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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.
Wheels & Fire (TCH, 0)
Memory Area:wheelfir_main
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM
0x200000-0x20FFFF65536RAM
0x700000-0x70001F32Writewheelfir_blit_w
0x720000-0x7200012Writepal_reset_pos_w
0x720002-0x7200032Writepal_data_w
0x720004-0x7200052Write NOP(// always ffff?)
0x740000-0x7400012Device Writesoundlatch, generic_latch_16_device, write
0x760000-0x7600012Writecoin_cnt_w
0x780000-0x7800012Read PortSTEERING
0x00ffSteering WheelActive High
0x780000-0x7800056Write NOP(// Start ADC0808 conversion)
0x780002-0x7800032Read PortACCELERATOR
0x00ffAccelerator PedalActive High
0x780004-0x7800052Read PortBRAKE
0x00ffBrake PedalActive High
0x7A0000-0x7A00012Writewheelfir_scanline_cnt_w
0x7C0000-0x7C00012Read/Writewheelfir_7c0000_r, wheelfir_7c0000_w
0x7E0000-0x7E00012Read PortP1
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040Button 3Active Low
0x0080UnusedActive Low
0x0100Start 1Active Low
0x0200Start 2Active Low
0x0400Coin 1Active Low
0x0800Coin 2Active Low
0x1000TestActive Low
0x2000UnusedActive Low
0x4000UnusedActive Low
0x8000UnusedActive Low
0x7E0002-0x7E00032Read PortP2
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040Button 3Active Low
0x0080UnusedActive Low
0xff00UnusedActive Low
Memory Area:wheelfir_sub
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM
0x200000-0x20FFFF65536RAM
0x700000-0x7000012Device Writeldac, dac_word_interface, write
0x740000-0x7400012Device Writerdac, dac_word_interface, write
0x780000-0x7800012Device Readsoundlatch, generic_latch_16_device, read
 

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
0x0000-0x7FFFF524288tch4.u52CRC(fe4bc2c7) (Fluke: D8ED)
0x80000-0xFFFFF524288tch5.u53CRC(a38b9ca5) (Fluke: CE35)
0x100000-0x17FFFF524288tch6.u54CRC(2733ae6b) (Fluke: 9F3B)
0x180000-0x1FFFFF524288tch7.u55CRC(6d98f27f) (Fluke: 48B2)
0x200000-0x27FFFF524288tch8.u56CRC(22b661fe) (Fluke: 125F)
0x280000-0x2FFFFF524288tch9.u57CRC(83c66de3) (Fluke: 3DE3)
0x300000-0x37FFFF524288tch10.u58CRC(2036ed80) (Fluke: 4FB7)
0x380000-0x3FFFFF524288tch12.u59CRC(cce2e675) (Fluke: 2915)
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