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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.
Lock On (Philko, 1991)
Memory Area:lockonph_map
Address RangeLengthFunctionDescription
0x0000-0xBFFFF786432ROM
0x3F0000-0x3FFFFF65536Writerom_5704_bank_w
0x400000-0x40FFFF65536Device Read/Write, Sharedsegaic16vid, segaic16_video_device, tileram_r, tileram_w, tileram
0x410000-0x410FFF4096Device Read/Write, Sharedsegaic16vid, segaic16_video_device, textram_r, textram_w, textram
0x440000-0x4407FF2048RAM, Sharedsprites
0x777706-0x7777072Writesound_w16 (// AM_DEVWRITE8("soundlatch", generic_latch_8_device, write, 0xff00))
0x840000-0x841FFF8192RAM Write, Sharedphilko_paletteram_w, paletteram
0xC40000-0xC400012Write NOP(// coin counters etc.?)
0xC41000-0xC410012Read PortP1
0x0001Button 1Active Low
0x0002Button 2Active Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010Joystick DownActive Low
0x0020Joystick UpActive Low
0x0040Joystick RightActive Low
0x0080Joystick LeftActive Low
0xC41002-0xC410032Read PortP2
0x0001Button 1Active Low
0x0002Button 2Active Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010Joystick DownActive Low
0x0020Joystick UpActive Low
0x0040Joystick RightActive Low
0x0080Joystick LeftActive Low
0xC41004-0xC410052Read PortSERVICE
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0008Service 1Active Low
0x0010Start 1Active Low
0x0020Start 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC42000-0xC420012Read PortDSW1
0x0007Coin_AActive High
0x00004C_1CActive High
0x00043C_1CActive High
0x00022C_1CActive High
0x00071C_1CActive High
0x00031C_2CActive High
0x00051C_3CActive High
0x00011C_4CActive High
0x00061C_5CActive High
0x0038Coin_BActive High
0x00004C_1CActive High
0x00203C_1CActive High
0x00102C_1CActive High
0x00381C_1CActive High
0x00181C_2CActive High
0x00281C_3CActive High
0x00081C_4CActive High
0x00301C_5CActive High
0x0040UnknownActive High
0x0040OffActive High
0x0000OnActive High
0x0080Flip_ScreenActive High
0x0080OffActive High
0x0000OnActive High
0xC42002-0xC420032Read PortDSW2
0x0007DifficultyActive High
0x00000Active High
0x00011Active High
0x00022Active High
0x00033Active High
0x00044Active High
0x00055Active High
0x00066Active High
0x00077Active High
0x0008Allow_ContinueActive High
0x0008NoActive High
0x0000YesActive High
0x0010RegionActive High
0x0010KoreaActive High
0x0000EuropeActive High
0x0020UnknownActive High
0x0020OffActive High
0x0000OnActive High
0x0040UnknownActive High
0x0040OffActive High
0x0000OnActive High
0x0080UnknownActive High
0x0080OffActive High
0x0000OnActive High
0xFF0000-0xFFFFFF65536RAM, Sharedworkram
Memory Area:lockonph_sound_iomap
Address RangeLengthFunctionDescription
0x0000-0x00012Device Read/Writeymsnd, ym2151_device, read, write
0x00401Write NOP(// ??)
0x00801Device Read/Writeoki, okim6295_device, read, write
0x00C01Device Readsoundlatch, generic_latch_8_device, read
Memory Area:lockonph_sound_map
Address RangeLengthFunctionDescription
0x0000-0xF7FF63488ROM
0xF800-0xFFFF2048RAM
 

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
0x0000-0x1FFFF131072B10CRC(d3a8bd15)
0x20000-0x3FFFF131072B7CRC(787c382e)
0x40000-0x5FFFF131072B9CRC(aae2cef1)
0x60000-0x7FFFF131072B8CRC(cd30abe0)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072B5CRC(d6369a39)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536B6CRC(aa7b1880)
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