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.
Memory Area:yutnori_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0x300000-0x3000012Read PortDSW1
0x00041 / 50Active High
0x00031 / 40Active High
0x00021 / 30Active High
0x00072 / 50Active High
0x00062 / 40Active High
0x00052 / 30Active High
0x00013 / 50Active High
0x00003 / 40Active High
0x0038DifficultyActive High
0x00301Active High
0x00282Active High
0x00203Active High
0x00384Active High
0x00185Active High
0x00106Active High
0x00087Active High
0x00008Active High
0x00402Active High
0x00c03Active High
0x00004Active High
0x00805Active High
0x0100Joystick UpActive Low
0x0200Joystick DownActive Low
0x0400Joystick LeftActive Low
0x0800Joystick RightActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000Button 3Active Low
0x8000UnknownActive High
0x300002-0x3000032Read PortDSW2
0x000020Active High
0x000130Active High
0x000240Active High
0x000350Active High
0x0004150Active High
0x0008200Active High
0x000c300Active High
0x0000400Active High
0x0010800 1200 1600Active High
0x00301000 1500 2000Active High
0x00001200 1800 2400Active High
0x00201000 2000 3000Active High
0x0040OnActive High
0x0000OffActive High
0x0100Joystick UpActive Low
0x0200Joystick DownActive Low
0x0400Joystick LeftActive Low
0x0800Joystick RightActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000Button 3Active Low
0x8000UnknownActive High
0x300004-0x3000052Read PortSYSTEM
0x0100Start 1Active Low
0x0200Start 2Active Low
0x0400Coin 1Active Low
0x0800Coin 2Active Low
0x1000UnknownActive Low
0x2000TiltActive Low
0x4000Coin 3Active Low
0x8000UnknownActive Low
0x30000C-0x30000D2Write NOP
0x30000E-0x30000F2Read NOP(//AM_READ( yutnori_unk_r ) // ??)
0x400000-0x4000012Read/Write NOP
0x500000-0x5001FF512RAM Device Write, Sharedpalette, palette_device, write, palette
0x600000-0x601FFF8192Device Read/Writepandora, kaneko_pandora_device, spriteram_LSB_r, spriteram_LSB_w
0x700000-0x70FFFF65536RAM
0x800000-0x8000012Read NOP, Writesnowbros_irq4_ack_w (/* IRQ 4 acknowledge */)
0x900000-0x9000012Read NOP, Writesnowbros_irq3_ack_w (/* IRQ 3 acknowledge */)
0xA00000-0xA000012Read NOP, Writesnowbros_irq2_ack_w (/* IRQ 2 acknowledge */)
 

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
0x0000-0x7FFFF524288GRAPHICS_ROM_1CRC(d4881b49)
0x0000-0x7FFFF524288SOUND ROMCRC(d24c2e43)
0x80000-0xFFFFF524288GRAPHICS_ROM_2CRC(8cd9ce60)
0x100000-0x11FFFF131072GRAPHICS_ROM_3CRC(04f7c2ac)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144VOICE_ROMCRC(25e85201)
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