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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.
Lord of Gun (IGS, 1994)
Memory Area:lordgun_map
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM
0x200000-0x20FFFF65536RAM
0x210000-0x21FFFF65536RAM, Sharedpriority_ram (// PRIORITY)
0x300000-0x30FFFF65536RAM Write, Sharedlordgun_vram_0_w, vram.0 (// DISPLAY)
0x310000-0x313FFF16384RAM Write, Sharedlordgun_vram_1_w, vram.1 (// DISPLAY)
0x314000-0x314FFF4096RAM Write, Sharedlordgun_vram_2_w, vram.2 (// DISPLAY)
0x315000-0x317FFF12288RAM(//)
0x318000-0x319FFF8192RAM Write, Sharedlordgun_vram_3_w, vram.3 (// DISPLAY)
0x31C000-0x31C7FF2048RAM, Sharedscrollram (// LINE)
0x400000-0x4007FF2048RAM, Sharedspriteram (// ANIMATOR)
0x500000-0x500FFF4096RAM Write, Sharedlordgun_paletteram_w, paletteram
0x502000-0x5020012Write Only, Sharedscroll_x.0
0x502200-0x5022012Write Only, Sharedscroll_x.1
0x502400-0x5024012Write Only, Sharedscroll_x.2
0x502600-0x5026012Write Only, Sharedscroll_x.3
0x502800-0x5028012Write Only, Sharedscroll_y.0
0x502A00-0x502A012Write Only, Sharedscroll_y.1
0x502C00-0x502C012Write Only, Sharedscroll_y.2
0x502E00-0x502E012Write Only, Sharedscroll_y.3
0x503000-0x5030012Writelordgun_priority_w
0x503800-0x5038012Readlordgun_gun_0_x_r
0x503A00-0x503A012Readlordgun_gun_1_x_r
0x503C00-0x503C012Readlordgun_gun_0_y_r
0x503E00-0x503E012Readlordgun_gun_1_y_r
0x504000-0x5040012Writelordgun_soundlatch_w
0x506000-0x5060078Device Read/Write 8-bitppi8255_0, i8255_device, read, write, 0x00ff
0x0001OffActive High
0x0000OnActive High
0x0002IGSActive High
0x0000KonamiActive High
0x0004ExcitingActive High
0x0000TenderActive High
0x00001Active High
0x00082Active High
0x0010Button 1Active Low
0x0020Button 1Active Low
0x0080SpecialActive High
0x508000-0x5080078Device Read/Write 8-bitppi8255_1, i8255_device, read, write, 0x00ff
0x0001Start 1Active Low
0x0002UnknownActive Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0080Service 2Active Low
0x50A900-0x50A9FF256Read/Writelordgun_protection_r, lordgun_protection_w
Memory Area:lordgun_soundio_map
Address RangeLengthFunctionDescription
0x1000-0x10012Device Writeymsnd, ym3812_device, write
0x20001Device Read/Writeoki, okim6295_device, read, write
0x30001Device Readsoundlatch2, generic_latch_8_device, read
0x40001Device Readsoundlatch, generic_latch_8_device, read
0x50001Read NOP
0x60001Writelordgun_okibank_w
Memory Area:lordgun_soundmem_map
Address RangeLengthFunctionDescription
0x0000-0xEFFF61440ROM
0xF000-0xFFFF4096RAM
 

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:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288lordgun.100CRC(b4e0fa07) (Fluke: 7C93)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536lordgun.90CRC(d59b5e28) (Fluke: 5C17)
Memory Area:sprites
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFFF2097152igsa001.14CRC(400abe33) (Fluke: 06D3)
0x200000-0x3FFFFF2097152igsa004.13CRC(52687264) (Fluke: 20A8)
0x400000-0x5FFFFF2097152igsa002.9CRC(a4810e38) (Fluke: C714)
0x600000-0x7FFFFF2097152igsa005.8CRC(e32e79e3) (Fluke: 0E44)
0x800000-0x9FFFFF2097152igsa003.3CRC(649e48d9) (Fluke: 4930)
0xA00000-0xBFFFFF2097152igsa006.2CRC(39288eb6) (Fluke: 30F6)
Memory Area:tiles0
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFFF1048576igst001.108CRC(36dd96f3) (Fluke: F263)
0x100000-0x1FFFFF1048576igst002.114CRC(816a7665) (Fluke: A37C)
0x200000-0x2FFFFF1048576igst003.119CRC(cbfee543) (Fluke: 6CE2)
Memory Area:tiles1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFFF2097152igsb001.82CRC(3096de1c) (Fluke: EC1C)
0x200000-0x3FFFFF2097152igsb002.91CRC(2234531e) (Fluke: 5F5F)
0x400000-0x5FFFFF2097152igsb003.97CRC(6cbf21ac) (Fluke: F214)
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