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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.
Shanghai III (Sunsoft, 1993)
Memory Area:shangha3_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
0x100000-0x100FFF4096RAM Device Write, Sharedpalette, palette_device, write, palette
0x200000-0x2000012Read PortINPUTS
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x0100Joystick RightActive Low
0x0200Joystick LeftActive Low
0x0400Joystick DownActive Low
0x0800Joystick UpActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000UnknownActive Low
0x8000UnknownActive Low
0x200002-0x2000032Read PortSYSTEM
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0008Start 1Active Low
0x0010Start 2Active Low
0x0040UnknownActive Low
0x0080CustomActive Low
0x200008-0x2000092Writeblitter_go_w
0x20000A-0x20000B2Writeirq_ack_w
0x20000C-0x20000D2Writeshangha3_coinctrl_w
0x20001E-0x20001F2Device Read 8-bitaysnd, ay8910_device, data_r, 0x00ff
0x20002E-0x20002F2Device Write 8-bitaysnd, ay8910_device, data_w, 0x00ff
0x20003E-0x20003F2Device Write 8-bitaysnd, ay8910_device, address_w, 0x00ff
0x20004E-0x20004F2Read/Writeshangha3_prot_r,shangha3_prot_w
0x20006E-0x20006F2Device Read/Write 8-bitoki, okim6295_device, read, write, 0x00ff
0x300000-0x30FFFF65536RAM, Sharedram (/* gfx & work ram */)
0x340000-0x3400012Writeflipscreen_w
0x360000-0x3600012Writegfxlist_addr_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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFFF2097152s3j_char-a1.ic43CRC(2dbf9d17),42pin MASK ROM (Fluke: 2C31)
0x0000-0x1FFFFF2097152s3j_char-a1.ic43CRC(2dbf9d17),42pin MASK ROM (Fluke: 2C31)
0x0000-0x1FFFFF2097152s3j_char-a1.ic43CRC(2dbf9d17),42pin MASK ROM (Fluke: 2C31)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144s3j_v10.ic75CRC(f0cdc86a) (Fluke: 1690)
0x0000-0x3FFFF262144s3j_v10.ic75CRC(f0cdc86a) (Fluke: 1690)
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