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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.
Bygone (Taito Corporation, 1985)
Memory Area:lkage_io_map
Address RangeLengthFunctionDescription
0x4000-0x7FFF16384Readport_fetch_r
Memory Area:lkage_m68705_map
Address RangeLengthFunctionDescription
0x00001Read/Writelkage_68705_port_a_r,lkage_68705_port_a_w
0x00011Read/Writelkage_68705_port_b_r,lkage_68705_port_b_w
0x00021Read/Writelkage_68705_port_c_r,lkage_68705_port_c_w
0x00041Writelkage_68705_ddr_a_w
0x00051Writelkage_68705_ddr_b_w
0x00061Writelkage_68705_ddr_c_w
0x0010-0x007F112RAM
0x0080-0x07FF1920ROM
Memory Area:lkage_map
Address RangeLengthFunctionDescription
0x0000-0xDFFF57344ROM
0xE000-0xE7FF2048RAM(/* work ram */)
0xE800-0xEFFF2048RAM Device Write, Sharedpalette, palette_device, write, palette
0xF000-0xF0034RAM, Sharedvreg (/* video registers */)
0xF0601Writelkage_sound_command_w
0xF0611Write NOP, Readsound_status_r
0xF0621Read/Writelkage_mcu_r,lkage_mcu_w
0xF0631Write NOP(/* pulsed; nmi on sound cpu? */)
0xF0801Read PortDSW1
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x00183Active High
0x00104Active High
0x00085Active High
0x0000255 (Cheat)Active High
0x0000OffActive High
0x0040OnActive High
0x0000UprightActive High
0x0080CocktailActive High
0xF0811Read PortDSW2
0x000f9C_1CActive High
0x000e8C_1CActive High
0x000d7C_1CActive High
0x000c6C_1CActive High
0x000b5C_1CActive High
0x000a4C_1CActive High
0x00093C_1CActive High
0x00082C_1CActive High
0x00001C_1CActive High
0x00011C_2CActive High
0x00021C_3CActive High
0x00031C_4CActive High
0x00041C_5CActive High
0x00051C_6CActive High
0x00061C_7CActive High
0x00071C_8CActive High
0x00f09C_1CActive High
0x00e08C_1CActive High
0x00d07C_1CActive High
0x00c06C_1CActive High
0x00b05C_1CActive High
0x00a04C_1CActive High
0x00903C_1CActive High
0x00802C_1CActive High
0x00001C_1CActive High
0x00101C_2CActive High
0x00201C_3CActive High
0x00301C_4CActive High
0x00401C_5CActive High
0x00501C_6CActive High
0x00601C_7CActive High
0x00701C_8CActive High
0xF0821Read PortDSW3
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xF0831Read PortSYSTEM
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004Service 1Active High
0x0008TiltActive Low
0x0010Coin 1Active High
0x0020Coin 2Active High
0x0040UnknownActive High
0x0080UnknownActive High
0xF0841Read PortP1
0x0001Button 1Active Low
0x0002Button 2Active Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Joystick DownActive Low
0x0020Joystick UpActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xF0861Read PortP2
0x0001Button 1Active Low
0x0002Button 2Active Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Joystick DownActive Low
0x0020Joystick UpActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xF0871Readlkage_mcu_status_r
0xF0A0-0xF0A34RAM(/* unknown */)
0xF0C0-0xF0C56RAM, Sharedscroll
0xF0E11Write NOP(/* pulsed */)
0xF100-0xF15F96RAM, Sharedspriteram
0xF160-0xF1FF160RAM(/* unknown - no valid sprite data */)
0xF400-0xFFFF3072RAM Write, Sharedlkage_videoram_w, videoram
Memory Area:lkage_sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0x9000-0x90012Device Read/Writeym1, ym2203_device, read, write
0xA000-0xA0012Device Read/Writeym2, ym2203_device, read, write
0xB0001Device Read, Write NOPsoundlatch, generic_latch_8_device, read, (/* ??? */)
0xB0011Read NOP(/* ??? */ AM_WRITE(lkage_sh_nmi_enable_w))
0xB0021Writelkage_sh_nmi_disable_w
0xB0031Write NOP
0xE000-0xEFFF4096ROM(/* space for diagnostic ROM? */)
 

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
0x0000-0x7FFF32768a53_07.ic54CRC(72f69a77)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384a53_01.ic84CRC(38cf7fb2)
0x4000-0x7FFF16384a53_02.ic85CRC(dca7adfe)
0x8000-0xBFFF16384a53_03.ic86CRC(af3eb997)
0xC000-0xFFFF16384a53_04.ic87CRC(65af72d3)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768a53_05.ic37CRC(63a3f08b)
0x8000-0xFFFF32768a53_06.ic38CRC(cb0dcb08)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048a51_09.ic53CRC(0e8b8846),the same as lkage (Fluke: 7AFD)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024a54-10.ic2CRC(369722d9),unknown
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384a53_08.ic51CRC(f85139f9)
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