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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.
Stagger I (Afega, 1998)
Memory Area:afega
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
0x80000-0x8001D30Write Only(//)
0x80000-0x800012Read PortIN0 (// Buttons)
0x80002-0x800032Read PortIN1 (// P1 + P2)
0x80004-0x800052Read PortDSW1 (// 2 x DSW)
0x0002Demo_SoundsActive High
0x0000OffActive High
0x0002OnActive High
0x0004UnusedActive High
0x0004OffActive High
0x0000OnActive High
0x0008UnusedActive High
0x0008OffActive High
0x0000OnActive High
0x0010UnusedActive High
0x0010OffActive High
0x0000OnActive High
0x0020UnusedActive High
0x0020OffActive High
0x0000OnActive High
0x00c0LivesActive High
0x00001Active High
0x00802Active High
0x00c03Active High
0x00405Active High
0x0300Flip_ScreenActive High
0x0300OffActive High
0x0000OnActive High
0x0200HorizontallyActive High
0x0100VerticallyActive High
0x0400UnusedActive High
0x0400OffActive High
0x0000OnActive High
0x1800DifficultyActive High
0x0800EasyActive High
0x1800NormalActive High
0x1000HardActive High
0x0000HardestActive High
0xe000CoinageActive High
0x00004C_1CActive High
0x80003C_1CActive High
0x40002C_1CActive High
0xc0003C_2CActive High
0xe0001C_1CActive High
0x20002C_3CActive High
0x60001C_2CActive High
0xa0001C_3CActive High
0x80012-0x800132Readafega_unknown_r
0x8001E-0x8001F2Writeafega_soundlatch_w (// To Sound CPU)
0x80020-0x87FFF32736Write Only(//)
0x88600-0x8BFFF14848Write Only(//)
0x8C008-0x8FFFF16376Write Only(//)
0xC0000-0xCFFFF65536RAM Write, Sharednmk16_mainram_strange_w, mainram
0xF0000-0xFFFFF65536RAM Write, Sharednmk16_mainram_strange_w, mainram
Memory Area:afega_sound_cpu
Address RangeLengthFunctionDescription
0x0000-0xEFFF61440ROM
0x00031Write NOP(// bug in sound prg?)
0x00041Write NOP(// bug in sound prg?)
0xF000-0xF7FF2048RAM(// RAM)
0xF8001Device Readsoundlatch, generic_latch_8_device, read (// From Main CPU)
0xF808-0xF8092Device Read/Writeymsnd, ym2151_device, read, write (// YM2151)
0xF80A1Device Read/Writeoki1, okim6295_device, read, write (// M6295)
 

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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF5242884.binCRC(46463d36) (Fluke: 9CC6)
0x0000-0xFFFF655361.binCRC(5d8cf28e) (Fluke: E817)
Memory Area:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF2621445CRC(e911ce33) (Fluke: 4B86)
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