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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.
Invader's Revenge (Zenitone-Microsec Ltd., 0)
Memory Area:invrvnge_io_map
Address RangeLengthFunctionDescription
0x00001Read PortIN0
0x0001UnusedActive High
0x0006DifficultyActive High
0x0000EasyActive High
0x0002HardActive High
0x0004HarderActive High
0x0006HardestActive High
0x0008UnknownActive High
0x0010UnusedActive High
0x0020UnusedActive High
0x0040UnusedActive High
0x00003Active High
0x00806Active High
0x00011Read PortIN1
0x0001Coin 1Active Low
0x0002Start 2Active High
0x0004Start 1Active High
0x0008UnknownActive High
0x0010Button 1Active High
0x0020Joystick LeftActive High
0x0040Joystick RightActive High
0x0080UnknownActive Low
0x00021Read, Device Writeinvrvnge_02_r, mb14241, mb14241_device, shift_count_w
0x00031Device Read, Writemb14241, mb14241_device, shift_result_r, invrvnge_sh_port_1_w
0x00041Device Writemb14241, mb14241_device, shift_data_w
0x00051Writeinvrvnge_sh_port_2_w
0x00061Device Writewatchdog, watchdog_timer_device, reset_w
Memory Area:invrvnge_sound_map
Address RangeLengthFunctionDescription
0x0000-0xFFFF65536ROM(// dummy prg map, TODO: decrypt ROM)
 

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
0xF000-0xF7FF2048snd.2cCRC(135f3b16)
0xF000-0xF7FF2048snd.2cCRC(135f3b16)
0xF800-0xFFFF2048snd.1cCRC(152fc85e)
0xF800-0xFFFF2048snd.1cCRC(152fc85e)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048h.ic36CRC(0e229b9f)
0x0000-0x07FF2048h.ic36CRC(0e229b9f)
0x0800-0x0FFF2048g.ic35CRC(26b38aa4)
0x0800-0x0FFF2048g.ic35CRC(26b38aa4)
0x1000-0x17FF2048f.ic34CRC(b3b2749e)
0x1000-0x17FF2048f.ic34CRC(b3b2749e)
0x1800-0x1FFF2048e.ic33CRC(d8e75102)
0x1800-0x1FFF2048e.ic33CRC(d8e75102)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048colour.binCRC(7de74988)
0x0000-0x07FF2048colour.binCRC(7de74988)
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