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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.
Sengoku Mahjong [BET] (Sigma, 1991)
Memory Area:sengokmj_io_map
Address RangeLengthFunctionDescription
0x4000-0x400F16Device Read/Writeseibu_sound, seibu_sound_device, main_word_r, main_word_w
0x8000-0x804F80Device Read/Writecrtc, seibu_crtc_device, read, write
0x8140-0x81412Writemahjong_panel_w
0x8180-0x81812Writeout_w
0xC000-0xC0012Read PortDSW
0x0001Demo_SoundsActive High
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xC002-0xC0032Readmahjong_panel_r
0xC004-0xC0052Readsystem_r (//switches)
Memory Area:sengokmj_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768RAM
0x8000-0x9FFF8192RAM, Sharednvram
0xC000-0xC7FF2048RAM Write, Sharedseibucrtc_sc0vram_w, sc0_vram
0xC800-0xCFFF2048RAM Write, Sharedseibucrtc_sc1vram_w, sc1_vram
0xD000-0xD7FF2048RAM Write, Sharedseibucrtc_sc2vram_w, sc2_vram
0xD800-0xE7FF4096RAM Write, Sharedseibucrtc_sc3vram_w, sc3_vram
0xE800-0xF7FF4096RAM Device Write, Sharedpalette, palette_device, write, palette
0xF800-0xFFFF2048RAM, Sharedsprite_ram
0xC0000-0xFFFFF262144ROM
 

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
0x0000-0x7FFF32768mah1-2-1.013CRC(6a4f31b8) (Fluke: A253)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072mah1-1-1.915CRC(d4612e95) (Fluke: F998)
Memory Area:spr_gfx
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFFF1048576rssengo2.72CRC(fb215ff8) (Fluke: 53EF)
0x0000-0xFFFFF1048576rssengo0.64CRC(36924b71) (Fluke: DF23)
0x100000-0x1FFFFF1048576rssengo1.68CRC(1bbd00e5) (Fluke: 865C)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512rs006.89CRC(96f7646e),Priority (Fluke: A3A4)
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