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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.
Dolmen (Afega, 1995)
Memory Area:twinactn_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0x80000-0x800012Read PortIN0
0x80002-0x800032Read PortIN1
0x80004-0x800052Read PortDSW1
0x0001UnknownActive High
0x0001OffActive High
0x0000OnActive High
0x0002UnknownActive High
0x0002OffActive High
0x0000OnActive High
0x000cDifficultyActive High
0x0008EasyActive High
0x000cNormalActive High
0x0004HardActive High
0x0000HardestActive High
0x0010UnknownActive High
0x0010OffActive High
0x0000OnActive High
0x0020UnknownActive High
0x0020OffActive High
0x0000OnActive High
0x0080500kActive High
0x00c0800kActive High
0x00401000kActive High
0x00001500kActive High
0x0100UnknownActive High
0x0100OffActive High
0x0000OnActive High
0x0200Demo_SoundsActive High
0x0000OffActive High
0x0200OnActive High
0x1c00Coin_BActive High
0x10004C_1CActive High
0x08003C_1CActive High
0x18002C_1CActive High
0x1c001C_1CActive High
0x0c001C_2CActive High
0x14001C_3CActive High
0x04001C_4CActive High
0x0000Credits Don't RegisterActive High
0xe000Coin_AActive High
0x80004C_1CActive High
0x40003C_1CActive High
0xc0002C_1CActive High
0xe0001C_1CActive High
0x60001C_2CActive High
0xa0001C_3CActive High
0x20001C_4CActive High
0x0000Credits Don't RegisterActive High
0x8000E-0x8000F2Read/Write NOP
0x80014-0x800152Writenmk_flipscreen_w
0x80016-0x800172Write NOP(// frame number?)
0x8001E-0x8001F2Writeafega_soundlatch_w
0x88000-0x887FF2048RAM Device Write, Sharedpalette, palette_device, write, palette
0x8C000-0x8C0012Writemustang_scroll_w
0x8C002-0x8C087134Write NOP(// ??)
0x90000-0x93FFF16384RAM Write, Sharednmk_bgvideoram0_w, nmk_bgvideoram0
0x9C000-0x9C7FF2048RAM Write, Sharednmk_txvideoram_w, nmk_txvideoram
0xF0000-0xFFFFF65536RAM Write, Sharednmk16_mainram_strange_w, mainram
Memory Area:twinactn_sound_cpu
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0x90001Writetwinactn_oki_bank_w
0x98001Device Read/Writeoki1, okim6295_device, read, write
0xA0001Device Readsoundlatch, generic_latch_8_device, read (// From Main CPU)
 

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
0x0000-0x1FFFF131072afega6.uj11CRC(13fa4415)
0x0000-0x7FFF32768afega1.su6CRC(166b53cb)
0x0000-0x7FFFF524288afega9.ui20CRC(b3fa7be6)
Memory Area:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072afega2.su12CRC(1a2ce1c2)
0xA0000-0xBFFFF131072afega3.su13CRC(d3531018)
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