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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.
Vigilante (Irem (Data East license), 1988)
Memory Area:sound_io_map
Address RangeLengthFunctionDescription
0x0000-0x00012Device Read/Writeymsnd, ym2151_device, read, write
0x0080-0x00812Device Read, Device Writesoundlatch, generic_latch_8_device, read, m72, m72_audio_device, vigilant_sample_addr_w (/* STL / STH */)
0x00821Device Writem72, m72_audio_device, sample_w (/* COUNT UP */)
0x00831Device Writem72, m72_audio_device, sound_irq_ack_w (/* IRQ clear */)
0x00841Device Readm72, m72_audio_device, sample_r (/* S ROM C */)
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xF000-0xFFFF4096RAM
Memory Area:vigilant_io_map
Address RangeLengthFunctionDescription
0x00001Read Port, Device WriteIN0, m72, m72_audio_device, sound_command_byte_w (/* SD */)
0x00011Read Port, WriteIN1, vigilant_out2_w (/* OUT2 */)
0x00021Read PortIN2
0x00031Read PortDSW1
0x00041Read Port, WriteDSW2, bank_select_w (/* PBANK */)
0x0080-0x00812Writevigilant_horiz_scroll_w (/* HSPL, HSPH */)
0x0082-0x00832Writevigilant_rear_horiz_scroll_w (/* RHSPL, RHSPH */)
0x00841Writevigilant_rear_color_w (/* RCOD */)
Memory Area:vigilant_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384ROM Bankbank1 (/* Fallthrough */)
0xC020-0xC0DF192RAM, Sharedspriteram
0xC800-0xCFFF2048RAM Write, Sharedpaletteram_w, paletteram
0xD000-0xDFFF4096RAM, Sharedvideoram
0xE000-0xEFFF4096RAM
 

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
0x0000-0xFFFF65536VG_B-4F-.ic34CRC(01579d20) (Fluke: 5C71)
0x10000-0x1FFFF65536VG_B-4J-.ic35CRC(4f5872f0) (Fluke: 6A75)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536VG_B-6L-.ic62CRC(fbe9552d)
0x10000-0x1FFFF65536VG_B-6K-.ic61CRC(ae09d5c0)
0x40000-0x4FFFF65536VG_B-6P-.ic64CRC(afb77461)
0x50000-0x5FFFF65536VG_B-6N-.ic63CRC(5065cd35)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536VG_B-1D-.ic2CRC(81b1ee5c) (Fluke: C63B)
0x10000-0x1FFFF65536VG_B-1F-.ic3CRC(d0d33673) (Fluke: E24E)
0x20000-0x2FFFF65536VG_B-1H-.ic4CRC(aae81695) (Fluke: 43F4)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768VG_A-8H-G.ic55CRC(9444c04e)
0x10000-0x1FFFF65536VG_A-8L-.ic57CRC(7f95799b) (Fluke: 6706)
0x10000-0x1FFFF65536VG_A-8L-.ic57CRC(7f95799b) (Fluke: 6706)
0x10000-0x1FFFF65536VG_A-8L-.ic57CRC(7f95799b) (Fluke: 6706)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x0116279VG_B-8R.ic90CRC(df368a7a)
0x0000-0x0116279VG_B-8R.ic90CRC(df368a7a)
0x0000-0x0116279VG_B-8R.ic90CRC(df368a7a)
0x0200-0x0316279VG_B-4M.ic38CRC(dbca4204)
0x0200-0x0316279VG_B-4M.ic38CRC(dbca4204)
0x0200-0x0316279VG_B-4M.ic38CRC(dbca4204)
0x0400-0x0516279VG_B-1B.ic1CRC(922e5167)
0x0400-0x0516279VG_B-1B.ic1CRC(922e5167)
0x0400-0x0516279VG_B-1B.ic1CRC(922e5167)
Memory Area:samples
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536VG_A-4D-.ic26CRC(9b85101d) (Fluke: 1646)
0x0000-0xFFFF65536VG_A-4D-.ic26CRC(9b85101d) (Fluke: 1646)
0x0000-0xFFFF65536VG_A-4D-.ic26CRC(9b85101d) (Fluke: 1646)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536VG_A-5J-.ic37CRC(10582b2d) (Fluke: 4BEC)
0x0000-0xFFFF65536VG_A-5J-.ic37CRC(10582b2d) (Fluke: 4BEC)
0x0000-0xFFFF65536VG_A-5J-.ic37CRC(10582b2d) (Fluke: 4BEC)
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