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VIDEO: Minecraft CPU Has Memory, Performs Division

Over on the Minecraft forums, user "Salaja" spent the last month creating a virtual redstone CPU within the popular block-building game Minecraft. According to Salaja, the virtual machine (within a virtual machine) can actually hold up to 16 lines of code in its memory, execute said code, and then print out the result in hexadecimal onto 7 segment displays.

"This CPU was made with extensive use of INVedit, MCedit and peaceful difficulty, and wouldn't have been possible without them," he said, adding that anyone can use his designs as long as (1) he receives some credit, and (2) they're used for non-commercial purposes. "What I want to avoid is people claiming that they made this CPU, when they really didn't."

Other than the video seen below, Salaja offers other videos to demonstrate his Minecraft brilliance including "Random Number Generator," "Add and Subtract," and "Division."

"I only had a basic understanding of logic gates, flipflops, and adders before starting this project," he said when asked how he figured out how to build the working CPU. "I built it step by step, adding whatever I thought it need. I didn't follow any existing CPU architecture, so it is possible that mine is completely unique."

Salaja started by deciding on sizes for instruction (16-bit) and ALU (8-bit). He then built a giant block of memory and a way to write values for each one-- this can be done by numerous levers or a counter that selects which line you're writing to. Next he built a bus along the outputs of the memory flip flops, and added another counter to select only one instruction to be sent onto the bus at any one time.

"The counter activates a heap on AND gates on only one of the memory slots, meaning all the other slots are having their output blocked from getting onto the bus," he said, adding that builders should keep going "until it does stuff."

  • plznote
    But can it play Crysis?
  • bugo30
    it is possible that mine is completely unique

    I see what you did there
  • 11796pcs
    Thank you for making me feel really stupid!
  • FloKid
    The question is: CAN... you dig it? ha got ya.
  • -Fran-
    Virtual machine inside a Virtual machine is a little "fat" as a description IMO.

    Anyway, one hell of a job, rofl.

  • Darkerson
    Someone did something like this in Dwarf Fortress a while back, although I dont remember if it was as complex as this or not.. Pretty damn neat none the less!
  • warmon6
    Now i wounder when hell go in the cpu business and compete with intel, amd, and arm. :lol: (im joking)

    Although nice work!
  • pc within a pc, computation.
  • warmon6
    omg! 0.0..... look at this video just to see how large this thing really is!
  • yo we heard you like pcs so we put a pc within your pc so you can compute while you spend way too much time on minecraft..