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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.
King Derby (bootleg, 0)
Memory Area:master_io_map
Address RangeLengthFunctionDescription
0x00001Read/Write NOP(//interrupt ack)
Memory Area:master_map
Address RangeLengthFunctionDescription
0x0000-0x2FFF12288ROM
0x3000-0x33FF1024RAM, Mirror, Shared0xc00, share1
0x4000-0x43FF1024RAM Write, Sharedsc0_vram_w, vram
0x5000-0x53FF1024RAM Write, Sharedsc0_attr_w, attr
Memory Area:slave_io_map
Address RangeLengthFunctionDescription
0x00001Read/Write NOP(//interrupt ack)
Memory Area:slave_map
Address RangeLengthFunctionDescription
0x0000-0x2FFF12288ROM
0x3000-0x3FFF4096ROM(//sound rom, tested for the post check)
0x4000-0x43FF1024RAM, Sharednvram (//backup ram)
0x5000-0x50034Device Read/Writeppi8255_0, i8255_device, read, write (/* I/O Ports */)
0x6000-0x60034Device Read/Writeppi8255_1, i8255_device, read, write (/* I/O Ports */)
0x7000-0x73FF1024RAM, Sharedshare1
0x7400-0x74FF256RAM, Sharedspriteram
0x76001Device Writecrtc, mc6845_device, address_w
0x76011Device Read/Writecrtc, mc6845_device, register_r, register_w
0x7801-0x780F15Writeled_array_w
0x7A001RAM(//buffer for the key matrix)
0x7C001Read PortDSW
Memory Area:sound_io_map
Address RangeLengthFunctionDescription
0x00401Device Readaysnd, ay8910_device, data_r
0x0040-0x00412Device Writeaysnd, ay8910_device, data_address_w
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x2000-0x23FF1024RAM
 

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:master
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096h4CRC(20f2d999) (Fluke: 9A5A)
0x1000-0x1FFF4096h5CRC(c192cecc) (Fluke: 9CE8)
0x2000-0x2FFF4096h6CRC(257f4e0d) (Fluke: 6B9A)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512clrCRC(ffabacc9)
Memory Area:slave
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40967CRC(26974007) (Fluke: AE20)
0x0000-0x0FFF4096h14CRC(2d040e86)
0x0000-0x0FFF4096h1CRC(444aa020)
0x1000-0x1FFF4096h15CRC(eec11348)
0x1000-0x1FFF4096h2CRC(4102d356)
0x1000-0x1FFF40968CRC(bedebfa7) (Fluke: FCC9)
0x2000-0x2FFF4096h3CRC(b5a95093)
0x2000-0x2FFF40969CRC(0aa59571) (Fluke: B42B)
0x3000-0x37FF2048h16CRC(252ee644)
0x4000-0x4FFF409611CRC(32613df3) (Fluke: 4B14)
0x5000-0x5FFF409612CRC(a151c422) (Fluke: 1098)
0x6000-0x6FFF409613CRC(7cfcee55) (Fluke: 40E1)
0x7000-0x77FF2048h17CRC(dd79b1fa)
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