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Magic-1 HomebrewCPU Works!

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Uploaded by on Jan 26, 2009

I videotaped my bring-up attempts for my homebuilt computer. This is the one that worked. Magic-1 is a completely home-built computer, including the CPU. It is made out of about 200 74 series TTL chips plus relatively modern SRAM, UARTs and an old 8055 programmable 8-bit I/O port. For more details see http://www.homebrewcpu.com

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Science & Technology

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Standard YouTube License

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Uploader Comments (buzbee1)

  • What frequency is your 555 timer running?

  • @tvolala1976 The 555 timer is set up as a variable speed clock, with a range of appx. 1Hz to 200Hz. During the Fibonacci run, I'd estimate it was running at about 10Hz.

  • Amazing work Bill! I assume your output is in HEX not DEC or your computer would be wrong!

  • @Minifig666 Yes - the result is in hex using some slick old HP LED displays (5082-7300 series). Each of the displays has a 4-bit latch and display logic for showing 0-9, A-F. Neat little devices. They are really hard to find, but are similar to the TIL-311, which are easier to find these days (but still expensive).

Top Comments

  • Bravo! Very impressive! I have no doubt that you have read the book The Soul of a New Machine by Tracy Kidder, which as you know, tells the story of the Herculean effort necessary to develop and successfully construct such machines. If anyone out there wants to truly understand the significance of what Buzbee1 has accomplished here, you absolutely need to read this book. Thank you for keeping this art alive.

  • Now all you need is to be transported back to 1970 and you can out compete hewlett packard and ibm.

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All Comments (53)

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  • When the 37 appeared I couldn't help but yell 'YESS!!'

  • You. Are. The. Coolest. Person. Ever. In. Computers. !.

  • Higher resolution video would have been nice.

  • Potato cam! :D

  • @MrJavaman5 Discrete transistors? It would be MUCH bigger... of course he used ICs - it is made out of ~200 74xx TTL ICs. (watch video again and read video description next time)

  • Are there any integrated circuits used, or are you just using transisters?

  • it looks like it can run gta iv

  • i've always thought i was pretty smart with computers...but i honestly didnt understand like 99% of what you just said here. all i know is that thats pretty damn smart!

  • so you plan on building a graphics unit and running some type of DOS?

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