Great Guns 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.

Great Guns (Stern Electronics, 1983)

Memory Area:greatgun_io_map

Address Range	Length	Function	Description
0x004C	1	Write	main_sound_w
0x0060	1	Write	zpu_bcd_decoder_w
0x0062	1	Read	zpu_inputs_r
0x0066	1	Write NOP
0x0068	1	Write NOP
0x006E-0x006F	2	Write	zpu_led_w

Memory Area:greatgun_sound_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	ROM
0x2000-0x27FF	2048	RAM
0x4000	1	Device Read	ay1, ay8910_device, data_r
0x4000-0x4001	2	Device Write	ay1, ay8910_device, address_data_w
0x6000-0x6001	2	Device Write	ay2, ay8910_device, address_data_w
0x8000	1	Write	sound_int_clear_w
0xA000	1	Write	sound_nmi_clear_w

Memory Area:mazerbla_cpu3_io_map

Address Range	Length	Function	Description
0x0001	1	Device Write	vcu, mb_vcu_device, background_color_w
0x0002	1	Device Read, Write	vcu, mb_vcu_device, status_r, cfb_led_w
0x0003	1	Write	cfb_zpu_int_req_set_w
0x0004	1	Write	cfb_rom_bank_sel_w
0x0005	1	Device Write	vcu, mb_vcu_device, vbank_w

Memory Area:mazerbla_cpu3_map

Address Range	Length	Function	Description
0x0000-0x37FF	14336	ROM
0x3800-0x3FFF	2048	RAM, Shared	share1
0x4000-0x5FFF	8192	ROM Bank	bank1 (/* GFX roms */)
0x4000-0x4003	4	Device Write	vcu, mb_vcu_device, write_vregs
0x6000-0x67FF	2048	Device Read/Write	vcu, mb_vcu_device, read_ram, write_ram
0xA000-0xA7FF	2048	Device Read	vcu, mb_vcu_device, load_params
0xC000-0xDFFF	8192	Device Read	vcu, mb_vcu_device, load_gfx
0xE000-0xFFFF	8192	Device Read	vcu, mb_vcu_device, load_set_clr

Memory Area:mazerbla_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0xC000-0xC7FF	2048	RAM, Shared	share1
0xD800	1	Read	cfb_zpu_int_req_clr
0xE000-0xEFFF	4096	RAM

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:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	zpu0.1h	CRC(80cf2cbf) (Fluke: 1336)
0x2000-0x3FFF	8192	zpu1.2h	CRC(fc12af94) (Fluke: E6E7)
0x4000-0x5FFF	8192	zpu2.3h	CRC(b34cfa26) (Fluke: A9C6)
0x6000-0x7FFF	8192	zpu3.4h	CRC(c142ebdf) (Fluke: 55D2)

Memory Area:sub

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	psb.prom0.4a	CRC(172a793e),ROM number is silkscreened on the PCB & PCB location is also given (Fluke: CB48)

Memory Area:sub2

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	cfb0.7f	CRC(ee372b1f) (Fluke: A395)
0x2000-0x3FFF	8192	cfb1.8f	CRC(b76d9527) (Fluke: 9653)
0x10000-0x11FFF	8192	great_guns_psb0_ra1.rom0.5g	CRC(b4956100),banked at 0x4000 (Fluke: C04D)
0x14000-0x15FFF	8192	great_guns_psb1_ra1.rom1.5f	CRC(acdce2ee),ROM number is silkscreened on the PCB & PCB locations are also given (Fluke: B79F)
0x18000-0x19FFF	8192	great_guns_psb2_ra1.rom2.5d	CRC(cb840fc6) (Fluke: E156)
0x1C000-0x1DFFF	8192	great_guns_psb3_ra1.rom3.5c	CRC(86ea6f99) (Fluke: 82C3)
0x20000-0x21FFF	8192	great_guns_psb4_ra1.rom4.6g	CRC(65379893) (Fluke: 812A)
0x24000-0x25FFF	8192	great_guns_psb5_ra1.rom5.6f	CRC(f82245cb) (Fluke: AB1D)
0x28000-0x29FFF	8192	great_guns_psb6_ra1.rom6.6d	CRC(6b86794f) (Fluke: 8F37)
0x2C000-0x2DFFF	8192	great_guns_psb7_ra1.rom7.6c	CRC(60a7abf3) (Fluke: C297)
0x30000-0x31FFF	8192	great_guns_psb8_ra1.rom8.7g	CRC(854be14e) (Fluke: 5A19)
0x34000-0x35FFF	8192	great_guns_psb9_ra1.rom9.7f	CRC(b2e8afa3) (Fluke: 5D2C)
0x38000-0x39FFF	8192	great_guns_psb10_ra1.rom10.7d	CRC(fbfb0aab) (Fluke: 0754)
0x3C000-0x3DFFF	8192	great_guns_psb11_ra1.rom11.7c	CRC(ddcd3cec) (Fluke: 9F58)
0x40000-0x41FFF	8192	great_guns_psb12_ra1.rom12.8g	CRC(c6617377) (Fluke: 1517)
0x44000-0x45FFF	8192	great_guns_psb13_ra1.rom13.8f	CRC(aeab8555) (Fluke: A284)
0x48000-0x49FFF	8192	great_guns_psb14_ra1.rom14.8d	CRC(ef35e314) (Fluke: EE73)
0x4C000-0x4DFFF	8192	great_guns_psb15_ra1.rom15.8c	CRC(1fafe83d) (Fluke: 0E71)
0x50000-0x51FFF	8192	great_guns_psb16_ra1.rom16.9g	CRC(ec49864f) (Fluke: AECE)
0x54000-0x55FFF	8192	great_guns_psb17_ra1.rom17.9f	CRC(d9778e85) (Fluke: 9193)
0x58000-0x59FFF	8192	great_guns_psb18_ra1.rom18.9d	CRC(ef61b6c0) (Fluke: 3081)
0x5C000-0x5DFFF	8192	great_guns_psb19_ra1.rom19.9c	CRC(68752e0d) (Fluke: 0F49)