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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.
Music Ball (Tecfri / Desystem S.A., 1988)
Memory Area:main_cpu_io_map
Address RangeLengthFunctionDescription
0x00001Read PortDSW2
0x00101Read PortDSW1
0x00201Read PortP1
0x00301Read PortP2
0x00401Writecoincounter_w
0x00501Writemaincpu_50_w
Memory Area:main_cpu_map
Address RangeLengthFunctionDescription
0x0000-0xDBFF56320ROM
0xDC00-0xDFFF1024RAM, Sharedshare1 (// shared with SOUND)
0xE000-0xE1FF512RAM Write, Sharedbackground_videoram_w, bg_videoram
0xE800-0xEFFF2048RAM Write, Sharedforeground_videoram_w, fg_videoram
0xF000-0xF5FF1536RAM Device Write, Sharedpalette, palette_device, write, palette
0xF600-0xFEFF2304RAM
0xFF00-0xFFFF256RAM, Sharedspriteram
Memory Area:sound_cpu_io_map
Address RangeLengthFunctionDescription
0x0000-0x00012Device Read/Writeymsnd, ym3812_device, read, write
0x00401Writeleds_output_block
0x00801Writeleds_start_block
0x00821Write NOP(// ?)
0x00C11Writeleds_shift_bit
Memory Area:sound_cpu_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0xD800-0xDBFF1024RAM
0xDC00-0xDFFF1024RAM, Sharedshare1 (// shared with MAIN CPU)
 

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
0x0000-0x7FFF3276802.binCRC(b7d3840d)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF3276810.binCRC(5afd3c42),chars
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF3276809.binCRC(dcde4233),bg tiles
0x8000-0xFFFF3276805.binCRC(e1eec437)
0x10000-0x17FFF3276808.binCRC(7e7af52b)
0x18000-0x1FFFF3276804.binCRC(bf931a33)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF3276801.binCRC(412298a2)
0x8000-0xFFFF3276803.binCRC(fdf14446)
Memory Area:sprites
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF3276807.binCRC(310e1e23),sprites
0x8000-0xFFFF3276806.binCRC(2e7772f8)
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