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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.
Raiden II (Seibu Kaihatsu (Fabtek license), 1993)
Memory Area:raiden2_mem
Address RangeLengthFunctionDescription
0x0000-0x03FF1024RAM
0x068E-0x068F2Write NOP(//irq ack / sprite buffering?)
0x0700-0x071F32Read/Writeraiden2_sound_comms_r,raiden2_sound_comms_w
0x0740-0x07412Read PortDSW
0x0007Coin_AActive High
0x00014C_1CActive High
0x00023C_1CActive High
0x00042C_1CActive High
0x00071C_1CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00031C_4CActive High
0x0000Free_PlayActive High
0x0038Coin_BActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00202C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00181C_4CActive High
0x0000Free_PlayActive High
0x0040NormalActive High
0x0000X 2Active High
0x0080Flip_ScreenActive High
0x0080OffActive High
0x0000OnActive High
0x0300DifficultyActive High
0x0300NormalActive High
0x0200EasyActive High
0x0100HardActive High
0x0000Very_HardActive High
0x0c00LivesActive High
0x00001Active High
0x04004Active High
0x08002Active High
0x0c003Active High
0x3000Bonus_LifeActive High
0x3000200000 500000Active High
0x2000400000 1000000Active High
0x10001000000 3000000Active High
0x0000No ExtendActive High
0x0000OffActive High
0x4000OnActive High
0x0744-0x07452Read PortP1_P2
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnusedActive Low
0x0080UnusedActive Low
0x0100Joystick UpActive Low
0x0200Joystick DownActive Low
0x0400Joystick LeftActive Low
0x0800Joystick RightActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000UnusedActive Low
0x8000UnusedActive Low
0x074C-0x074D2Read PortSYSTEM
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004UnusedActive Low
0x0008Service 1Active Low
0xfff0UnusedActive Low
0x0800-0xBFFF47104RAM
0xC000-0xCFFF4096RAM, Sharedsprites
0xD000-0xD7FF2048RAM(// _WRITE(raiden2_background_w) AM_SHARE("back_data"))
0xD800-0xDFFF2048RAM(// _WRITE(raiden2_foreground_w) AM_SHARE("fore_data"))
0xE000-0xE7FF2048RAM(// _WRITE(raiden2_midground_w) AM_SHARE("mid_data"))
0xE800-0xF7FF4096RAM(// _WRITE(raiden2_text_w) AM_SHARE("text_data"))
0xF800-0xFFFF2048RAM(/* Stack area */)
0x10000-0x1EFFF61440RAM
0x1F000-0x1FFFF4096RAM(//_DEVWRITE("palette", palette_device, write) AM_SHARE("palette"))
0x20000-0x2FFFF65536ROM Bankmainbank1
0x30000-0x3FFFF65536ROM Bankmainbank2
0x40000-0xFFFFF786432ROM, Regionmaincpu, 0x40000
Memory Area:raiden2_sound_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x2000-0x27FF2048RAM
0x40001Device Writeseibu_sound, seibu_sound_device, pending_w
0x40011Device Writeseibu_sound, seibu_sound_device, irq_clear_w
0x40021Device Writeseibu_sound, seibu_sound_device, rst10_ack_w
0x40031Device Writeseibu_sound, seibu_sound_device, rst18_ack_w
0x40041Read/Write NOP
0x4008-0x40092Device Read/Writeseibu_sound, seibu_sound_device, ym_r, ym_w
0x4010-0x40112Device Readseibu_sound, seibu_sound_device, soundlatch_r
0x40121Device Readseibu_sound, seibu_sound_device, main_data_pending_r
0x40131Read PortCOIN
0x4018-0x40192Device Writeseibu_sound, seibu_sound_device, main_data_w
0x401A1Read/Write NOP
0x401A1Device Writeseibu_sound, seibu_sound_device, bank_w
0x401B1Device Writeseibu_sound, seibu_sound_device, coin_w
0x60001Device Read/Writeoki1, okim6295_device, read, write
0x60021Device Read/Writeoki2, okim6295_device, read, write
0x8000-0xFFFF32768ROM Bankseibu_bank1
 

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
0x0000-0x7FFF32768snd.u1110CRC(f51a28f9) (Fluke: DCBE)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072seibu7.u0724CRC(c9ec9469),PCB silkscreened FX0 (Fluke: 61D4)
0x0000-0x1FFFF131072seibu7.u0724CRC(c9ec9469),PCB silkscreened FX0 (Fluke: A77E)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFFF2097152raiden_2_seibu_bg-1.u0714CRC(e61ad38e),Soldered MASK ROM (Fluke: 6D8B)
0x0000-0x1FFFFF2097152raiden_2_seibu_bg-1.u0714CRC(e61ad38e),Soldered MASK ROM (Fluke: 6D8B)
0x0000-0x1FFFFF2097152raiden_2_seibu_bg-1.u0714CRC(e61ad38e),Soldered MASK ROM (Fluke: 6D8B)
0x0000-0x1FFFFF2097152raiden_2_seibu_bg-1.u0714CRC(e61ad38e),Soldered MASK ROM (Fluke: 6D8B)
0x200000-0x3FFFFF2097152raiden_2_seibu_bg-2.u075CRC(a694a4bb),Soldered MASK ROM (Fluke: 3D2C)
0x200000-0x3FFFFF2097152raiden_2_seibu_bg-2.u075CRC(a694a4bb),Soldered MASK ROM (Fluke: 3D2C)
0x200000-0x3FFFFF2097152raiden_2_seibu_bg-2.u075CRC(a694a4bb),Soldered MASK ROM (Fluke: 3D2C)
0x200000-0x3FFFFF2097152raiden_2_seibu_bg-2.u075CRC(a694a4bb),Soldered MASK ROM (Fluke: 3D2C)
Memory Area:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144seibu6.u1017CRC(fb0fca23),PCB silkscreened VOICE1 (Fluke: 8A18)
0x0000-0x3FFFF262144seibu6.u1017CRC(fb0fca23),PCB silkscreened VOICE1 (Fluke: AD4C)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144raiden_2_pcm.u1018CRC(8cf0d17e),Soldered MASK ROM (Fluke: AB80)
0x0000-0x3FFFF262144raiden_2_pcm.u1018CRC(8cf0d17e),Soldered MASK ROM (Fluke: AB80)
0x0000-0x3FFFF262144raiden_2_pcm.u1018CRC(8cf0d17e),Soldered MASK ROM (Fluke: AB80)
0x0000-0x3FFFF262144raiden_2_pcm.u1018CRC(8cf0d17e),Soldered MASK ROM (Fluke: AB80)
Memory Area:pals
Address RangeLengthLabel/LocationDescription
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
Memory Area:user2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144copx-d2.u0313CRC(a6732ff9),Soldered MASK ROM (Fluke: A883)
0x0000-0x3FFFF262144copx-d2.u0313CRC(a6732ff9),Soldered MASK ROM (Fluke: A883)
0x0000-0x3FFFF262144copx-d2.u0313CRC(a6732ff9),Soldered MASK ROM (Fluke: A883)
0x0000-0x3FFFF262144copx-d2.u0313CRC(a6732ff9),Soldered MASK ROM (Fluke: A883)
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