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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.
Merlins Money Maze (Zilec-Zenitone, 1986)
Memory Area:merlinmm_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x5000-0x53FF1024RAM, Sharednvram
0x5400-0x57FF1024RAM
0x6000-0x60078Write NOP(/* solenoid writes */)
0x70001Read PortIN4
0x0001LowActive High
0x0000HighActive High
0x0002LowActive High
0x0000HighActive High
0x0004LowActive High
0x0000HighActive High
0x0008LowActive High
0x0000HighActive High
0x001010PActive Low
0x002020PActive Low
0x004050PActive Low
0x0080100PActive Low
0x8000-0x83FF1024RAM Write, Sharedpingpong_colorram_w, colorram
0x8400-0x87FF1024RAM Write, Sharedpingpong_videoram_w, videoram
0x9000-0x90023RAM
0x9003-0x905280RAM, Sharedspriteram
0x9053-0x97FF1965RAM
0xA0001Writecoin_w (/* irq enables */)
0xA0001Read PortIN0
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xA0801Read PortIN1
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008Joystick DownActive Low
0x0010Start 1Active Low
0x0020Joystick UpActive Low
0x0040Joystick RightActive Low
0x0080Joystick LeftActive Low
0xA1001Read PortIN2
0x000210pActive High
0x000020pActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010NoActive High
0x0000YesActive High
0x0020NoActive High
0x0000YesActive High
0x0040NoActive High
0x0000YesActive High
0x0080NoActive High
0x0000YesActive High
0xA1801Read PortIN3
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xA2001Write NOP(/* SN76496 data latch */)
0xA4001Device Writesnsnd, sn76496_device, write (/* trigger read */)
0xA6001Device Writewatchdog, watchdog_timer_device, reset_w
Memory Area:pingpong_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x83FF1024RAM Write, Sharedpingpong_colorram_w, colorram
0x8400-0x87FF1024RAM Write, Sharedpingpong_videoram_w, videoram
0x9000-0x90023RAM
0x9003-0x905280RAM, Sharedspriteram
0x9053-0x97FF1965RAM
0xA0001Writecoin_w (/* coin counters + irq enables */)
0xA2001Write NOP(/* SN76496 data latch */)
0xA4001Device Writesnsnd, sn76496_device, write (/* trigger read */)
0xA6001Device Writewatchdog, watchdog_timer_device, reset_w
0xA8001Read PortSYSTEM
0xA8801Read PortINPUTS
0xA9001Read PortDSW1
0xA9801Read PortDSW2
 

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
0x0000-0x1FFF8192merlinmm.7hCRC(f7d535aa) (Fluke: 9E9A)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192merl_sp.12cCRC(517ecd57) (Fluke: 7D57)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384merlinmm.ic2CRC(ea5b6590) (Fluke: 8A8A)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32merlinmm.3jCRC(d56e91f4),palette (Fluke: 5B91)
0x0020-0x011F256pingpong.5hCRC(8456046a),characters (Fluke: 94E1)
0x0120-0x021F256pingpong.11jCRC(09d96b08),sprites (Fluke: E3B0)
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