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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.
Hexion (bootleg (Impeuropex Corp.), 1992)
Memory Area:hexion_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x9FFF8192ROM Bankbank1
0xA000-0xBFFF8192RAM
0xC000-0xDFFE8191Read/Writebankedram_r, bankedram_w
0xDFFF1Writebankctrl_w
0xE0001Read/Write NOP
0xE800-0xE87F128Device Read/Writek051649, k051649_device, k051649_waveform_r, k051649_waveform_w
0xE880-0xE88910Device Writek051649, k051649_device, k051649_frequency_w
0xE88A-0xE88E5Device Writek051649, k051649_device, k051649_volume_w
0xE88F1Device Writek051649, k051649_device, k051649_keyonoff_w
0xE8E0-0xE8FF32Device Read/Writek051649, k051649_device, k051649_test_r, k051649_test_w
0xF000-0xF00F16Device Read/Writek053252, k053252_device, read, write
0xF2001Device Writeoki, okim6295_device, write
0xF4001Read PortDSW1
0xF4011Read PortDSW2
0xF4021Read PortP1
0xF4031Read PortP2
0xF4401Read PortDSW3
0xF4411Read PortSYSTEM
0xF4801Writebankswitch_w
0xF4C01Writecoincntr_w
0xF5001Writegfxrom_select_w
0xF5401Device Readwatchdog, watchdog_timer_device, reset_r
Memory Area:hexionb_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x9FFF8192ROM Bankbank1
0xA000-0xBFFF8192RAM
0xC000-0xDFFE8191Read/Writebankedram_r, bankedram_w
0xDFFF1Writebankctrl_w
0xE0001Read/Write NOP
0xE800-0xE87F128Read/Write NOP(// all the code to use the k051649 is still present)
0xE880-0xE88910Read/Write NOP(// but the bootleg has an additional M6295 @ 0xf5c0 instead)
0xE88A-0xE88E5Read/Write NOP
0xE88F1Read/Write NOP
0xE8E0-0xE8FF32Read/Write NOP
0xF000-0xF00F16Device Read/Writek053252, k053252_device, read, write
0xF2001Device Writeoki, okim6295_device, write
0xF4001Read PortDSW1
0xF4011Read PortDSW2
0xF4021Read PortP1
0xF4031Read PortP2
0xF4401Read PortDSW3
0xF4411Read PortSYSTEM
0xF4801Writebankswitch_w
0xF4C01Writecoincntr_w
0xF5001Writegfxrom_select_w
0xF5401Device Readwatchdog, watchdog_timer_device, reset_r
0xF5C01Device Writeoki2, okim6295_device, write
 

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
0x0000-0x3FFFF262144hexionb.u30CRC(22ae55e3) (Fluke: 8D25)
0x40000-0x7FFFF262144hexionb.u29CRC(438f4388) (Fluke: F747)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072hexionb.u2CRC(93edc5d4)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144hexionb.u16CRC(bcc831bf) (Fluke: BAAC)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144hexionb.u18CRC(c179d315)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF25682s129.u36CRC(506eb8c6) (Fluke: 580F)
0x0100-0x01FF25682s129.u37CRC(590c4f64) (Fluke: FD43)
0x0200-0x02FF25682s129.u38CRC(5734305c) (Fluke: B60E)
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