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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.
4nin-uchi Mahjong Jantotsu (Sanritsu, 1983)
Memory Area:jantotsu_io
Address RangeLengthFunctionDescription
0x00001Read Port, Device WriteDSW1, sn1, sn76489a_device, write
0x0001CoinageActive High
0x00001C_1CActive High
0x00011C_2CActive High
0x000030Active High
0x000850Active High
0x000470Active High
0x000c90Active High
0x0010110Active High
0x0018130Active High
0x0014150Active High
0x001c170Active High
0x0000100Active High
0x0040120Active High
0x0020140Active High
0x0060160Active High
0x0080180Active High
0x00c0200Active High
0x00a0220Active High
0x00e0240Active High
0x00011Read, Device Writejantotsu_dsw2_r, sn2, sn76489a_device, write
0x0002-0x00032Writejan_adpcm_w
0x00041Read/Writejantotsu_mux_r, jantotsu_mux_w
0x00071Writebankaddr_w
Memory Area:jantotsu_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xC000-0xC7FF2048RAM
0xE000-0xFFFF8192Read/Writejantotsu_bitmap_r, jantotsu_bitmap_w
 

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:adpcm
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192jat-43.9bCRC(3c1d843c) (Fluke: CA98)
0x4000-0x5FFF8192jat-42.8bCRC(3ac3efbf) (Fluke: FF48)
0x8000-0x9FFF8192jat-41.7bCRC(ce08ed71) (Fluke: DC73)
0xC000-0xDFFF8192jat-40.6bCRC(2275253e) (Fluke: 0616)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192jat-00.2bCRC(bed10f86) (Fluke: EA6E)
0x2000-0x3FFF8192jat-01.3bCRC(cc9312e9) (Fluke: 0B04)
0x4000-0x5FFF8192jat-02.4bCRC(292969f1) (Fluke: F59C)
0x6000-0x7FFF8192jat-03.2eCRC(7452ff63) (Fluke: 32A6)
0x8000-0x9FFF8192jat-04.3eCRC(734e029f) (Fluke: DC42)
0xA000-0xBFFF8192jat-05.4eCRC(1a725e1a) (Fluke: 4067)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32jat-60.10pCRC(65528ae0) (Fluke: 79B2)
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