FFF	4096	e3	CRC(a4f735d7) (Fluke: 8D0B)
0x1A000-0x1AFFF	4096	e5	CRC(0485575b) (Fluke: A496)
0x1A000-0x1AFFF	4096	e5	CRC(0485575b) (Fluke: A496)
0x1C000-0x1CFFF	4096	f5	CRC(4b11f572) (Fluke: AF6A)
0x1C000-0x1CFFF	4096	f5	CRC(4b11f572) (Fluke: AF6A)
0x1E000-0x1EFFF	4096	f7	CRC(bef67473) (Fluke: F2D4)
0x1E000-0x1EFFF	4096	f7	CRC(bef67473) (Fluke: F2D4)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	d1.cpu	CRC(8db17a40) (Fluke: 7B1D)
0x0000-0x00FF	256	d1.cpu	CRC(8db17a40) (Fluke: 7B1D)
0x0100-0x01FF	256	e1.cpu	CRC(3c775c5e) (Fluke: 683D)
0x0100-0x01FF	256	e1.cpu	CRC(3c775c5e) (Fluke: 683D)