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.
Memory Area:honeydol_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0x100000-0x10FFFF65536RAM, Sharedhyperpac_ram
0x200000-0x2000012Write NOP(/* ? */)
0x300000-0x3000012Writesnowbros_68000_sound_w (/* ? */)
0x400000-0x4000012Writesnowbros_irq4_ack_w (/* IRQ 4 acknowledge */)
0x500000-0x5000012Writesnowbros_irq3_ack_w (/* IRQ 3 acknowledge */)
0x600000-0x6000012Writesnowbros_irq2_ack_w (/* IRQ 2 acknowledge */)
0x800000-0x8000012Write NOP(/* ? */)
0x900000-0x9000012Read PortDSW1
0x00003C_1CActive High
0x00012C_1CActive High
0x00031C_1CActive High
0x00021C_2CActive High
0x0000OffActive High
0x0004OnActive High
0x0008OffActive High
0x0000OnActive High
0x0000OffActive High
0x0010OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0x0100Joystick UpActive Low
0x0200Joystick DownActive Low
0x0400Joystick LeftActive Low
0x0800Joystick RightActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000Button 3Active Low
0x8000CustomActive High
0x900002-0x9000032Read PortDSW2
0x0003NormalActive High
0x0002HardActive High
0x0001HarderActive High
0x0000HardestActive High
0x000cNormalActive High
0x0008FastActive High
0x0004FasterActive High
0x0000FastestActive High
0x00001Active High
0x00102Active High
0x00203Active High
0x00305Active High
0x0040OffActive High
0x0000OnActive High
0x00803Active High
0x00001Active High
0x0100Joystick UpActive Low
0x0200Joystick DownActive Low
0x0400Joystick LeftActive Low
0x0800Joystick RightActive Low
0x1000Button 1Active Low
0x2000Button 2Active Low
0x4000Button 3Active Low
0x8000UnknownActive High
0x900004-0x9000052Read PortSYSTEM
0x0100Start 1Active Low
0x0200Start 2Active Low
0x0400Coin 1Active Low
0x0800Coin 2Active Low
0x1000UnknownActive Low
0x2000TiltActive Low
0x4000Coin 3Active Low
0x8000UnknownActive Low
0xA00000-0xA007FF2048RAM Device Write, Sharedpalette, palette_device, write, palette
0xB00000-0xB01FFF8192RAM, Sharedspriteram16b
Memory Area:honeydol_sound_io_map
Address RangeLengthFunctionDescription
0x0002-0x00032Device Read/Writeymsnd, ym3812_device, read, write (// not connected?)
0x00041Device Read/Writesoundlatch, generic_latch_8_device, read, write (/* goes back to the main CPU, checked during boot */)
Memory Area:honeydol_sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0xE0101Device Read/Writeoki, okim6295_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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288d-13.1CRC(ff6a57fb) (Fluke: 6C8A)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288d-14.5CRC(2178996f) (Fluke: 06A2)
0x80000-0xFFFFF524288d-15.6CRC(6629239e) (Fluke: A9D3)
0x100000-0x17FFFF524288d-18.9CRC(0210507a) (Fluke: 8131)
0x180000-0x1FFFFF524288d-19.10CRC(d27375d5) (Fluke: C3B7)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144d-11.u14CRC(f3ee4861) (Fluke: 2DFE)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768d-12.uh15CRC(386f1b63) (Fluke: 313C)
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