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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.
Mahjong Cafe Time (Dynax, 1992)
Memory Area:cafetime_iomap
Address RangeLengthFunctionDescription
0x00001Writecafetime_p4_w
0x00001Writecafetime_p3_w
Memory Area:cafetime_map
Address RangeLengthFunctionDescription
0x0000-0x5FFF24576ROM
0x6000-0x7EFF7936RAM, Sharednvram
0x7FC11Device Readaysnd, ay8910_device, data_r
0x7FC2-0x7FC32Device Writeaysnd, ay8910_device, data_address_w
0x7FD01Writejanptr96_coin_counter_w
0x7FD11Read Port, Write NOPSYSTEM,
0x7FD31Writeinput_port_select_w
0x7FE01Readcafetime_dsw_r
0x7FE11Writecafetime_dsw_w
0x7FE21Writemjderngr_palbank_w
0x7FE31Writecafetime_7fe3_w
0x7FE41Readcafetime_7fe4_r
0x7FF0-0x7FFF16Device Read/Writertc, msm6242_device, read, write
0x8000-0xFFFF32768ROM Bankbank1
0x8000-0xFFFF32768Write Only, Sharedvideoram
Memory Area:dondenmj_iomap
Address RangeLengthFunctionDescription
0x00011Device Readaysnd, ay8910_device, data_r
0x0002-0x00032Device Writeaysnd, ay8910_device, data_address_w
0x00101Read Port, WriteDSW1, royalmah_palbank_w
0x000f96%Active High
0x000e93%Active High
0x000d90%Active High
0x000c87%Active High
0x000b84%Active High
0x000a81%Active High
0x000978%Active High
0x000875%Active High
0x000771%Active High
0x000668%Active High
0x000565%Active High
0x000462%Active High
0x000359%Active High
0x000256%Active High
0x000153%Active High
0x000050%Active High
0x00301Active High
0x00205Active High
0x001010Active High
0x000020Active High
0x00c01Active High
0x00802Active High
0x00403Active High
0x00004Active High
0x00111Read Port, WriteSYSTEM, input_port_select_w
0x00851Read PortDSW2 (// DSW2)
0x000332 24 16 12 8 4 2 1Active High
0x000050 30 15 8 5 3 2 1Active High
0x0001100 50 25 10 5 3 2 1Active High
0x0002200 100 50 10 5 3 2 1Active High
0x000c1Active High
0x00082Active High
0x00043Active High
0x00005Active High
0x00700Active High
0x00601Active High
0x00502Active High
0x00403Active High
0x00304Active High
0x00205Active High
0x00106Active High
0x00007Active High
0x0080OffActive High
0x0000OnActive High
0x00861Read PortDSW3 (// DSW3)
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0x00871Writedynax_bank_w
Memory Area:mjderngr_iomap
Address RangeLengthFunctionDescription
0x00011Device Readaysnd, ay8910_device, data_r
0x0002-0x00032Device Writeaysnd, ay8910_device, data_address_w
0x00101Writemjderngr_coin_w (// palette bank is set separately)
0x00111Read Port, WriteSYSTEM, input_port_select_w
0x00201Writedynax_bank_w
0x00401Read PortDSW2
0x000332 24 16 12 8 4 2 1Active High
0x000050 30 15 8 5 3 2 1Active High
0x0001100 50 25 10 5 3 2 1Active High
0x0002200 100 50 10 5 3 2 1Active High
0x000c1Active High
0x00082Active High
0x00043Active High
0x00005Active High
0x00700Active High
0x00601Active High
0x00502Active High
0x00403Active High
0x00304Active High
0x00205Active High
0x00106Active High
0x00007Active High
0x0080OffActive High
0x0000OnActive High
0x004C1Read PortDSW1
0x000f96%Active High
0x000e93%Active High
0x000d90%Active High
0x000c87%Active High
0x000b84%Active High
0x000a81%Active High
0x000978%Active High
0x000875%Active High
0x000771%Active High
0x000668%Active High
0x000565%Active High
0x000462%Active High
0x000359%Active High
0x000256%Active High
0x000153%Active High
0x000050%Active High
0x00301Active High
0x00205Active High
0x001010Active High
0x000020Active High
0x00c01Active High
0x00802Active High
0x00403Active High
0x00004Active High
0x00601Writemjderngr_palbank_w
Memory Area:royalmah_iomap
Address RangeLengthFunctionDescription
0x00011Device Readaysnd, ay8910_device, data_r
0x0002-0x00032Device Writeaysnd, ay8910_device, data_address_w
0x00101Read Port, WriteDSW1, royalmah_palbank_w
0x000f96%Active High
0x000e93%Active High
0x000d90%Active High
0x000c87%Active High
0x000b84%Active High
0x000a81%Active High
0x000978%Active High
0x000875%Active High
0x000771%Active High
0x000668%Active High
0x000565%Active High
0x000462%Active High
0x000359%Active High
0x000256%Active High
0x000153%Active High
0x000050%Active High
0x00301Active High
0x00205Active High
0x001010Active High
0x000020Active High
0x00c01Active High
0x00802Active High
0x00403Active High
0x00004Active High
0x00111Read Port, WriteSYSTEM, input_port_select_w
Memory Area:royalmah_map
Address RangeLengthFunctionDescription
0x0000-0x6FFF28672ROM, Writeroyalmah_rom_w
0x7000-0x7FFF4096RAM, Sharednvram
0x8000-0xFFFF32768Write Only, Sharedvideoram
0x8000-0xFFFF32768ROM Bankbank1 (// banked ROMs not present in royalmah)
 

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:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF2621446301.2eCRC(1fc10e7c) (Fluke: 4461)
0x90000-0x10FFFF5242886302.3eCRC(02bbdf78) (Fluke: 20FE)
0x110000-0x18FFFF5242886303.5eCRC(0e71eea8) (Fluke: 5B8D)
0x190000-0x20FFFF5242886304.6eCRC(53c581d6) (Fluke: 7244)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512d63-2.8fCRC(af735b42) (Fluke: 59F5)
0x0200-0x03FF512d63-1.7fCRC(e7410136) (Fluke: 7D3D)
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