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Thread: How to connect a cassette recorder to an IBM 5150?

  1. #1

    Default How to connect a cassette recorder to an IBM 5150?

    Hallo allemaal,

    At the moment I'm trying to repair a 5150 motherboard and noticed the relay. So far I didn't pay any attention to the cassette interface but having a meeting of collectors soon I decided to have a look at it and to see if it is possible to show it at the meeting. So I googled and the best info I could find was on Wikipedia. It should be enough to create a cable but I would prefer some more "for dummies" like information, just to be sure.

    Many thanks for any help!
    With kind regards / met vriendelijke groet, Ruud Baltissen

    www.baltissen.org

  2. #2

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    The IBM PC's cassette port uses the same pinout as Radio Shack TRS-80 computers.

    http://gtp-tech.com/ebay/ccr81-cable.htm


  3. #3
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    Except that the TRS connectors are 3/32" and ⅛" like on old cassette recorders.

  4. #4

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    Quote Originally Posted by KC9UDX View Post
    Except that the TRS connectors are 3/32" and ⅛" like on old cassette recorders.
    When it comes to audio jack/plug sizes, 3/32" and 1/8" are used interchangeably with 2.5 and 3.5 mm, respectively. (The 3.2 mm on the diagram above is a typo.)

  5. #5
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    Was there any IBM PC software released on cassette, or is/was it only ever used to store user BASIC programs?

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    I know that the original IBM diagnostics program was available on cassette. I often wonder what else by IBM or aftermarket was available.

  7. #7
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    Only one published program is known for sure to exist. The "Diagnostics for IBM Personal Computer 1.02" Cassette version is archived and out there.

    An early IBM product list lists a cassette version of Microsoft Typing Tutor, but no surviving copies have turned up.

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    The disk version of Avalon Hill's Galaxy could save game information to cassette making it the only program to do that. Of course, AH's early games were all BASIC so one of them might be runnable with Cassette BASIC.

    I seem to remember that someone recently converted a self booting game to load off cassette which would be more interesting than Diagnostics but I can't remember the link.

  9. #9

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    Quote Originally Posted by vwestlife View Post
    The IBM PC's cassette port uses the same pinout as Radio Shack TRS-80 computers. ....
    Thank you very much!
    With kind regards / met vriendelijke groet, Ruud Baltissen

    www.baltissen.org

  10. #10

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    For most people, the only use the cassette port ever got was using the motor relay to generate a clicking sound:


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