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Thread: Commodore 64 Help

  1. #1

    Default Commodore 64 Help

    Hello, i recently purchased a Commodore 64 off of Craigslist.com. The unit appeared to be in good shape and had all the parts but the seller never mentioned if it worked or not. The unit powers on and has (what i believe is a video RCA connection?) but i cannot display video. The only thing the unit is missing is a manual so perhaps i am doing something wrong. Any help would be greatly appreciated, i'd hate to find out that i dropped 30 bucks on a dud

  2. #2

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    The video isn't RCA, unfortunately. You need to buy a video cable to plug into the 8-pin DIN port on the back of the machine to provide you with a video signal, or find an RCA-to-coax cable to hook up the RCA jack output to a TV input jack.
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  3. #3

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    where would i go about finding these, you think radio shack would have them?

  4. #4

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    by RCA-to-coax do you mean an RF modulator? if so i could get one of those anywhere.

  5. #5

    Default

    No, you don't need an RF modulator.
    The signal at the RCA jack of the C64 is already RF modulated.
    If you run a cable from it to your TV's antenna jack and tune the TV to channel 3 or 4, you should get a picture.
    (I use a cable with RCA male on both ends, and an adapter: "F" male to RCA female)

    One of the other jacks is for monitor video, but that's the one that needs a special cable.
    Maybe this will help:
    http://www.zimmers.net/anonftp/pub/c...4-r1.chips.gif

    Andy
    "It's a me-too, 8-bit machine with good graphics and a disk system nobody will support."
    -- Bill Gates, about the Sony SMC-70 and it's new 3.5" floppy drives (InfoWorld; June 7, 1982)

  6. #6

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    ok so i went to radio shack and bought the RCA-to-Coax. It works, is there suppost to be sound, or how can i test it. i dont have any cart's or any thing so is there anything on the c64 stock to be able to mess around with?

  7. #7

    Default

    http://www.lemon64.com/manual/
    There's a sample sound program in Chapter 8.
    "It's a me-too, 8-bit machine with good graphics and a disk system nobody will support."
    -- Bill Gates, about the Sony SMC-70 and it's new 3.5" floppy drives (InfoWorld; June 7, 1982)

  8. #8
    Join Date
    Jul 2003
    Location
    Västerås, Sweden
    Posts
    5,025

    Default

    Quickest way to test for sound:

    POKE 54296,15:POKE 54278,240:POKE 54273,100:POKE 54276,33
    (max volume, full sustain ADSR, medium pitched note, sawtooth waveform)

    Turn it off with POKE 54296,0 or hit RUN/STOP + RESTORE.

    The manual example is good too, but a bit long to type in just to test if the sound chip is OK or not.
    Anders Carlsson
    Retrogathering 2010 (Stockholm, October 2-3)

  9. #9
    Join Date
    Jul 2005
    Location
    United States
    Posts
    2,236

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    Moved to Commodore....

    -VK
    Life is composed of different inventions
    -Mikhail Kalashnikov

  10. #10

    Default

    ok so i tested these things but they didnt work, i dunno if that means its faulty or if im not using the proper connection, if i have the rca-to-coax should that be producing noise or do i have to use another cable separately?

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