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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.
Wit's (Athena (Visco license), 1989)
Memory Area:thunderl_map
Address RangeLengthFunctionDescription
0x0000-0xFFFF65536ROM(// ROM)
0x100000-0x103FFF16384Device Read/Writex1snd, x1_010_device, word_r, word_w (// Sound)
0x200000-0x2000012Write NOP(// ?)
0x300000-0x3000012Write NOP(// ?)
0x400000-0x40FFFF65536Writethunderl_protection_w (// Protection (not in wits))
0x500000-0x5000012RAM Write, Sharedseta_vregs_w, vregs (// Coin Lockout)
0x600000-0x6000034Readseta_dsw_r (// DSW)
0x700000-0x7003FF1024RAM, Sharedpaletteram (// Palette)
0xB00000-0xB000012Read PortP1 (// P1)
0xB00002-0xB000032Read PortP2 (// P2)
0xB00004-0xB000052Read PortCOINS (// Coins)
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0008TiltActive Low
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x00c0RomstarActive High
0x0080Seta U.S.AActive High
0x0040Visco (Japan Only)Active High
0x0000Athena (Japan Only)Active High
0xB00008-0xB000092Read PortP3 (// P3 (wits))
0xB0000A-0xB0000B2Read PortP4 (// P4 (wits))
0xB0000C-0xB0000D2Readthunderl_protection_r (// Protection (not in wits))
0xD00600-0xD006078RAM, Device Read/Writespritegen, seta001_device, spritectrl_r16, spritectrl_w16
0xE00000-0xE03FFF16384RAM, Device Read/Writespritegen, seta001_device, spritecode_r16, spritecode_w16 (// Sprites Code + X + Attr)
0xE04000-0xE07FFF16384RAM(// (wits))
0xFFC000-0xFFFFFF16384RAM(// RAM)
 

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:x1snd
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072un001004.12aCRC(a15ff938) (Fluke: 9F45)
0x20000-0x3FFFF131072un001003.10aCRC(3f4b9e55) (Fluke: 1B2D)
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