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Re: Re (2): OT: SPARC 13W3 video (cable) adapters

On Thu, Jun 14, 2012 at 03:57:29PM -0700, Scrap Happy wrote:
> Hi Peter,
> On 6/3/2012 1:25 PM, wrote:
> >This cable works just as you describe on my Sparcstation 2 with
> >an old moitor.  I can report the monitor spec. if you need it.
> >I have no complaint with the price or function of the cable.
> Thanks!  I will make a note of it (busy chasing some other issues
> at the present time).
I'm a week late responding to this but be careful: they may well
not work on any given monitor.  The older Suns present a composite
sync-on-green signal as opposed to separate H/V sync on dedicated
pins as expected by PC monitors: this difference isn't something
that can be bridged by a passive cable but needs active electronics.
Some PC monitors can accept the signal as-is but it tends to be
higher-end, professionally orientated models: commodity budget
monitors generally don't.
You may need to build a sync separator to get the signals into the
correct format.  I do recall that there are at least a couple of
designs based on the LM1881 you could build yourself published
online.  A quick Google should find them easily enough - I'm not
doing so myself since I'm working on a text console at the minute.
Andrew Smallshaw

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