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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.
Target Hits (Gaelco, 1994)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM
0x100000-0x103FFF16384RAM Write, Sharedvram_w, videoram (/* Video RAM */)
0x108000-0x1080078Write Only, Sharedvregs (/* Video Registers */)
0x108000-0x1080012Read PortGUNX1
0x01ffLightgun XActive High
0xfe00UnknownActive High
0x108002-0x1080032Read PortGUNY1
0x01ffLightgun YActive High
0xfe00UnknownActive High
0x108004-0x1080052Read PortGUNX2
0x01ffLightgun XActive High
0xfe00UnknownActive High
0x108006-0x1080072Read PortGUNY2
0x01ffLightgun YActive High
0xfe00UnknownActive High
0x10800C-0x10800D2Write NOP(/* CLR Video INT */)
0x200000-0x2007FF2048RAM Device Write, Sharedpalette, palette_device, write, palette (/* Palette */)
0x440000-0x440FFF4096RAM, Sharedspriteram (/* Sprite RAM */)
0x700000-0x7000012Read PortDSW2
0x0001EasyActive High
0x0003NormalActive High
0x0002HardActive High
0x0000HardestActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0000OffActive High
0x0020OnActive High
0x0040OffActive High
0x0000OnActive High
0x0000OnActive High
0x700002-0x7000032Read PortDSW1
0x00026C_1CActive High
0x00035C_1CActive High
0x00044C_1CActive High
0x00053C_1CActive High
0x00062C_1CActive High
0x00013C_2CActive High
0x00004C_3CActive High
0x00071C_1CActive High
0x00381C_1CActive High
0x00003C_4CActive High
0x00082C_3CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x00181C_5CActive High
0x00101C_6CActive High
0x0040Start 1C/Continue 1CActive High
0x0000Start 2C/Continue 1CActive High
0x0080OffActive High
0x700006-0x7000072Read PortSYSTEM (/* Coins, Start & Fire buttons */)
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010Button 1Active Low
0x0020Button 1Active Low
0x0040Start 1Active Low
0x0080Start 2Active Low
0x700008-0x7000092Read PortSERVICE (/* Service & Guns Reload? */)
0x0001Service 1Active Low
0x0002UnknownActive Low
0x0004Button 2Active Low
0x0008Button 2Active Low
0x00f0UnknownActive Low
0x70000C-0x70000D2WriteOKIM6295_bankswitch_w (/* OKI6295 bankswitch */)
0x70000E-0x70000F2Device Read/Write 8-bitoki, okim6295_device, read, write, 0x00ff (/* OKI6295 status register */)
0x700010-0x70001B12Write NOP(/* ??? Guns reload related? */)
0x70002A-0x70003B18Writecoin_counter_w (/* Coin counters */)
0xFE0000-0xFEFFFF65536RAM(/* Work RAM (partially shared with DS5002FP) */)
 

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
0x0000-0x7FFFF524288targeth.i13CRC(b892be24) (Fluke: 2658)
0x0000-0x7FFFF524288targeth.i13CRC(b892be24) (Fluke: 2658)
0x80000-0xFFFFF524288targeth.i11CRC(6797faf9) (Fluke: EF80)
0x80000-0xFFFFF524288targeth.i11CRC(6797faf9) (Fluke: EF80)
0x100000-0x17FFFF524288targeth.i9CRC(0e922c1c) (Fluke: F546)
0x100000-0x17FFFF524288targeth.i9CRC(0e922c1c) (Fluke: F546)
0x180000-0x1FFFFF524288targeth.i7CRC(d8b41000) (Fluke: 639A)
0x180000-0x1FFFFF524288targeth.i7CRC(d8b41000) (Fluke: 639A)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768targeth_ds5002fp.bin
0x0000-0x7FFF32768targeth_ds5002fp.bin
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288targeth.c1CRC(d6c9dfbc) (Fluke: F3C1)
0x0000-0x7FFFF524288targeth.c1CRC(d6c9dfbc) (Fluke: F3C1)
0x80000-0xFFFFF524288targeth.c3CRC(d4c771df) (Fluke: 453F)
0x80000-0xFFFFF524288targeth.c3CRC(d4c771df) (Fluke: 453F)
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