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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, 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
0x0744-0x07452Read PortP1_P2
0x074C-0x074D2Read PortSYSTEM
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
0x401A1Device Writeseibu_sound, seibu_sound_device, bank_w
0x401A1Read/Write NOP
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
0x0000-0x7FFF32768seibu_5.u1110CRC(c2028ba2) (Fluke: DE84)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072seibu_7.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)
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)
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
0x0000-0x3FFFF262144seibu_6.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)
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
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
0x0000-0x0334821jj4b01__mmipal16l8bcn.u0341.jedCRC(d1a039af)
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
0x0000-0x0287648jj4b02__ami18cv8-15.u0342.jed
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)
0x0000-0x0334821jj4b01__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)
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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