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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.
Star Audition (Namco, 1997)
Memory Area:mj4simai_map
Address RangeLengthFunctionDescription
0x0000-0x1FFFFF2097152ROM(// ROM)
0x200000-0x20FFFF65536RAM(// RAM)
0x600000-0x6000012Readmj4simai_p1_r (// P1)
0x600002-0x6000032Readmj4simai_p2_r (// P2)
0x600004-0x6000052Writemj4simai_keyboard_w (// select keyboard row to read)
0x600006-0x6000072Device Readwatchdog, watchdog_timer_device, reset16_r
0x600100-0x6001012Read PortSYSTEM (//)
0x0001Coin 1Active Low
0x0002DegaussActive Low
0x0004Service 1Active Low
0x0008ResetActive Low
0x0010Service 4Active Low
0x0020Start 2Active Low
0x0040Start 3Active Low
0x0080CustomActive Low
0xff00Start 4Active Low
0x600200-0x6002012Write NOP(// Leds? Coins?)
0x600300-0x6003012Read PortDSW1 (// DSW 1)
0x0002OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0000OffActive High
0x0020OnActive High
0xff00UnknownActive Low
0x600300-0x60030F16Writesound_bank_w (// Samples Banks)
0x600302-0x6003032Read PortDSW2 (// DSW 2)
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xff00UnknownActive Low
0xB00000-0xB03FFF16384Device Read/Writex1snd, x1_010_device, word_r, word_w (// Sound)
0xC00000-0xC3FFFF262144RAM, Sharedspriteram (// Sprites)
0xC40000-0xC4FFFF65536RAM Device Write, Sharedpalette, palette_device, write, palette (// Palette)
0xC60000-0xC6003F64Write, Sharedvregs_w, vregs (// Video Registers)
0xFFFC00-0xFFFFFF1024Device Read/Writetmp68301, tmp68301_device, regs_r, regs_w (// TMP68301 Registers)
Memory Area:staraudi_map
Address RangeLengthFunctionDescription
0x0000-0x1FFFFF2097152ROM(// ROM)
0x200000-0x23FFFF262144RAM(// RAM)
0x400000-0x45FFFF393216Read/Write, Sharedstaraudi_tileram_r, staraudi_tileram_w, tileram (// Tile RAM)
0x500000-0x57FFFF524288RAM, Sharedrgbram
0x600000-0x6000012Writestaraudi_camera_w (// Camera Outputs)
0x700000-0x7000012Read PortP1 (// P1)
0x0001Joystick LeftActive Low
0x0002Joystick RightActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Camera Variables? (CheatActive Low
0x0040Flip Screen / Monitor Sync (CheatActive Low
0x0080Reset Monitor Sync (CheatActive Low
0xff00UnknownActive Low
0x700002-0x7000032Read PortP2 (// P2)
0x0001Joystick LeftActive Low
0x0002Joystick RightActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Slow Motion (CheatActive Low
0x0040Pause (CheatActive Low
0x0080Button 4Active Low
0xff00UnknownActive Low
0x700004-0x7000052Read PortSYSTEM (// Coins)
0x0001Coin 1Active Low
0x0002DegaussActive Low
0x0004Service 1Active Low
0x0008ResetActive Low
0x0010Service 4Active Low
0x0020Start 2Active Low
0x0040Start 3Active Low
0x0080CustomActive Low
0xff00Start 4Active Low
0x700006-0x7000072Device Read/Writewatchdog, watchdog_timer_device, reset16_r, reset16_w
0x700100-0x7001012Writestaraudi_lamps1_w (// Lamps 1)
0x700180-0x70018F16Device Read/Write 8-bitrtc, upd4992_device, read, write, 0x00ff
0x700200-0x7002012Writestaraudi_lamps2_w (// Lamps 2)
0x700300-0x7003012Read PortDSW1 (// DSW 1)
0x0002OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0000OffActive High
0x0020OnActive High
0xff00UnknownActive Low
0x700300-0x70030F16Writesound_bank_w (// Samples Banks)
0x700302-0x7003032Read PortDSW2 (// DSW 2)
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xff00UnknownActive Low
0x800000-0x9FFFFF2097152Device Read/Writeflash, intelfsh16_device, read, write
0xB00000-0xB03FFF16384Device Read/Writex1snd, x1_010_device, word_r, word_w (// Sound)
0xC00000-0xC3FFFF262144RAM, Sharedspriteram (// Sprites)
0xC40000-0xC4FFFF65536RAM Device Write, Sharedpalette, palette_device, write, palette (// Palette)
0xC50000-0xC5FFFF65536RAM(// cleared)
0xC60000-0xC6003F64Write, Sharedvregs_w, vregs (// Video Registers)
0xFFFC00-0xFFFFFF1024Device Read/Writetmp68301, tmp68301_device, regs_r, regs_w (// TMP68301 Registers)
 

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:flash
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFFF2097152lh28f016sat_flash.u08CRC(002255bd)
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