Re: HP 82163 video interface Message #2 Posted by Eric Smith on 22 Feb 2006, 6:53 p.m., in response to message #1 by Bill Lafferty
The 82163A produces NTSC-rate video (or maybe PAL-rate, if there was a PAL version). This means that it has about 15.75 KHz horizontal sync, while most VGA monitors can't sync to less than about 31 KHz. Some VGA monitors can be damaged by out-of-spec signals; others simply won't work properly.
If you're sure your VGA monitor can handle signals that slow, you may be able to wire an adapter. If the monitor can handle sync-on-green, you can just wire the composite output to the green input of the monitor, and you'll get green text. But if it doesn't do sync on green, then you'll need a sync separator circuit (e.g. LM1881 and a few passives, and a power supply).
Are you sure you can't just find an old video monitor (non-VGA)?
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