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Monster 6502 June 30, 2016

Posted by stuffilikenet in Awesome, Geek Stuff, Mutants, Toys.
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MOnSter 6502 (prototype PCB)

Monster 6502 is a circuit-board replica of the classic (in that it appeared an Apple II) MOS 6502 microprocessor. It is the project of a couple of very serious nerds who will be running BASIC programs on it at the local reverse-engineering meetup next Wednesday.  I can’t wait to meet the guys who wrote the following snippets in the FAQ for this project:

How many components are there on the board?

In total, there are 4304 components on the board. There are 3218 transistors and 1019 resistors that comprise the “functional” part of the 6502. In addition to these, there are also LEDs sprinkled throughout that indicate the values of various control lines, registers, and status bits, as well as additional transistors and resistors (not counted in those “functional” totals) that are necessary to drive those LEDs.

As of the current design, the statistics are as follows:

  • Components that correspond 1:1 with transistors in the original 6502:
    • Total active transistors: 4237
      • 3218 enhancement mode n-channel MOSFETs
        • 2599 discrete
        • 619 located on 161 quad transistor array chips (25 of these 644 transistors were not used)
      • 1019 depletion mode MOSFETs (the MOnSter 6502 uses resistors in place of these MOSFETs)
  • 525 Additional parts present only in the MOnSter 6502:
    • 167 LEDs
    • 123 extra MOSFETs for driving the LEDs
    • 20 filter capacitors
    • 2 zero-ohm jumpers for net tie reasons
    • 8 current limit resistors
    • 167 resistors for the LEDs
    • 36 diodes (for ESD protection)
    • 2 connectors (5 V power, 40-pin “ICR” ribbon cable)
  • Total parts: 4304
Are you nuts?

Probably.

Are you going to make one out of vacuum tubes next?

No.

Is there going to be a soldering kit version of this?

No. (But on the other hand, “Anything is a soldering kit if you’re brave enough!”)

Exciting update: yeah, it was just great. Never before in the history of the world has anything so pointless been done so very well, with thorough design, component selection and pre-assembly testing carefully prepared against the day that an obsolete processor’s ghost could be made to rattle the chains of Integer BASIC. Woz would be so proud.  I have some Blurricam™ footage:

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