Commodore 64 Computer - C64 - SID 6581 For Sale

Commodore 64 Computer - C64 - SID 6581
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Commodore 64 Computer - C64 - SID 6581:
$159.99

Up for sale is a Commodore 64 in excellent working condition.Video port is 8 pin. All testing and repair was completed by an electronic engineer and the internal components were professionally inspected and cleaned. The case is in great cosmetic condition but as with all 35+ year old C64\'s, there will be some color degradation due to age and sun exposure. The keyboard may have minor signs of wear such as scuffs, light scratches, nicks, fading keys, color variations, etc. After repair, the Commodore was rigorously tested with the 2016 state of the art C-64 Advanced Diagnostics Cartridge from Adoreware. We are the developer ofthis diagnostics cartridge and no other hardware verifies the operation and graphics of the Commodore 64 better. Every I/O port was tested. Every key on the keyboard was tested. Our test pattern generator auto detects the VIC model and verifies accurate video alignment, color, and graphics modes. The sound test uses the detected VIC model to generate an accurate carrier frequency, then its tested with an oscilloscope. We have the abilityto test more integrated circuits inside the Commodore than any other diagnostics tool. Our CPU, RAM, PLA, ROM, and CIA test procedures are customized to test the IO port, IRQs, memory mapping, and more in ways not available with legacy diagnostics tools. The diagnostics was run for 24 hours and had no errors.

The following is a comprehensive list of the tests conducted…

  • Zero Page RAM (4164-U9,U21,U10,U22,U11,U23,U12,U24 / 41464-10,U9/U11)
  • Stack Page RAM (4164-U9,U21,U10,U22,U11,U23,U12,U24 / 41464-10,U9/U11)
  • Screen RAM (4164-U9,U21,U10,U22,U11,U23,U12,U24 / 41464-10,U9/U11)
  • System RAM (4164-U9,U21,U10,U22,U11,U23,U12,U24 / 41464-10,U9/U11)
  • Color RAM (2114-U6)
  • CPU (6510-U7)
  • VIC (6567-U19)
  • PLA (82S1-U17)
  • SID (6581-U18)
    • All three audio oscillators
    • Sawtooth, triangle, pulse, and noise waveforms
    • ADSR & volume
    • Filters
    • Ring modulators
    • Analog to digital converters (Control port paddles)
    • Random number generator
  • All three ROMs (Kernal-U4, BASIC –U3, Character-U5)
  • Both CIAs including IRQs (6526-U1,U2)
  • Bi-Lateral Switch (4066-U28)
  • Quad Multiplexer (74258-U14)
    • All 4 memory maps
    • Video banks
    • Sprite memory locations
    • Memory 1 & Timer 2
    • Cartridge Expansion Port
    • Cassette Port
    • Keyboard Port
    • Joysticks Ports (1&2)
      • All directions and fire.
      • Analog paddles (SID analog to digital converter)
    • User Port
    • Serial Port
    • 5544 TV Test Pattern
    • BALI TV Test Pattern
    • SMPTE BARS Test Pattern
    • All graphics modes (Images)
    • Several games including fast loaders
    • Commodore\'s C64 Dead Test (781220)
    • Commodors\'s C64 Diagnostics (586220)

    NOTE: Commodore 64s are 30+ years old and the cosmetic condition may bear signs of age such as some yellowing, scuffs, scratches, or other minor imperfections.Anything beyond \"minor\" imperfections will be specifically noted in the description.

    NOTE: This item will be packed in an over-sized box to ensure a damage free delivery. We have many of these in stock, however we are not able to combine shipping due to the size. Each will be shipped separately.

    NOTE: The RCA output port on the C64 is an RF modulated audio and video port intended to connect to the coax cable input of a TV where the cable normally connects.You will need a switch box inserted between the C64 and the TV to obtain video output on channel 3 or 4.

    NOTE: C64\'s don\'t work well or at all with many modern flat screen TVs. Unless you are connecting to a Commodore monitor or tube style TV, you may need an additional video cable and a compatible TV/monitor.

    NOTE: Please verify your power supply is producing the correct voltages before connecting it to the unit.

    NOTE: The monitor and power supply are not included are were only used to demonstrate the functionally of the unit.

    For those of you who have done business with us before, you can expect the same low price, great condition items, andhonesty. Those who have not done business with us,please take time to read our response and buy with confidence. Many of our items are received in BETTER condition than described. Don\'t take our word for it, read our response and see what our customers say!

    FAST Shipping\\SAFE Arrival\\GREAT Price\\GOOD Folks w\\ EXCELLENT Business Ethics!!

    Items came packed very well. No problems. Just as described. Multiple sales.

    SUPER FAST SHIPPING AND AS ALWAYS A GREAT PRODUCT. THANK YOU VERY MUCH.

    Many times repeat customer, excellent item, packaging, & quick shipping, thanks

    Excellent transaction. Well packed, accurate description. Quickly shipped.

    Beautifully restored product, fast shipping, great to work with you! A++

    Good deal, easy transaction, shocked at how fast it arrived, happy as a clam!!

    5 Stars*Best Unimat deal around*I highly recommend this seller+++++++++++++++A

    Great like new item, better than described, very satisfied. Thanks

    Perfect condition, superb shipping arrangements, couldn\'t be happier!!

    Great tool -better than described - fast shipping - thank you very much.

    Fast delivery,honest seller,all items as advertised,great prices.I am happy .


    We have a NO QUESTIONS ASKED return policy. If you\'re not satisfied with your purchase for ANY reason, just request a return and we will issue a refund. Buyer is responsible for return shipping cost unless the item is not as described or is damaged in shipping, at which time we will provide a return shipping label.

    Buy with confidencefrom a seller with 12 years experience and 100% response!


    Buy Now

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