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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.
Bombs Away (Jaleco, 1988)
Memory Area:bombsa_main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384ROM Bankmainbank
0xC000-0xCFFF4096RAM
0xD000-0xD1FF512RAM
0xD0001Device Writesoundlatch, generic_latch_8_device, write (// confirmed)
0xD0011Writebombsa_flipscreen_w
0xD0021Read/Writebankselect_r, bombsa_bankselect_w
0xD0031Read/Writevram_page_select_r, vram_page_select_w
0xD0051Writebombsa_unknown_w (// ?)
0xD200-0xD7FF1536RAM, Sharedspriteram
0xD800-0xDFFF2048RAM
0xE000-0xFFFF8192Devicevrambank, address_map_bank_device, amap8
Memory Area:bombsa_sound_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xC000-0xC7FF2048RAM
0xE0001Device Readsoundlatch, generic_latch_8_device, read
0xF0001Write Only(// Is this a confirm of some sort?)
Memory Area:bombsa_soundport_map
Address RangeLengthFunctionDescription
0x0000-0x00012Device Read/Writeym1, ym2203_device, read, write
0x0080-0x00812Device Read/Writeym2, ym2203_device, read, write
Memory Area:bombsa_vrambank_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192RAM Write, Sharedbg_videoram_w, bg_videoram
0x20001Read PortSYSTEM
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020Service 1Active Low
0x0040Coin 2Active Low
0x0080Coin 1Active Low
0x20011Read PortP1
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x20021Read PortP2
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x20031Read PortDSW1
0x00c0Coin_AActive High
0x00001C_1CActive High
0x00402 Coins 1 Credit/4 Coins 3 CreditsActive High
0x00803C_1CActive High
0x00c01C_4CActive High
0x20041Read PortDSW2
0x2308-0x230C5RAM, Sharedbg_control
0x2800-0x2FFF2048RAM Write, Sharedfg_videoram_w, fg_videoram
0x3000-0x31FF512RAM Write, Sharedsprite_col_w, palette_ram_sp
0x3200-0x33FF512RAM Write, Sharedbg_col_w, palette_ram_bg
0x3400-0x35FF512RAM Write, Sharedtx_col_w, palette_ram_tx
 

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
0x0000-0x7FFF327681.3aCRC(92801404) (Fluke: 08BB)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF655362.4pCRC(bd972ff4) (Fluke: CD8D)
0x10000-0x1FFFF655363.4sCRC(9a8a8a97) (Fluke: 16C0)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF655368.2lCRC(3391c769) (Fluke: D19F)
0x10000-0x1FFFF655369.2mCRC(5b315976) (Fluke: 49FA)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF327687.4fCRC(400114b9) (Fluke: 4BE8)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF327684.7aCRC(0191f6a7) (Fluke: 8B2E)
0x10000-0x17FFF327685.7cCRC(095c451a) (Fluke: E40F)
0x20000-0x2FFFF655366.7dCRC(89f9dc0f) (Fluke: BA57)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF51282s131.7lCRC(6a7d13c0) (Fluke: A870)
0x0200-0x05FF102482s137.3tCRC(59e44236) (Fluke: 1B48)
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