Stargate 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.

Stargate (Williams / Vid Kidz, 1981)

Memory Area:sound_map

Address Range	Length	Function	Description
0x0000-0x007F	128	RAM	(/* internal RAM */)
0x0080-0x00FF	128	RAM	(/* MC6810 RAM */)
0x0400-0x0403	4	Mirror, Device Read/Write	0x8000, pia_2, pia6821_device, read, write
0xB000-0xFFFF	20480	ROM

Memory Area:williams_map

Address Range	Length	Function	Description
0x0000-0x8FFF	36864	Read Bank, Write Only, Shared	bank1, , videoram
0x9000-0xBFFF	12288	RAM
0xC000-0xC00F	16	Mirror, Write Only, Shared	0x03f0, , paletteram
0xC804-0xC807	4	Mirror, Device Read/Write	0x00f0, pia_0, pia6821_device, read, write
0xC80C-0xC80F	4	Mirror, Device Read/Write	0x00f0, pia_1, pia6821_device, read, write
0xC900-0xC9FF	256	Write	williams_vram_select_w
0xCA00-0xCA07	8	Mirror, Write	0x00f8, williams_blitter_w
0xCB00-0xCBFF	256	Read	williams_video_counter_r
0xCBFF	1	Write	williams_watchdog_reset_w
0xCC00-0xCFFF	1024	RAM Write, Shared	williams_cmos_w, nvram
0xD000-0xFFFF	12288	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
0xD000-0xDFFF	4096	10	CRC(60b07ff7) (Fluke: 01B8)
0xE000-0xEFFF	4096	11	CRC(7d2c5daf) (Fluke: DD00)
0xF000-0xFFFF	4096	12	CRC(a0396670) (Fluke: 0FBD)
0x10000-0x10FFF	4096	01	CRC(88824d18) (Fluke: 4791)
0x11000-0x11FFF	4096	02	CRC(afc614c5) (Fluke: F15E)
0x12000-0x12FFF	4096	03	CRC(15077a9d) (Fluke: DAE2)
0x13000-0x13FFF	4096	04	CRC(a8b4bf0f) (Fluke: 120A)
0x14000-0x14FFF	4096	05	CRC(2d306074) (Fluke: 44C6)
0x15000-0x15FFF	4096	06	CRC(53598dde) (Fluke: B818)
0x16000-0x16FFF	4096	07	CRC(23606060) (Fluke: AF88)
0x17000-0x17FFF	4096	08	CRC(4ec490c7) (Fluke: C0ED)
0x18000-0x18FFF	4096	09	CRC(88187b64) (Fluke: 2BD5)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x01FF	512	decoder.4	CRC(e6631c23) (Fluke: 5702)
0x0200-0x03FF	512	decoder.5	CRC(f921c5fe) (Fluke: E579)

Memory Area:soundcpu

Address Range	Length	Label/Location	Description
0xF800-0xFFFF	2048	sg.snd	CRC(2fcf6c4d) (Fluke: 6D7F)