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:pastelg_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xE000-0xE7FF2048RAM, Sharednvram
Memory Area:threeds_io_map
Address RangeLengthFunctionDescription
0x00811Device Readaysnd, ay8910_device, data_r
0x0082-0x00832Device Writeaysnd, ay8910_device, data_address_w
0x00901Read Port, WriteSYSTEM, threeds_romsel_w
0x00A01Read/Writethreeds_inputport1_r, threeds_inputportsel_w
0x00B01Read, Writethreeds_inputport2_r, threeds_output_w (//writes: bit 3 is coin lockout, bit 1 is coin counter)
0x00C01Readthreeds_rom_readback_r
0x00C0-0x00CF16Write Only, Sharedclut
0x00D01Read, Device Writepastelg_irq_ack_r, dac, dac_byte_interface, write
0x00F0-0x00F67Writepastelg_blitter_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
0x0000-0x7FFF32768dg1.ic11CRC(5734ca7d) (Fluke: A916)
0x8000-0xFFFF32768dg2.ic10CRC(c7f21718) (Fluke: 1506)
0x10000-0x17FFF32768dg3.ic9CRC(87bd0a9e) (Fluke: 9D3D)
0x18000-0x1FFFF32768dg4.ic8CRC(b75ecf2b) (Fluke: C9BD)
0x20000-0x27FFF32768dg5.ic7CRC(22ee5cf6) (Fluke: 24E9)
0x28000-0x2FFFF32768dg6.ic6CRC(d86ebe8d) (Fluke: FB2D)
0x30000-0x37FFF32768dg7.ic5CRC(6704950a) (Fluke: D73A)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384dg8.ic3CRC(06c6a98f)
0x4000-0x7FFF16384dg9.ic2CRC(a53eca09)
0x8000-0xBFFF16384dg10.ic1CRC(6c380c64)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32mb7112e.7hCRC(2c4f7343) (Fluke: EC4A)
0x0020-0x003F32mb7112e.7jCRC(181f2a88) (Fluke: D4AE)
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