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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 Friday (Dynax, 1989)
Memory Area:mjfriday_io_map
Address RangeLengthFunctionDescription
0x00001Writedynax_blit_pen_w (// Destination Pen)
0x00011Writedynax_blit_palette01_w (// Layers Palettes (Low Bits))
0x00021Writedynax_rombank_w (// BANK ROM Select)
0x00031Writedynax_blit_backpen_w (// Background Color)
0x0010-0x00112Writemjdialq2_blit_dest_w (// Destination Layer)
0x00121Writedynax_blit_palbank_w (// Layers Palettes (High Bit))
0x00131Writedynax_flipscreen_w (// Flip Screen)
0x00141Writedynax_coincounter_0_w (// Coin Counters)
0x00151Writedynax_coincounter_1_w (//)
0x0016-0x00172Writemjdialq2_layer_enable_w (// Layers Enable)
0x0041-0x00477Writedynax_blitter_rev2_w (// Blitter)
0x00601Writehanamai_keyboard_w (// keyboard row select)
0x00611Read PortCOINS (// Coins)
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004ServiceActive Low
0x0008Service 2Active Low
0x0010Memory ResetActive Low
0x0020UnknownActive Low
0x0040Coin 1Active Low
0x0080UnknownActive Low
0x00621Readhanamai_keyboard_1_r (// P2)
0x00631Readhanamai_keyboard_0_r (// P1)
0x00641Read PortDSW0 (// DSW)
0x00003C_1CActive High
0x00022C_1CActive High
0x00031C_1CActive High
0x00011C_2CActive High
0x0000NoActive High
0x0004YesActive High
0x0018WeakActive High
0x0010NormalActive High
0x0008StrongActive High
0x0000StrongestActive High
0x0060WeakActive High
0x0040NormalActive High
0x0020StrongActive High
0x0000StrongestActive High
0x0080OffActive High
0x0000OnActive High
0x00671Read PortDSW1 (// DSW)
0x0000NoActive High
0x0001YesActive 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
0x0070-0x00712Device Writeym2413, ym2413_device, write (//)
Memory Area:sprtmtch_mem_map
Address RangeLengthFunctionDescription
0x0000-0x6FFF28672ROM
0x7000-0x7FFF4096RAM, Sharednvram
0x8000-0xFFFF32768ROM Bankbank1
 

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
0x0000-0x1FFFF1310722601.2hCRC(70a01fc7) (Fluke: 1F08)
0x20000-0x3FFFF1310722602.2gCRC(d9167c10) (Fluke: DC00)
0x40000-0x5FFFF1310722603.2fCRC(11892916) (Fluke: 0408)
0x60000-0x7FFFF1310722604.2eCRC(3cc1a65d) (Fluke: 1F87)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF655362606.2bCRC(00e0e0d3) (Fluke: 4DF7)
0x28000-0x37FFF655362605.2cCRC(5459ebda) (Fluke: CD3C)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512d26_2.9eCRC(d6db5c60) (Fluke: 188C)
0x0200-0x03FF512d26_1.8eCRC(af5edf32) (Fluke: DA95)
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