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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.
Skimaxx (Kyle Hodgetts / ICE, 1996)
Memory Area:68030_1_map
Address RangeLengthFunctionDescription
0x0000-0x1FFFFF2097152ROM
0x10000000-0x100000034Writeskimaxx_sub_ctrl_w
0x10100000-0x1010000F16Device Read/Write 16-bittms, tms34010_device, host_r, host_w, 0x0000ffff
0x10180000-0x1018FFFF65536RAM, Sharedshare1 (// above 10188000 accessed at level end (game bug?))
0x20000000-0x200000034Read NOP(// watchdog_r?)
0x20000010-0x200000134Device Read/Write 8-bitoki1, okim6295_device, read, write, 0x00ff (// left)
0x20000014-0x200000174Device Read/Write 8-bitoki2, okim6295_device, read, write, 0x00ff (// left)
0x20000018-0x2000001B4Device Read/Write 8-bitoki3, okim6295_device, read, write, 0x00ff (// right)
0x2000001C-0x2000001F4Device Read/Write 8-bitoki4, okim6295_device, read, write, 0x00ff (// right)
0x20000020-0x200000234Readskimaxx_unk1_r (// units linking?)
0x20000024-0x200000274Writeskimaxx_unk1_w (// "")
0x20000040-0x200000434RAM(// write)
0x20000044-0x200000474Read PortDSW
0x000512Active High
0x000417Active High
0x000325Active High
0x000233Active High
0x000150Active High
0x0007100Active High
0x0006200Active High
0x0000Free_PlayActive High
0x00080Active High
0x00001Active High
0x00002Active High
0x00104Active High
0x00208Active High
0x003010Active High
0x004012Active High
0x005015Active High
0x006020Active High
0x007030Active High
0x008050 sActive High
0x000060 sActive High
0x20000048-0x2000004B4Read PortCOIN
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004Button 2Active Low
0x0008Coin 1Active Low
0x0010Coin 2Active Low
0x0020Start 1Active Low
0x0040UnknownActive Low
0x0080Button 1Active Low
0x2000004C-0x2000004F4Readunk_r (// bit 7, bit 0)
0x20000050-0x200000578Read, Write NOPskimaxx_analog_r, (// read (0-1f), write motor?)
0xFFFC0000-0xFFFDFFFF131072RAM, Mirror0x00020000
Memory Area:68030_2_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFFF4194304ROM
0x20000000-0x2007FFFF524288Readskimaxx_blitter_r (// do blit)
0x30000000-0x3000000F16Write, Sharedskimaxx_blitter_w, blitter_regs
0x40000000-0x400000034Write, Sharedskimaxx_fpga_ctrl_w, fpga_ctrl
0x50000000-0x5007FFFF524288RAM Bankbank1 (// background ram allocated here at video_start (skimaxx_bg_buffer_back/front))
0xFFFC0000-0xFFFCFFFF65536RAM, Sharedshare1
0xFFFE0000-0xFFFEFFFF65536RAM, Sharedshare1 (// HACK)
0xFFFE0010-0xFFFEFFFF65520RAM(// HACK)
0xFFFF0000-0xFFFFFFFF65536RAM
Memory Area:tms_program_map
Address RangeLengthFunctionDescription
0x0000-0x100FF65792RAM
0x8000-0x3FFFF229376RAM
0x50000-0x5FFFF65536RAM
0x220000-0x3FFFFF1966080RAM, Sharedfg_buffer
0x2000000-0x200000F16RAM
0x2100000-0x210000F16RAM
0x4000000-0x47FFFFF8388608ROM, Regiontmsgfx, 0
0xC0000000-0xC00001FF512Device Read/Writetms, tms34010_device, io_register_r, io_register_w
0xFF800000-0xFFFFFFFF8388608ROM, Regiontms, 0
 

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:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288main2_0.u3CRC(24d8c6ad) (Fluke: 54A1)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288main2_0.u2CRC(c84b3c46) (Fluke: C8AB)
Memory Area:oki3
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288main2_0.u5CRC(e2ba07ad) (Fluke: E0EC)
Memory Area:oki4
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288main2_0.u4CRC(c84b3c46) (Fluke: C8AB)
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