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Monitor hookup

Discussion in 'General Electronics' started by Ted, Jan 19, 2004.

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  1. Ted

    Ted Guest

    I have a computer built in Italy that has, what I believe to be, CGA
    outputs. I would like to pin these outputs to a VGA monitor. Can
    someone steer me to a previous discussion or web page, or reply with
    the pinouts.

    Existing computer output signals:
    (DB9 connector)
    pin 1 Analog red 1Vpp w/ 75 ohm load
    pin 2 Analog gn 1Vpp w/ 75 ohm load
    pin 3 Analog blue 1Vpp w/ 75 ohm load
    pin 4 15KHz neg horiz sync TTL w 220 ohm in series
    pin 5 50 Hz neg vert sync TTL w 220 ohm in series
    pin 7 and 8 ground

  2. Your VGA monitor will never be able to handle the format of the CGA
    characteristics. You will need a CGA monitor. It has to do with the
    scan rates, and specifications of the video signals being fed out.

    Jerry Greenberg
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