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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.
Sky Fox (Jaleco (Nichibutsu USA license), 1987)
Memory Area:skyfox_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xC000-0xCFFF4096RAM
0xD000-0xD3FF1024RAM, Sharedspriteram
0xD400-0xDFFF3072RAM(// ?)
0xE0001Read PortINPUTS
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick RightActive Low
0x0008Joystick LeftActive Low
0x0010Button 2Active Low
0x0020Button 1Active Low
0x0040Start 1Active Low
0x0080Start 2Active Low
0xE0011Read PortDSW0
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0018Bonus_LifeActive High
0x000020KActive High
0x000830KActive High
0x001040KActive High
0x001850KActive High
0x0020DifficultyActive High
0x0020MediumActive High
0x0000HardActive High
0x0040Flip_ScreenActive High
0x0040OffActive High
0x0000OnActive High
0x0080CabinetActive High
0x0000UprightActive High
0x0080CocktailActive High
0xE0021Read PortDSW1
0x0001CustomActive Low
0x000eCoinageActive High
0x000e5C_1CActive High
0x000a4C_1CActive High
0x00063C_1CActive High
0x00022C_1CActive High
0x00001C_1CActive High
0x00041C_2CActive High
0x00081C_3CActive High
0x000c1C_4CActive High
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xE008-0xE00F8Writeskyfox_vregs_w
0xF0011Read PortDSW2
0x0007LivesActive High
0x00001Active High
0x00012Active High
0x00023Active High
0x00034Active High
0x00045Active High
0x00055Active High
0x00065Active High
0x0007Infinite (Cheat)Active High
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
Memory Area:skyfox_sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0xA000-0xA0012Device Read/Writeym1, ym2203_device, read, write
0xB0001Device Readsoundlatch, generic_latch_8_device, read
0xC000-0xC0012Device Read/Writeym2, ym2203_device, read, 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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768skyfox9.binCRC(0b283bf5) (Fluke: 5D16)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536skyfox3.binCRC(3a17a929) (Fluke: 0F40)
0x10000-0x1FFFF65536skyfox4.binCRC(358053bb) (Fluke: 3A81)
0x20000-0x2FFFF65536skyfox5.binCRC(c1215a6e) (Fluke: 3565)
0x30000-0x3FFFF65536skyfox6.binCRC(cc37e15d) (Fluke: C188)
0x40000-0x4FFFF65536skyfox7.binCRC(fa2ab5b4) (Fluke: 1D4C)
0x50000-0x5FFFF65536skyfox8.binCRC(0e3edc49) (Fluke: 7E2B)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768skyfox10.binCRC(19f58f9c) (Fluke: 09B3)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768skyfox1.binCRC(b4d4bb6f) (Fluke: CD3F)
0x8000-0xFFFF32768skyfox2.binCRC(e15e0263) (Fluke: 05D0)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256sfoxrprm.binCRC(79913c7f) (Fluke: 6A72)
0x0100-0x01FF256sfoxgprm.binCRC(fb73d434) (Fluke: 9620)
0x0200-0x02FF256sfoxbprm.binCRC(60d2ab41) (Fluke: B785)
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