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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.
Gun Hard (Data East Corporation, 1994)
Memory Area:lockload_map
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM
0x100000-0x11FFFF131072RAM, Sharedram
0x120000-0x127FFF32768Read/Write 16-bitdg_protection_region_0_146_r, dg_protection_region_0_146_w, 0x0000ffff
0x128000-0x12800F16Read/Writeirq_controller_r, irq_controller_w
0x130000-0x131FFF8192RAM Write, Sharedbuffered_palette_w, paletteram
0x138000-0x1380034Read Only, Write NOP(//palette dma complete in bit 0x8? ack? return 0 else tight loop)
0x138008-0x13800B4Writepalette_dma_w
0x170000-0x1700078Readlockload_gun_mirror_r (/* Not on Dragongun */)
0x178008-0x17800F8Write NOP(/* Gun read ACK's */)
0x180000-0x18001F32Device Read/Writetilegen1, deco16ic_device, pf_control_dword_r, pf_control_dword_w
0x190000-0x191FFF8192Device Read/Writetilegen1, deco16ic_device, pf1_data_dword_r, pf1_data_dword_w
0x194000-0x195FFF8192Device Read/Writetilegen1, deco16ic_device, pf2_data_dword_r, pf2_data_dword_w
0x1A0000-0x1A3FFF16384RAM Write, Sharedpf1_rowscroll_w, pf1_rowscroll32
0x1A4000-0x1A5FFF8192RAM Write, Sharedpf2_rowscroll_w, pf2_rowscroll32
0x1C0000-0x1C001F32Device Read/Writetilegen2, deco16ic_device, pf_control_dword_r, pf_control_dword_w
0x1D0000-0x1D1FFF8192Device Read/Writetilegen2, deco16ic_device, pf1_data_dword_r, pf1_data_dword_w
0x1D4000-0x1D5FFF8192Device Read/Writetilegen2, deco16ic_device, pf2_data_dword_r, pf2_data_dword_w (// unused)
0x1E0000-0x1E3FFF16384RAM Write, Sharedpf3_rowscroll_w, pf3_rowscroll32
0x1E4000-0x1E5FFF8192RAM Write, Sharedpf4_rowscroll_w, pf4_rowscroll32 (// unused)
0x204800-0x204FFF2048RAM(//0x10 byte increments only)
0x208000-0x208FFF4096RAM, Sharedlay0
0x20C000-0x20CFFF4096RAM, Sharedlay1
0x210000-0x217FFF32768RAM, Sharedlook0
0x218000-0x21FFFF32768RAM, Sharedlook1
0x220000-0x221FFF8192RAM, Sharedspriteram (/* Main spriteram */)
0x228000-0x2283FF1024RAM(//0x10 byte increments only)
0x230000-0x2300034Writespriteram_dma_w
0x300000-0x3FFFFF1048576ROM
0x420000-0x4200034Read/Writeeeprom_r, eeprom_w
0x440000-0x4400034Readservice_r
0x500000-0x5000034Writesprite_control_w
Memory Area:nslasher_io_sound
Address RangeLengthFunctionDescription
0x0000-0xFFFF65536ROM, Regionaudiocpu, 0
Memory Area:nslasher_sound
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0xA000-0xA0012Device Read/Writeymsnd, ym2151_device, read, write
0xB0001Device Read/Writeoki1, okim6295_device, read, write
0xC0001Device Read/Writeoki2, okim6295_device, read, write
0xD0001Readlatch_r
 

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
0x0000-0xFFFF65536nj-06-1.p22CRC(31d1c245) (Fluke: 83A1)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288mbm-00.d15CRC(b97de8ff),Encrypted tiles (Fluke: AC95)
0x80000-0xFFFFF524288mbm-01.d17CRC(6d4b8fa0) (Fluke: 8093)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144mbm-02.b21CRC(e723019f),Encrypted tiles 0/4 (Fluke: ED0A)
0x80000-0xBFFFF262144mbm-03.b22CRC(e0d09894),Encrypted tiles 0/4 (Fluke: ED34)
0x100000-0x13FFFF262144mbm-04.e21CRC(9e12466f),Encrypted tiles 0/4 (Fluke: 9026)
0x180000-0x1BFFFF262144mbm-05.e22CRC(6ff02dc0),Encrypted tiles 0/4 (Fluke: C193)
Memory Area:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288mbm-07.n19CRC(414f3793) (Fluke: A4E1)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFFF1048576mbm-06.n17CRC(f34d5999) (Fluke: 7221)
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