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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.
Varia Metal (Excellent System, 1995)
Memory Area:vmetal_map
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM(// ROM)
0x100000-0x11FFFF131072RAM Write, Sharedmetro_vram_0_w, vram_0 (// Layer 0)
0x120000-0x13FFFF131072RAM Write, Sharedmetro_vram_1_w, vram_1 (// Layer 1)
0x140000-0x15FFFF131072RAM Write, Sharedmetro_vram_2_w, vram_2 (// Layer 2)
0x160000-0x16FFFF65536Readmetro_bankedrom_r (// Banked ROM)
0x170000-0x171FFF8192RAM(// ???)
0x172000-0x173FFF8192RAM Device Write, Sharedpalette, palette_device, write, palette (// Palette)
0x174000-0x174FFF4096RAM, Sharedspriteram (// Sprites)
0x178000-0x1787FF2048RAM, Sharedtiletable (// Tiles Set)
0x178840-0x17884D14Write, Sharedmetro_blitter_w, blitter_regs (// Tiles Blitter)
0x178860-0x17886B12Write, Sharedmetro_window_w, window (// Tilemap Window)
0x178870-0x17887B12Write Only, Sharedscroll (// Scroll)
0x178880-0x1788812Write NOP(// ? CRT)
0x178890-0x1788912Write NOP(// ? CRT)
0x1788A2-0x1788A32Read/Writemetro_irq_cause_r, metro_irq_cause_w (// IRQ Cause / IRQ Acknowledge)
0x1788A4-0x1788A52Write Only, Sharedirq_enable (// IRQ Enable)
0x1788AA-0x1788AB2Write Only, Sharedrombank (// Rom Bank)
0x1788AC-0x1788AD2Write Only, Sharedscreenctrl (// Screen Control)
0x179700-0x17971320Write Only, Sharedvideoregs (// Video Registers)
0x200000-0x2000012Read Port, Write 8-bitP1_P2, vmetal_control_w, 0x00ff
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040Button 3Active Low
0x0080Start 2Active Low
0x0100Joystick UpActive Low
0x0200Joystick DownActive Low
0x0400Joystick LeftActive Low
0x0800Joystick RightActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000Button 3Active Low
0x8000Start 1Active Low
0x200002-0x2000032Read PortSYSTEM
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004TiltActive Low
0x0008Service 1Active Low
0x0010Service 2Active Low
0xffe0UnusedActive Low
0x300000-0x31FFFF131072Readbalcube_dsw_r (// DSW x 3)
0x400000-0x4000012Device Read/Write 8-bitoki, okim6295_device, read, write, 0x00ff
0x400002-0x4000032Device Write 8-bitoki, okim6295_device, write, 0x00ff
0x500000-0x50000D14Write 8-bitvmetal_es8712_w, 0x00ff
0xF00000-0xF0FFFF65536RAM, Mirror0x0f0000 (// RAM (mirrored))
 

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:essnd
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFFF20971527.u12CRC(a88c52f1) (Fluke: D854)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF5242888.u9CRC(c14c001c) (Fluke: 9CBC)
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