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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.
Wall Crash (Midcoin, 1984)
Memory Area:wallc_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x83FF1024RAM Write, Mirror, Sharedwallc_videoram_w, 0xc00, videoram (/* 2114, 2114 */)
0xA000-0xA3FF1024RAM(/* 2114, 2114 */)
0xB0001Write NOP
0xB0001Read PortDSW1
0x0003LivesActive High
0x00035Active High
0x00024Active High
0x00013Active High
0x00002Active High
0x000cBonus_LifeActive High
0x000c100K/200K/400K/800KActive High
0x000880K/160K/320K/640KActive High
0x000460K/120K/240K/480KActive High
0x0000OffActive High
0x0010NormalActive High
0x0000MoreActive High
0x0060SlowActive High
0x0040NormalActive High
0x0020FastActive High
0x0000Super FastActive High
0x0080Free Play With Level SelectActive High
0x0000NormalActive High
0xB1001Writewallc_coin_counter_w
0xB2001Write NOP
0xB2001Read PortSYSTEM
0x0001Button 2Active Low
0x0002UnknownActive Low
0x0004Service 1Active Low
0x0008Button 1Active Low
0x0010Coin 1Active Low
0x0020Coin 2Active Low
0x0040Coin 3Active Low
0x0080Start 1Active Low
0xB4001Read PortDIAL
0x00ffDialActive High
0xB5001Device Writeaysnd, ay8910_device, address_w
0xB6001Device Writeaysnd, ay8910_device, data_w
0xB6001Read PortDSW2
0x0003Coin_AActive High
0x00032C_1CActive High
0x00001C_1CActive High
0x00011C_2CActive High
0x00021C_5CActive High
0x000cCoin_BActive High
0x000c2C_1CActive High
0x00001C_1CActive High
0x00041C_2CActive High
0x00081C_5CActive High
0x00302C_1CActive High
0x00001C_1CActive High
0x00101C_2CActive High
0x00201C_5CActive 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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096wc1.e3CRC(ca5c4b53) (Fluke: 24A7)
0x1000-0x1FFF4096wc2.e2CRC(b7f52a59) (Fluke: A4AE)
0x2000-0x2FFF4096wc3.e1CRC(f6854b3a) (Fluke: 9428)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192wac05.h7CRC(ab6e472e) (Fluke: 7104)
0x2000-0x3FFF8192wac1-52.h6CRC(988eaa6d) (Fluke: 2C23)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F3274s288.c2CRC(83e3e293) (Fluke: D593)
0x0000-0x001F3274s288.c2CRC(83e3e293) (Fluke: D593)
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