Games V18.7C 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.

Games V18.7C (U.S. Games, 1991)

Memory Area:usg185_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	RAM, Shared	nvram
0x2000-0x2001	2	Device Write	aysnd, ay8910_device, address_data_w
0x2400	1	Read Port	DSW
0x2410	1	Read Port	INPUTS
0x2420	1	Write	lamps1_w
0x2430	1	Write	lamps2_w
0x2440	1	Device Write	crtc, mc6845_device, address_w
0x2441	1	Read Port	UNK1
0x2441	1	Device Write	crtc, mc6845_device, register_w
0x2460	1	Write	rombank_w
0x2470	1	Read Port	UNK2
0x2800-0x2FFF	2048	RAM Write, Shared	charram_w, charram
0x3000-0x3FFF	4096	RAM Write, Shared	videoram_w, videoram
0x4000-0x7FFF	16384	ROM Bank	bank1
0x8000-0xFFFF	32768	ROM

Memory Area:usgames_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	RAM, Shared	nvram
0x2000	1	Read Port	DSW
0x2010	1	Read Port	INPUTS
0x2020	1	Write	lamps1_w
0x2030	1	Write	lamps2_w
0x2040	1	Device Write	crtc, mc6845_device, address_w
0x2041	1	Read Port	UNK1
0x2041	1	Device Write	crtc, mc6845_device, register_w
0x2060	1	Write	rombank_w
0x2070	1	Read Port	UNK2
0x2400-0x2401	2	Device Write	aysnd, ay8910_device, address_data_w
0x2800-0x2FFF	2048	RAM Write, Shared	charram_w, charram
0x3000-0x3FFF	4096	RAM Write, Shared	videoram_w, videoram
0x4000-0x7FFF	16384	ROM Bank	bank1
0x8000-0xFFFF	32768	ROM

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
0x8000-0xFFFF	32768	version_18.7c_rom0_cs=30a6ba.u12	CRC(2f4ed125) (Fluke: E802)
0x10000-0x1FFFF	65536	version_18.7c_rom4_cs=90b95e.u36	CRC(b104744d) (Fluke: 61C6)
0x20000-0x2FFFF	65536	version_18.7c_rom3_cs=76aebf.u35	CRC(795e71c8) (Fluke: FCAD)
0x30000-0x3FFFF	65536	version_18.7c_rom2_cs=8973c0.u28	CRC(c6ba8a81) (Fluke: 6561)
0x40000-0x4FFFF	65536	version_18.7c_rom1_cs=6dcfd3.u18	CRC(1cfd934d) (Fluke: BD18)