Memory Area:audiocpu
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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.
Crossbow (Exidy, 1983)
Memory Area:exidy440_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192RAM, Sharedimageram
0x2000-0x209F160RAM Write, Sharedexidy440_spriteram_w, spriteram
0x20A0-0x29FF2400RAM
0x2A00-0x2AFF256Read/Writeexidy440_videoram_r, exidy440_videoram_w
0x2B001Readexidy440_vertical_pos_r
0x2B011Read/Writeexidy440_horizontal_pos_r, exidy440_interrupt_clear_w
0x2B021RAM, Sharedscanline
0x2B031Read Port, WriteIN0, exidy440_control_w
0x0001UnknownActive Low
0x0002Button 1Active Low
0x00082Active High
0x000c3Active High
0x00044Active High
0x00005Active High
0x0000EasyActive High
0x0030NormalActive High
0x0020HardActive High
0x0010HardestActive High
0x0040SpecialActive Low
0x0080SpecialActive Low
0x2C00-0x2DFF512Read/Writeexidy440_paletteram_r, exidy440_paletteram_w
0x2E00-0x2E1F32RAM Writesound_command_w
0x2E20-0x2E3F32Read/Writeexidy440_input_port_3_r, exidy440_input_port_3_w
0x2E40-0x2E5F32Read NOP, Writeexidy440_coin_counter_w (/* read: clear coin counters I/O2 */)
0x2E60-0x2E7F32Read Port, Write NOPIN1,
0x0070UnknownActive Low
0x0080OffActive High
0x0000OnActive High
0x2E80-0x2E9F32Read Port, Write NOPIN2,
0x0001Start 1Active Low
0x00feUnknownActive Low
0x2EA0-0x2EBF32Read, Write NOPsound_command_ack_r,
0x2EC0-0x2EFF64Read/Write NOP
0x3000-0x3FFF4096RAM
0x4000-0x7FFF16384Read Bank, Writebank1, bankram_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.   
0x8000-0x9FFF8192xbl-2.1aCRC(bd53ac46) (Fluke: DC4C)
0xA000-0xBFFF8192xbl-2.3aCRC(703e1376) (Fluke: ED39)
0xC000-0xDFFF8192xbl-2.4aCRC(52c5daa1) (Fluke: 7162)
0xE000-0xFFFF8192xbl-2.6aCRC(f42a68f7) (Fluke: FB83)
0x10000-0x11FFF8192xbl-1.1eCRC(2834258e) (Fluke: AC52)
0x12000-0x13FFF8192xbl-1.3eCRC(587b186c) (Fluke: AAD1)
0x14000-0x15FFF8192xbl-1.4eCRC(23fbfa8e) (Fluke: 01F9)
0x16000-0x17FFF8192xbl-1.6eCRC(a3ebcc92) (Fluke: 9FD7)
0x18000-0x19FFF8192xbl-1.7eCRC(945b3a68) (Fluke: B8FF)
0x1A000-0x1BFFF8192xbl-1.8eCRC(0d1c5d24) (Fluke: 0FD5)
0x1C000-0x1DFFF8192xbl-1.10eCRC(ca30788b) (Fluke: 0565)
0x1E000-0x1FFFF8192xbl-1.11eCRC(6661c5ee) (Fluke: E848)
0x20000-0x21FFF8192xbl-1.1dCRC(a1416191) (Fluke: C37D)
0x22000-0x23FFF8192xbl-1.3dCRC(7322b5e1) (Fluke: 0E0C)
0x24000-0x25FFF8192xbl-1.4dCRC(425d51ef) (Fluke: DB6C)
0x26000-0x27FFF8192xbl-1.6dCRC(c923c9f5) (Fluke: 1AF2)
0x28000-0x29FFF8192xbl-1.7dCRC(46cdf117) (Fluke: 5288)
0x2A000-0x2BFFF8192xbl-1.8dCRC(62bad9b6) (Fluke: C953)
0x2C000-0x2DFFF8192xbl-1.10dCRC(d4aaa382) (Fluke: C7B8)
0x2E000-0x2FFFF8192xbl-1.11dCRC(efc77790) (Fluke: 567D)
0x30000-0x31FFF8192xbl-1.1cCRC(dbbd35cb) (Fluke: 6DF0)
0x32000-0x33FFF8192xbl-1.3cCRC(f011f98d) (Fluke: 2E28)
0x34000-0x35FFF8192xbl-1.4cCRC(1257b947) (Fluke: 29D8)
0x36000-0x37FFF8192xbl-1.6cCRC(48da9081) (Fluke: 6954)
0x38000-0x39FFF8192xbl-1.7cCRC(8d4d4855) (Fluke: 692C)
0x3A000-0x3BFFF8192xbl-1.8cCRC(4c52b85a) (Fluke: 552D)
0x3C000-0x3DFFF8192xbl-1.10cCRC(5986130b) (Fluke: D09C)
0x3E000-0x3FFFF8192xbl-1.11cCRC(163a6ae0) (Fluke: E1F4)
0x40000-0x41FFF8192xbl-1.1bCRC(36ea0269) (Fluke: CC05)
0x42000-0x43FFF8192xbl-1.3bCRC(4a03c2c9) (Fluke: 7D02)
0x44000-0x45FFF8192xbl-1.4bCRC(7e21c624) (Fluke: AA38)
Address RangeLengthLabel/LocationDescription
0xE000-0xFFFF8192xba-11.1hCRC(1b61d0c1) (Fluke: C91E)
Memory Area:cvsd
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192xba-1.2kCRC(b6e57685) (Fluke: 7DAE)
0x2000-0x3FFF8192xba-1.2lCRC(2c24cb35) (Fluke: 2174)
0x4000-0x5FFF8192xba-1.2mCRC(f3a4f2be) (Fluke: 3B36)
0x6000-0x7FFF8192xba-1.2nCRC(15cf362d) (Fluke: D568)
0x8000-0x9FFF8192xba-1.2pCRC(56f53af9) (Fluke: 381B)
0xA000-0xBFFF8192xba-1.2rCRC(3d8277b0) (Fluke: AA1E)
0xC000-0xDFFF8192xba-1.2sCRC(14dd8993) (Fluke: 8B3E)
0xE000-0xFFFF8192xba-1.2tCRC(dfa783e4) (Fluke: 59A7)
0x10000-0x11FFF8192xba-1.1kCRC(4f01f9e6) (Fluke: 374B)
0x12000-0x13FFF8192xba-1.1lCRC(fb119acf) (Fluke: 5A20)
0x14000-0x15FFF8192xba-1.1mCRC(18d097ac) (Fluke: 339B)
0x16000-0x17FFF8192xba-1.1nCRC(2e855698) (Fluke: B708)
0x18000-0x19FFF8192xba-1.1pCRC(788bfac6) (Fluke: 8023)
0x1A000-0x1BFFF8192xba-1.1rCRC(b8ec43b3) (Fluke: A00B)
0x1C000-0x1DFFF8192xba-1.1sCRC(c9ead134) (Fluke: 881A)
0x1E000-0x1FFFF8192xba-1.1tCRC(5f41c282) (Fluke: FD70)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256xbl.12hCRC(375c8bfc) (Fluke: 8154)
0x0100-0x01FF256xbl.9hCRC(2e7d5562) (Fluke: 7F47)
0x0200-0x02FF256xbl.2hCRC(b078c1e4) (Fluke: 5DE2)
0x0300-0x031F32xml-3k_mmi_6331.binCRC(afa289d1)
0x0400-0x04FF256xbl.4kCRC(31a9549c) (Fluke: 633B)
0x0500-0x05FF256xbl.5kCRC(1379bb2a) (Fluke: 55D0)
0x0600-0x06FF256xbl.6kCRC(588969f7) (Fluke: 2BA3)
0x0700-0x07FF256xbl.7kCRC(eda360b8) (Fluke: 1C38)
0x0800-0x08FF256xbl.8kCRC(9d434cb1) (Fluke: 8E17)
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