Galaxian 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.

Galaxian (Namco (Midway license), 1979)

Memory Area:galaxian_map_base

Address Range	Length	Function	Description
0x0000-0x3FFF	16384	ROM
0x4000-0x43FF	1024	Mirror, RAM	0x0400,
0x5000-0x53FF	1024	Mirror, RAM Write, Shared	0x0400, galaxian_videoram_w, videoram
0x5800-0x58FF	256	Mirror, RAM Write, Shared	0x0700, galaxian_objram_w, spriteram
0x6000	1	Mirror, Read Port	0x07ff, IN0
0x6000-0x6001	2	Mirror, Write	0x07f8, start_lamp_w
0x6002	1	Mirror, Write	0x07f8, coin_lock_w
0x6003	1	Mirror, Write	0x07f8, coin_count_0_w
0x6800	1	Mirror, Read Port	0x07ff, IN1
0x7000	1	Mirror, Read Port	0x07ff, IN2
0x7001	1	Mirror, Write	0x07f8, irq_enable_w
0x7004	1	Mirror, Write	0x07f8, galaxian_stars_enable_w
0x7006	1	Mirror, Write	0x07f8, galaxian_flip_screen_x_w
0x7007	1	Mirror, Write	0x07f8, galaxian_flip_screen_y_w
0x7800	1	Mirror, Device Read	0x07ff, watchdog, watchdog_timer_device, reset_r

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:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	galaxian.j1	CRC(84decf98) (Fluke: 19B7)
0x0000-0x07FF	2048	galaxian.j1	CRC(84decf98) (Fluke: 19B7)
0x0800-0x0FFF	2048	galaxian.l1	CRC(c31ada9e) (Fluke: E088)
0x0800-0x0FFF	2048	galaxian.l1	CRC(c31ada9e) (Fluke: E088)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	galmidw.u	CRC(745e2d61) (Fluke: FFDE)
0x0800-0x0FFF	2048	galmidw.v	CRC(9c999a40) (Fluke: 4055)
0x1000-0x17FF	2048	galmidw.w	CRC(b5894925) (Fluke: FCD2)
0x1800-0x1FFF	2048	galmidw.y	CRC(6b3ca10b) (Fluke: 317B)
0x2000-0x27FF	2048	galmidw.z	CRC(cb24f797) (Fluke: EC3A)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x001F	32	6l.bpr	CRC(c3ac9467) (Fluke: C471)
0x0000-0x001F	32	6l.bpr	CRC(c3ac9467) (Fluke: C471)