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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.
Air Raid (Seibu Kaihatsu, 1987)
Memory Area:airraid_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384ROM Bank, Write NOPbank1, (// rld result write-back)
0xC0001Read PortIN0
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC0011Read PortIN1
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC0021Read PortIN2
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010Start 1Active Low
0x0020Start 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC0031Read PortDSW2
0x0003DifficultyActive High
0x0003EasyActive High
0x0002MediumActive High
0x0001HardActive High
0x0000HardestActive High
0x000cBonus_LifeActive High
0x000c2k 10k 20kActive High
0x00085k 20k 40kActive High
0x00046k 30k 60kActive High
0x00007k 40k 80kActive High
0x0030LivesActive High
0x00201Active High
0x00102Active High
0x00303Active High
0x00004Active High
0xC0041Read PortDSW1
0x00011Active High
0x00002Active High
0x0004Demo_SoundsActive High
0x0004OffActive High
0x0000OnActive High
0x0038CoinageActive High
0x00005C_1CActive High
0x00204C_1CActive High
0x00103C_1CActive High
0x00302C_1CActive High
0x00381C_1CActive High
0x00181C_2CActive High
0x00281C_3CActive High
0x00081C_5CActive High
0xC5001Writecshooter_c500_w
0xC7001Writecshooter_c700_w
0xD000-0xD7FF2048RAM Device Write, Sharedairraid_vid, airraid_video_device, txram_w, txram
0xD800-0xD8FF256RAM Device Write, Sharedpalette, palette_device, write, palette
0xDA00-0xDAFF256RAM Device Write, Sharedpalette, palette_device, write_ext, palette_ext
0xDC00-0xDC0F16RAM Device Write, Sharedairraid_vid, airraid_video_device, vregs_w, vregs
0xDC111Writebank_w
0xDE00-0xDE0F16Read/Writeseibu_sound_comms_r,seibu_sound_comms_w
0xE000-0xFDFF7680RAM, Sharedmainram
0xFE00-0xFFFF512RAM, Sharedsprite_ram
Memory Area:airraid_sound_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192Device Readsei80bu, sei80bu_device, data_r
0x2000-0x27FF2048RAM
0x40001Device Writeseibu_sound, seibu_sound_device, pending_w
0x40011Device Writeseibu_sound, seibu_sound_device, irq_clear_w
0x40021Device Writeseibu_sound, seibu_sound_device, rst10_ack_w
0x40031Device Writeseibu_sound, seibu_sound_device, rst18_ack_w
0x40071Device Writeseibu_sound, seibu_sound_device, bank_w
0x4008-0x40092Device Read/Writeseibu_sound, seibu_sound_device, ym_r, ym_w
0x4010-0x40112Device Readseibu_sound, seibu_sound_device, soundlatch_r
0x40121Device Readseibu_sound, seibu_sound_device, main_data_pending_r
0x40131Read PortCOIN
0x0001Coin 1Active High
0x0002Coin 2Active High
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x4018-0x40192Device Writeseibu_sound, seibu_sound_device, main_data_w
0x401B1Device Writeseibu_sound, seibu_sound_device, coin_w
0x8000-0xFFFF32768ROM
 

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:airraid_vid:bg_clut
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256bg_clut
Memory Area:airraid_vid:fg_clut
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256fg_clut
Memory Area:airraid_vid:spr_clut
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256spr_clut
Memory Area:airraid_vid:tx_gfx
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF25663s281.d16CRC(0b8b914b)
0x0000-0x1FFF81923.13eCRC(672ec0e8) (Fluke: A9D1)
Memory Area:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF81925.6fCRC(30be398c) (Fluke: 9EC3)
0x8000-0xFFFF327684.7fCRC(3cd715b4) (Fluke: 6560)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF327681.16jCRC(7ac2cedf) (Fluke: 8AAD)
Memory Area:maindata
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF655362.19jCRC(842ae6c2) (Fluke: 6C53)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF2566308.a13
0x0000-0x01FF512pr.c19
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