Dodge City 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.

Dodge City (Merit, 1986)

Memory Area:dodge_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0xA000-0xBFFF	8192	RAM, Shared	nvram
0xC004-0xC007	4	Device Read/Write	ppi8255_0, i8255_device, read, write
0xC008-0xC00B	4	Device Read/Write	ppi8255_1, i8255_device, read, write
0xE000	1	Device Write	crtc, mc6845_device, address_w
0xE001	1	Device Write	crtc, mc6845_device, register_w
0xE800-0xEFFF	2048	RAM, Shared	raattr
0xF000-0xF7FF	2048	RAM, Shared	ravideo
0xF800-0xFBFF	1024	Read/Write	palette_r, palette_w

Memory Area:pitboss_map

Address Range	Length	Function	Description
0x0000-0x5FFF	24576	ROM
0x6000-0x67FF	2048	RAM
0xA000-0xA003	4	Device Read/Write	ppi8255_0, i8255_device, read, write
0xC000-0xC003	4	Device Read/Write	ppi8255_1, i8255_device, read, write
0xE000	1	Device Write	crtc, mc6845_device, address_w
0xE001	1	Device Write	crtc, mc6845_device, register_w
0xE800-0xEFFF	2048	RAM, Shared	raattr
0xF000-0xF7FF	2048	RAM, Shared	ravideo
0xF800-0xFBFF	1024	Read/Write	palette_r, palette_w

Memory Area:tictac_io_map

Address Range	Length	Function	Description
0xC00C	1	Mirror, Device Write	0x1cf3, aysnd, ay8910_device, address_w
0xC10C	1	Mirror, Device Write	0x1cf3, aysnd, ay8910_device, data_w

Memory Area:trvwhiz_io_map

Address Range	Length	Function	Description
0x8000	1	Device Write	aysnd, ay8910_device, address_w
0x8100	1	Device Write	aysnd, ay8910_device, data_w

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:crt209

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	crt-209_2131-82	2816 EEPROM in Z80 epoxy CPU module

Memory Area:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	dodg_u39.u39	CRC(3b3376a1),These 3 roms: 1st & 2nd half identical - Verified correct
0x8000-0xFFFF	32768	dodg_u38.u38	CRC(654d5b00)
0x10000-0x17FFF	32768	dodg_u37.u37	CRC(bc9e63d4)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	2131-82_u5-0d.u5	CRC(ef71b268),2131-82 U5-0D 884111 2131 820