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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.
Gaia Crusaders (Noise Factory, 1999)
Memory Area:gaia_map
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM(// ROM)
0x100000-0x10FFFF65536RAM(// RAM)
0x300000-0x3000034Device Read/Write 8-bitymz, ymz280b_device, read, write, 0x00ff (// YMZ280)
0x400000-0x407FFF32768RAM, Sharedspriteram.0 (// Sprite bank 1)
0x408000-0x40FFFF32768RAM, Sharedspriteram_2.0 (// Sprite bank 2)
0x500000-0x507FFF32768RAM Write, Sharedcave_vram_0_w, vram.0 (// Layer 0)
0x508000-0x50FFFF32768RAM(// More Layer 0, Tested but not used?)
0x600000-0x607FFF32768RAM Write, Sharedcave_vram_1_w, vram.1 (// Layer 1)
0x608000-0x60FFFF32768RAM(// More Layer 1, Tested but not used?)
0x700000-0x707FFF32768RAM Write, Sharedcave_vram_2_w, vram.2 (// Layer 2)
0x708000-0x70FFFF32768RAM(// More Layer 2, Tested but not used?)
0x800000-0x80007F128Write Only, Sharedvideoregs.0 (// Video Regs)
0x800000-0x8000078Readcave_irq_cause_r (// IRQ Cause)
0xC00000-0xC0FFFF65536RAM, Sharedpaletteram.0 (// Palette)
0xD00010-0xD000112Writegaia_coin_lsb_w (// Coin counter only)
0xD00010-0xD000112Read PortIN0 (// Inputs)
0xD00012-0xD000132Read PortIN1 (// Inputs)
0xD00014-0xD000152Device Writewatchdog, watchdog_timer_device, reset16_w (// Watchdog?)
0xD00014-0xD000152Read PortDSW (// Dips)
0x0001Flip_ScreenActive High
0x0001OffActive High
0x0000OnActive High
0x0002Demo_SoundsActive High
0x0000OffActive High
0x0002OnActive High
0x0004LanguageActive High
0x0000EnglishActive High
0x0004JapaneseActive High
0x0038CoinageActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00202C_1CActive High
0x00002 Coins/1 Credit (1 to continue)Active High
0x00381C_1CActive High
0x00182C_3CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x0040Free_PlayActive High
0x0040OffActive High
0x0000OnActive High
0x0080Allow_ContinueActive High
0x0000OffActive High
0x0080OnActive High
0x0300LivesActive High
0x01001Active High
0x00002Active High
0x03003Active High
0x02004Active High
0x0400Bonus_LifeActive High
0x0000OffActive High
0x0400150k/300kActive High
0x0400150k/350kActive High
0x0400150k/350kActive High
0x0400150k/400kActive High
0x0400150k/400kActive High
0x0400150k/400kActive High
0x0400200k/500kActive High
0x0400200k/500kActive High
0x1800+0Active High
0x1000+1Active High
0x0800+2Active High
0x0000+3Active High
0xe000DifficultyActive High
0xc000Very_EasyActive High
0xa000EasyActive High
0xe000MediumActive High
0x6000Medium_HardActive High
0x8000Hard 1Active High
0x2000Hard 2Active High
0x4000Very_HardActive High
0x0000HardestActive High
 

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:layer0
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFFF4194304bg1.989CRC(013a693d) (Fluke: 146B)
Memory Area:layer1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFFF4194304bg2.995CRC(783cc62f) (Fluke: BE99)
Memory Area:layer2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFFF4194304bg3.998CRC(bcd61d1c) (Fluke: 0E64)
Memory Area:sprites0
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFFF4194304obj1.736CRC(f4f84e5d) (Fluke: DC3B)
0x400000-0x7FFFFF4194304obj2.738CRC(15c2a9ce) (Fluke: DE57)
Memory Area:ymz
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFFF4194304snd1.447CRC(92770a52) (Fluke: 090D)
0x400000-0x7FFFFF4194304snd2.454CRC(329ae1cf) (Fluke: 5900)
0x800000-0xBFFFFF4194304snd3.455CRC(4048d64e) (Fluke: 467F)
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