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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.
Zero Target (Data East Corporation, 1985)
Memory Area:gekitsui_cpu1_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096RAM, Sharedshare1
0x1000-0x11FF512RAM, Sharedspriteram
0x1200-0x1FFF3584RAM
0x2000-0x23FF1024RAM Write, Sharedcntsteer_foreground_vram_w, videoram
0x2400-0x27FF1024RAM Write, Sharedcntsteer_foreground_attr_w, colorram
0x3000-0x30034Writezerotrgt_ctrl_w
0x8000-0xFFFF32768ROM
Memory Area:gekitsui_cpu2_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096RAM, Sharedshare1
0x1000-0x1FFF4096RAM Write, Sharedcntsteer_background_w, videoram2
0x3000-0x30045Writezerotrgt_vregs_w
0x30001Read PortDSW0
0x0003Coin_AActive High
0x00031C_2CActive High
0x00021C_3CActive High
0x00011C_4CActive High
0x00001C_6CActive High
0x000cCoin_BActive High
0x00004C_1CActive High
0x00043C_1CActive High
0x00082C_1CActive High
0x000c1C_1CActive High
0x0010CabinetActive High
0x0000UprightActive High
0x0010CocktailActive High
0x0020DifficultyActive High
0x0020NormalActive High
0x0000HardActive High
0x0040LivesActive High
0x00403Active High
0x00005Active High
0x0080Bonus_LifeActive High
0x008030K onlyActive High
0x000030K and 100KActive High
0x30011Read PortP2
0x0001Joystick LeftActive Low
0x0002Joystick RightActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0060UnusedActive Low
0x0080CustomActive High
0x30021Read PortP1
0x0001Joystick LeftActive Low
0x0002Joystick RightActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020UnusedActive Low
0x0040Start 1Active Low
0x0080Start 2Active Low
0x30031Read PortCOINS
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x00f8UnusedActive Low
0x30051Writegekitsui_sub_irq_ack
0x30071Writecntsteer_sound_w
0x4000-0xFFFF49152ROM
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x01FF512RAM
0x20001Device Writeay1, ay8910_device, data_w
0x40001Device Writeay1, ay8910_device, address_w
0x60001Device Writeay2, ay8910_device, data_w
0x80001Device Writeay2, ay8910_device, address_w
0xA0001Device Readsoundlatch, generic_latch_8_device, read
0xD0001Writenmimask_w
0xE000-0xFFFF8192ROM
 

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
0xE000-0xFFFF8192cw00.c1CRC(ae091b6c) (Fluke: B996)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384cw05.h16CRC(e7a24404) (Fluke: 1383)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768cw02.c14CRC(d2a0bb72) (Fluke: D923)
0x8000-0xFFFF32768cw03.c15CRC(79f2be20) (Fluke: 8BB2)
0x10000-0x17FFF32768cw04.c17CRC(1037cce8) (Fluke: DD04)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384cw09.j4CRC(8c859d41) (Fluke: 66B0)
0x10000-0x13FFF16384cw11.j7CRC(5da2d9d8) (Fluke: 26DC)
0x20000-0x23FFF16384cw13.j10CRC(b004cedd) (Fluke: C25B)
0x30000-0x33FFF16384cw15.j13CRC(4473fe66) (Fluke: 6292)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192cw10.j6CRC(16073975) (Fluke: 464F)
0x10000-0x11FFF8192cw12.j9CRC(9776974e) (Fluke: 64E6)
0x20000-0x21FFF8192cw14.j12CRC(5f77e84d) (Fluke: 5254)
0x30000-0x31FFF8192cw16.j15CRC(ebed04d3) (Fluke: 9EF2)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x8000-0xFFFF32768cw01.c4CRC(b35a16cb) (Fluke: A0FA)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x002B44pal10h8.f12
0x0100-0x012B44pal10h8.e14PAL is read protected
0x0200-0x023352pal12l6.f17
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256mb7118h.k7CRC(4a7c187a) (Fluke: 0AB7)
0x0100-0x01FF2566301-in.k6CRC(cc9c7d43) (Fluke: 3478)
Memory Area:subcpu
Address RangeLengthLabel/LocationDescription
0x4000-0x7FFF16384cw08.a16CRC(c485a494)
0x8000-0xFFFF32768cw19.a13CRC(e95b9b34)
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