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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: The Battle of Midway (Capcom, 1987)
Memory Area:c1943_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384ROM Bankbank1
0xC0001Read PortSYSTEM
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004UnusedActive Low
0x0008SpecialActive Low
0x0030UnusedActive Low
0x0040Coin 1Active Low
0x0080Coin 2Active Low
0xC0011Read PortP1
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x00c0UnusedActive Low
0xC0021Read PortP2
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x00c0UnusedActive Low
0xC0031Read PortDSWA
0x000fDifficultyActive High
0x000f1 (Easy)Active High
0x000e2Active High
0x000d3Active High
0x000c4Active High
0x000b5Active High
0x000a6Active High
0x00097Active High
0x00088 (Normal)Active High
0x00079Active High
0x000610Active High
0x000511Active High
0x000412Active High
0x000313Active High
0x000214Active High
0x000115Active High
0x000016 (Difficult)Active High
0x00001 Credit/2 PlayersActive High
0x00102 Credits/2 PlayersActive High
0x0020CabinetActive High
0x0020UprightActive High
0x0000CocktailActive High
0x0040OffActive High
0x0000OnActive High
0xC0041Read PortDSWB
0x0007Coin_AActive High
0x00004C_1CActive High
0x00013C_1CActive High
0x00022C_1CActive High
0x00071C_1CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00041C_4CActive High
0x00031C_5CActive High
0x0038Coin_BActive High
0x00004C_1CActive High
0x00083C_1CActive High
0x00102C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x00181C_5CActive High
0x0040Allow_ContinueActive High
0x0000NoActive High
0x0040YesActive High
0x0080Demo_SoundsActive High
0x0000OffActive High
0x0080OnActive High
0xC0071Readc1943_protection_r
0xC8001Device Writesoundlatch, generic_latch_8_device, write
0xC8041Writec1943_c804_w (// ROM bank switch, screen flip)
0xC8061Device Writewatchdog, watchdog_timer_device, reset_w
0xC8071Writec1943_protection_w
0xD000-0xD3FF1024RAM Write, Sharedc1943_videoram_w, videoram
0xD400-0xD7FF1024RAM Write, Sharedc1943_colorram_w, colorram
0xD800-0xD8012RAM, Sharedscrollx
0xD8021RAM, Sharedscrolly
0xD803-0xD8042RAM, Sharedbgscrollx
0xD8061Writec1943_d806_w (// sprites, bg1, bg2 enable)
0xD8081Write NOP(// ???)
0xD8681Write NOP(// ???)
0xD8881Write NOP(// ???)
0xD8A81Write NOP(// ???)
0xE000-0xEFFF4096RAM
0xF000-0xFFFF4096RAM, Sharedspriteram
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0xC000-0xC7FF2048RAM
0xC8001Device Readsoundlatch, generic_latch_8_device, read
0xE000-0xE0012Device Writeym1, ym2203_device, write
0xE002-0xE0032Device Writeym2, 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 RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768bm05.4kCRC(ee2bd2d7) (Fluke: ACC1)
0x0000-0x7FFF32768bm05.4kCRC(ee2bd2d7) (Fluke: ACC1)
0x0000-0x7FFF32768bm05.4kCRC(ee2bd2d7) (Fluke: ACC1)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768bm04.5hCRC(46cb9d3d),characters (Fluke: 80E1)
0x0000-0x7FFF32768bm04.5hCRC(46cb9d3d),characters (Fluke: 80E1)
0x0000-0x7FFF32768bm04.5hCRC(46cb9d3d),characters (Fluke: 80E1)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768bm15.10fCRC(6b1a0443),bg tiles (Fluke: E333)
0x0000-0x7FFF32768bm15.10fCRC(6b1a0443),bg tiles (Fluke: E333)
0x0000-0x7FFF32768bm15.10fCRC(6b1a0443),bg tiles (Fluke: E333)
0x8000-0xFFFF32768bm16.11fCRC(23c908c2) (Fluke: 3049)
0x8000-0xFFFF32768bm16.11fCRC(23c908c2) (Fluke: 3049)
0x8000-0xFFFF32768bm16.11fCRC(23c908c2) (Fluke: 3049)
0x10000-0x17FFF32768bm17.12fCRC(46bcdd07) (Fluke: 2C27)
0x10000-0x17FFF32768bm17.12fCRC(46bcdd07) (Fluke: 2C27)
0x10000-0x17FFF32768bm17.12fCRC(46bcdd07) (Fluke: 2C27)
0x18000-0x1FFFF32768bm18.14fCRC(e6ae7ba0) (Fluke: ED06)
0x18000-0x1FFFF32768bm18.14fCRC(e6ae7ba0) (Fluke: ED06)
0x18000-0x1FFFF32768bm18.14fCRC(e6ae7ba0) (Fluke: ED06)
0x20000-0x27FFF32768bm19.10jCRC(868ababc) (Fluke: 41E7)
0x20000-0x27FFF32768bm19.10jCRC(868ababc) (Fluke: 41E7)
0x20000-0x27FFF32768bm19.10jCRC(868ababc) (Fluke: 41E7)
0x28000-0x2FFFF32768bm20.11jCRC(0917e5d4) (Fluke: B9BC)
0x28000-0x2FFFF32768bm20.11jCRC(0917e5d4) (Fluke: B9BC)
0x28000-0x2FFFF32768bm20.11jCRC(0917e5d4) (Fluke: B9BC)
0x30000-0x37FFF32768bm21.12jCRC(9bfb0d89) (Fluke: E8D1)
0x30000-0x37FFF32768bm21.12jCRC(9bfb0d89) (Fluke: E8D1)
0x30000-0x37FFF32768bm21.12jCRC(9bfb0d89) (Fluke: E8D1)
0x38000-0x3FFFF32768bm22.14jCRC(04f3c274) (Fluke: 765A)
0x38000-0x3FFFF32768bm22.14jCRC(04f3c274) (Fluke: 765A)
0x38000-0x3FFFF32768bm22.14jCRC(04f3c274) (Fluke: 765A)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768bm24.14kCRC(11134036),fg tiles (Fluke: 8671)
0x0000-0x7FFF32768bm24.14kCRC(11134036),fg tiles (Fluke: 8671)
0x0000-0x7FFF32768bm24.14kCRC(11134036),fg tiles (Fluke: 8671)
0x8000-0xFFFF32768bm25.14lCRC(092cf9c1) (Fluke: 636F)
0x8000-0xFFFF32768bm25.14lCRC(092cf9c1) (Fluke: 636F)
0x8000-0xFFFF32768bm25.14lCRC(092cf9c1) (Fluke: 636F)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768bm06.10aCRC(97acc8af),sprites (Fluke: 6131)
0x0000-0x7FFF32768bm06.10aCRC(97acc8af),sprites (Fluke: 6131)
0x0000-0x7FFF32768bm06.10aCRC(97acc8af),sprites (Fluke: 6131)
0x8000-0xFFFF32768bm07.11aCRC(d78f7197) (Fluke: 47C6)
0x8000-0xFFFF32768bm07.11aCRC(d78f7197) (Fluke: 47C6)
0x8000-0xFFFF32768bm07.11aCRC(d78f7197) (Fluke: 47C6)
0x10000-0x17FFF32768bm08.12aCRC(1a626608) (Fluke: D8B4)
0x10000-0x17FFF32768bm08.12aCRC(1a626608) (Fluke: D8B4)
0x10000-0x17FFF32768bm08.12aCRC(1a626608) (Fluke: D8B4)
0x18000-0x1FFFF32768bm09.14aCRC(92408400) (Fluke: 447E)
0x18000-0x1FFFF32768bm09.14aCRC(92408400) (Fluke: 447E)
0x18000-0x1FFFF32768bm09.14aCRC(92408400) (Fluke: 447E)
0x20000-0x27FFF32768bm10.10cCRC(8438a44a) (Fluke: BBDB)
0x20000-0x27FFF32768bm10.10cCRC(8438a44a) (Fluke: BBDB)
0x20000-0x27FFF32768bm10.10cCRC(8438a44a) (Fluke: BBDB)
0x28000-0x2FFFF32768bm11.11cCRC(6c69351d) (Fluke: FCB6)
0x28000-0x2FFFF32768bm11.11cCRC(6c69351d) (Fluke: FCB6)
0x28000-0x2FFFF32768bm11.11cCRC(6c69351d) (Fluke: FCB6)
0x30000-0x37FFF32768bm12.12cCRC(5e7efdb7) (Fluke: F41D)
0x30000-0x37FFF32768bm12.12cCRC(5e7efdb7) (Fluke: F41D)
0x30000-0x37FFF32768bm12.12cCRC(5e7efdb7) (Fluke: F41D)
0x38000-0x3FFFF32768bm13.14cCRC(1143829a) (Fluke: DE14)
0x38000-0x3FFFF32768bm13.14cCRC(1143829a) (Fluke: DE14)
0x38000-0x3FFFF32768bm13.14cCRC(1143829a) (Fluke: DE14)
Memory Area:gfx5
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768bm14.5fCRC(4d3c6401),front background (Fluke: A309)
0x0000-0x7FFF32768bm14.5fCRC(4d3c6401),front background (Fluke: A309)
0x0000-0x7FFF32768bm14.5fCRC(4d3c6401),front background (Fluke: A309)
0x8000-0xFFFF32768bm23.8kCRC(a52aecbd),back background (Fluke: 4181)
0x8000-0xFFFF32768bm23.8kCRC(a52aecbd),back background (Fluke: 4181)
0x8000-0xFFFF32768bm23.8kCRC(a52aecbd),back background (Fluke: 4181)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x10000-0x1FFFF65536bme02.13dCRC(073fc57c)
0x20000-0x2FFFF65536bme03.14dCRC(835822c2),These 3 roms have a BLUE stripe on them
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536bm.7kcan't be dumped
0x0000-0xFFFF65536bm.7kcan't be dumped
0x0000-0xFFFF65536bm.7kcan't be dumped
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256bm1.12aCRC(74421f18),red component (Fluke: E692)
0x0000-0x00FF256bm1.12aCRC(74421f18),red component (Fluke: E692)
0x0000-0x00FF256bm1.12aCRC(74421f18),red component (Fluke: E692)
0x0100-0x01FF256bm2.13aCRC(ac27541f),green component (Fluke: 45D1)
0x0100-0x01FF256bm2.13aCRC(ac27541f),green component (Fluke: 45D1)
0x0100-0x01FF256bm2.13aCRC(ac27541f),green component (Fluke: 45D1)
0x0200-0x02FF256bm3.14aCRC(251fb6ff),blue component (Fluke: 543A)
0x0200-0x02FF256bm3.14aCRC(251fb6ff),blue component (Fluke: 543A)
0x0200-0x02FF256bm3.14aCRC(251fb6ff),blue component (Fluke: 543A)
0x0300-0x03FF256bm5.7fCRC(206713d0),char lookup table (Fluke: 823E)
0x0300-0x03FF256bm5.7fCRC(206713d0),char lookup table (Fluke: 823E)
0x0300-0x03FF256bm5.7fCRC(206713d0),char lookup table (Fluke: 823E)
0x0400-0x04FF256bm10.7lCRC(33c2491c),foreground lookup table (Fluke: 7A9A)
0x0400-0x04FF256bm10.7lCRC(33c2491c),foreground lookup table (Fluke: 7A9A)
0x0400-0x04FF256bm10.7lCRC(33c2491c),foreground lookup table (Fluke: 7A9A)
0x0500-0x05FF256bm9.6lCRC(aeea4af7),foreground palette bank (Fluke: 5C61)
0x0500-0x05FF256bm9.6lCRC(aeea4af7),foreground palette bank (Fluke: 5C61)
0x0500-0x05FF256bm9.6lCRC(aeea4af7),foreground palette bank (Fluke: 5C61)
0x0600-0x06FF256bm12.12mCRC(c18aa136),background lookup table (Fluke: EC15)
0x0600-0x06FF256bm12.12mCRC(c18aa136),background lookup table (Fluke: EC15)
0x0600-0x06FF256bm12.12mCRC(c18aa136),background lookup table (Fluke: EC15)
0x0700-0x07FF256bm11.12lCRC(405aae37),background palette bank (Fluke: FFA1)
0x0700-0x07FF256bm11.12lCRC(405aae37),background palette bank (Fluke: FFA1)
0x0700-0x07FF256bm11.12lCRC(405aae37),background palette bank (Fluke: FFA1)
0x0800-0x08FF256bm8.8cCRC(c2010a9e),sprite lookup table (Fluke: E56A)
0x0800-0x08FF256bm8.8cCRC(c2010a9e),sprite lookup table (Fluke: E56A)
0x0800-0x08FF256bm8.8cCRC(c2010a9e),sprite lookup table (Fluke: E56A)
0x0900-0x09FF256bm7.7cCRC(b56f30c3),sprite palette bank (Fluke: 0298)
0x0900-0x09FF256bm7.7cCRC(b56f30c3),sprite palette bank (Fluke: 0298)
0x0900-0x09FF256bm7.7cCRC(b56f30c3),sprite palette bank (Fluke: 0298)
0x0A00-0x0AFF256bm4.12cCRC(91a8a2e1),priority encoder / palette selector (not used) (Fluke: B848)
0x0A00-0x0AFF256bm4.12cCRC(91a8a2e1),priority encoder / palette selector (not used) (Fluke: B848)
0x0A00-0x0AFF256bm4.12cCRC(91a8a2e1),priority encoder / palette selector (not used) (Fluke: B848)
0x0B00-0x0BFF256bm6.4bCRC(0eaf5158),video timing (not used) (Fluke: E9D9)
0x0B00-0x0BFF256bm6.4bCRC(0eaf5158),video timing (not used) (Fluke: E9D9)
0x0B00-0x0BFF256bm6.4bCRC(0eaf5158),video timing (not used) (Fluke: E9D9)
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