1943: Battle of Midway 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.

1943: Battle of Midway (bootleg, 1987)

Memory Area:c1943_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0x8000-0xBFFF	16384	ROM Bank	bank1
0xC000	1	Read Port	SYSTEM
0xC001	1	Read Port	P1
0xC002	1	Read Port	P2
0xC003	1	Read Port	DSWA
0xC004	1	Read Port	DSWB
0xC007	1	Read	c1943_protection_r
0xC800	1	Device Write	soundlatch, generic_latch_8_device, write
0xC804	1	Write	c1943_c804_w (// ROM bank switch, screen flip)
0xC806	1	Device Write	watchdog, watchdog_timer_device, reset_w
0xC807	1	Write	c1943_protection_w
0xD000-0xD3FF	1024	RAM Write, Shared	c1943_videoram_w, videoram
0xD400-0xD7FF	1024	RAM Write, Shared	c1943_colorram_w, colorram
0xD800-0xD801	2	RAM, Shared	scrollx
0xD802	1	RAM, Shared	scrolly
0xD803-0xD804	2	RAM, Shared	bgscrollx
0xD806	1	Write	c1943_d806_w (// sprites, bg1, bg2 enable)
0xD808	1	Write NOP	(// ???)
0xD868	1	Write NOP	(// ???)
0xD888	1	Write NOP	(// ???)
0xD8A8	1	Write NOP	(// ???)
0xE000-0xEFFF	4096	RAM
0xF000-0xFFFF	4096	RAM, Shared	spriteram

Memory Area:sound_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0xC000-0xC7FF	2048	RAM
0xC800	1	Device Read	soundlatch, generic_latch_8_device, read
0xE000-0xE001	2	Device Write	ym1, ym2203_device, write
0xE002-0xE003	2	Device Write	ym2, ym2203_device, write

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:audiocpu

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	bm05.4k	CRC(ee2bd2d7) (Fluke: ACC1)

Memory Area:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	4.5h	CRC(0aba2096),characters
0x0000-0xFFFF	65536	15.12f	CRC(622b4fba),bg tiles
0x10000-0x1FFFF	65536	16.14f	CRC(25471a8d)
0x20000-0x2FFFF	65536	17.12j	CRC(9da79653)
0x30000-0x3FFFF	65536	18.14j	CRC(1f3aced8)

Memory Area:gfx3

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	bm24.14k	CRC(11134036),fg tiles (Fluke: 8671)
0x8000-0xFFFF	32768	bm25.14l	CRC(092cf9c1) (Fluke: 636F)

Memory Area:gfx4

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	bm06.10a	CRC(97acc8af),sprites (Fluke: 6131)
0x8000-0xFFFF	32768	bm07.11a	CRC(d78f7197) (Fluke: 47C6)
0x10000-0x17FFF	32768	bm08.12a	CRC(1a626608) (Fluke: D8B4)
0x18000-0x1FFFF	32768	bm09.14a	CRC(92408400) (Fluke: 447E)
0x20000-0x27FFF	32768	bm10.10c	CRC(8438a44a) (Fluke: BBDB)
0x28000-0x2FFFF	32768	bm11.11c	CRC(6c69351d) (Fluke: FCB6)
0x30000-0x37FFF	32768	bm12.12c	CRC(5e7efdb7) (Fluke: F41D)
0x38000-0x3FFFF	32768	bm13.14c	CRC(1143829a) (Fluke: DE14)

Memory Area:gfx5

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	bm14.5f	CRC(4d3c6401),front background (Fluke: A309)
0x8000-0xFFFF	32768	bm23.8k	CRC(a52aecbd),back background (Fluke: 4181)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x10000-0x1FFFF	65536	bm02.13d	CRC(af971575) (Fluke: 869E)
0x20000-0x2FFFF	65536	bm03.14d	CRC(300ec713) (Fluke: 61FD)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	bm1.12a	CRC(74421f18),red component (Fluke: E692)
0x0100-0x01FF	256	bm2.13a	CRC(ac27541f),green component (Fluke: 45D1)
0x0200-0x02FF	256	bm3.14a	CRC(251fb6ff),blue component (Fluke: 543A)
0x0300-0x03FF	256	bm5.7f	CRC(206713d0),char lookup table (Fluke: 823E)
0x0400-0x04FF	256	bm10.7l	CRC(33c2491c),foreground lookup table (Fluke: 7A9A)
0x0500-0x05FF	256	bm9.6l	CRC(aeea4af7),foreground palette bank (Fluke: 5C61)
0x0600-0x06FF	256	bm12.12m	CRC(c18aa136),background lookup table (Fluke: EC15)
0x0700-0x07FF	256	bm11.12l	CRC(405aae37),background palette bank (Fluke: FFA1)
0x0800-0x08FF	256	bm8.8c	CRC(c2010a9e),sprite lookup table (Fluke: E56A)
0x0900-0x09FF	256	bm7.7c	CRC(b56f30c3),sprite palette bank (Fluke: 0298)
0x0A00-0x0AFF	256	bm4.12c	CRC(91a8a2e1),priority encoder / palette selector (not used) (Fluke: B848)
0x0B00-0x0BFF	256	bm6.4b	CRC(0eaf5158),video timing (not used) (Fluke: E9D9)