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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.
Express Raider (Data East Corporation, 1986)
Memory Area:master_io_map
Address RangeLengthFunctionDescription
0x00011Read PortIN0
0x0002CustomActive High
Memory Area:master_map
Address RangeLengthFunctionDescription
0x0000-0x05FF1536RAM, Sharedmain_ram
0x0600-0x07FF512RAM, Sharedspriteram
0x0800-0x0BFF1024RAM Write, Sharedexprraid_videoram_w, videoram
0x0C00-0x0FFF1024RAM Write, Sharedexprraid_colorram_w, colorram
0x18001Read PortDSW0 (/* DSW 0 */)
0x0003Coin_AActive High
0x00002C_1CActive High
0x00031C_1CActive High
0x00021C_2CActive High
0x00031C_2CActive High
0x00011C_3CActive High
0x00021C_3CActive High
0x00011C_4CActive High
0x00001C_6CActive High
0x000cCoin_BActive High
0x00004C_1CActive High
0x00043C_1CActive High
0x00002C_1CActive High
0x00082C_1CActive High
0x000c1C_1CActive High
0x000c1C_1CActive High
0x00081C_2CActive High
0x00041C_3CActive High
0x0010Mode 1Active High
0x0000Mode 2Active High
0x0020Flip_ScreenActive High
0x0020OffActive High
0x0000OnActive High
0x0040CabinetActive High
0x0000UprightActive High
0x0040CocktailActive High
0x18011Read PortIN1 (/* Controls */)
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040Start 1Active Low
0x0080Start 2Active Low
0x18021Read PortIN2 (/* Coins */)
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040Coin 1Active Low
0x0080Coin 2Active Low
0x18031Read PortDSW1 (/* DSW 1 */)
0x0003LivesActive High
0x00011Active High
0x00033Active High
0x00025Active High
0x0000InfiniteActive High
0x0004Bonus_LifeActive High
0x000050k 80kActive High
0x000450k onlyActive High
0x0018DifficultyActive High
0x0018EasyActive High
0x0010NormalActive High
0x0008HardActive High
0x0000Very_HardActive High
0x0020Demo_SoundsActive High
0x0000OffActive High
0x0020OnActive High
0x0040Service 1Active Low
0x20001Writeexprraid_int_clear_w
0x20011Writesound_cpu_command_w
0x20021Writeexprraid_flipscreen_w
0x20031Write NOP(// DMA SWAP - Allow writes to video and sprite RAM)
0x28001Readexprraid_prot_data_r
0x2800-0x28034Writeexprraid_bgselect_w
0x28011Readexprraid_prot_status_r
0x28041Writeexprraid_scrolly_w
0x2805-0x28062Writeexprraid_scrollx_w
0x28071Writeexprraid_prot_data_w
0x4000-0xFFFF49152ROM
Memory Area:slave_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192RAM
0x2000-0x20012Device Read/Writeym1, ym2203_device, read, write
0x4000-0x40012Device Read/Writeym2, ym3526_device, read, write
0x60001Readsound_cpu_command_r
0x8000-0xFFFF32768ROM
 

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 RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384cz07.5bCRC(686bac23),characters (Fluke: 22D6)
0x0000-0x3FFF16384cz07.5bCRC(686bac23),characters (Fluke: 22D6)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768cz09.16hCRC(1ed250d1),sprites (Fluke: A09A)
0x0000-0x7FFF32768cz09.16hCRC(1ed250d1),sprites (Fluke: A09A)
0x8000-0xFFFF32768cz08.14hCRC(2293fc61) (Fluke: A3A0)
0x8000-0xFFFF32768cz08.14hCRC(2293fc61) (Fluke: A3A0)
0x10000-0x17FFF32768cz13.16kCRC(7c3bfd00) (Fluke: 1A7B)
0x10000-0x17FFF32768cz13.16kCRC(7c3bfd00) (Fluke: 1A7B)
0x18000-0x1FFFF32768cz12.14kCRC(ea2294c8) (Fluke: C59E)
0x18000-0x1FFFF32768cz12.14kCRC(ea2294c8) (Fluke: C59E)
0x20000-0x27FFF32768cz11.13kCRC(b7418335) (Fluke: DD99)
0x20000-0x27FFF32768cz11.13kCRC(b7418335) (Fluke: DD99)
0x28000-0x2FFFF32768cz10.11kCRC(2f611978) (Fluke: D811)
0x28000-0x2FFFF32768cz10.11kCRC(2f611978) (Fluke: D811)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768cz04.8eCRC(643a1bd3),tiles (Fluke: 1077)
0x0000-0x7FFF32768cz04.8eCRC(643a1bd3),tiles (Fluke: 1077)
0x10000-0x17FFF32768cz05.8fCRC(c44570bf),tiles (Fluke: 65C8)
0x10000-0x17FFF32768cz05.8fCRC(c44570bf),tiles (Fluke: 65C8)
0x18000-0x1FFFF32768cz06.8hCRC(b9bb448b),tiles (Fluke: 4F40)
0x18000-0x1FFFF32768cz06.8hCRC(b9bb448b),tiles (Fluke: 4F40)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768cz03.12dCRC(6ce11971) (Fluke: 857F)
0x0000-0x7FFF32768cz03.12dCRC(6ce11971) (Fluke: 857F)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x4000-0x7FFF16384cz01-2e.16bCRC(a0ae6756) (Fluke: E6F7)
0x4000-0x7FFF16384cz01-2e.16bCRC(a0ae6756) (Fluke: E6F7)
0x8000-0xFFFF32768cz00-4e.15aCRC(910f6ccc) (Fluke: 5F91)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x0103260pal16r4a.5cCRC(d66aaa87) (Fluke: 1A5D)
0x0000-0x0103260pal16r4a.5cCRC(d66aaa87) (Fluke: 1A5D)
0x0200-0x0303260pal16r4a.5eCRC(9a8766a7) (Fluke: 592B)
0x0200-0x0303260pal16r4a.5eCRC(9a8766a7) (Fluke: 592B)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256cy-17.5bCRC(da31dfbc),red (Fluke: 366C)
0x0000-0x00FF256cy-17.5bCRC(da31dfbc),red (Fluke: 366C)
0x0100-0x01FF256cy-16.6bCRC(51f25b4c),green (Fluke: 7846)
0x0100-0x01FF256cy-16.6bCRC(51f25b4c),green (Fluke: 7846)
0x0200-0x02FF256cy-15.7bCRC(a6168d7f),blue (Fluke: 50DA)
0x0200-0x02FF256cy-15.7bCRC(a6168d7f),blue (Fluke: 50DA)
0x0300-0x03FF256cy-14.9bCRC(52aad300),??? (Fluke: 960C)
0x0300-0x03FF256cy-14.9bCRC(52aad300),??? (Fluke: 960C)
Memory Area:slave
Address RangeLengthLabel/LocationDescription
0x8000-0xFFFF32768cz02-1.2aCRC(552e6112) (Fluke: EC25)
0x8000-0xFFFF32768cz02-1.2aCRC(552e6112) (Fluke: EC25)
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