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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.
Blockade (Gremlin, 1976)
Memory Area:main_io_map
Address RangeLengthFunctionDescription
0x00011Read/Writeblockade_input_port_0_r, blockade_coin_latch_w
0x00021Writeblockade_sound_freq_w
0x00021Read PortIN1
0x0001Joystick UpActive Low
0x0002Joystick RightActive Low
0x0004Joystick DownActive Low
0x0008Joystick LeftActive Low
0x0010Joystick UpActive Low
0x0020Joystick RightActive Low
0x0040Joystick DownActive Low
0x0080Joystick LeftActive Low
0x00041Read PortIN2
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x00041Writeblockade_env_on_w
0x00081Writeblockade_env_off_w
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x07FF2048ROM, Mirror0x6000
0x8000-0x83FF1024RAM Write, Shared, Mirrorblockade_videoram_w, videoram, 0x6c00
0x9000-0x90FF256RAM, Mirror0x6f00
 

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.   
Sorry, We do not have ROM Memory Map information for this game.
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