Hi Bill,
Thank you for your answer.
I don't think the problem is sync-on-green. A quick research on Google
left me with the impression that sync-on-green is more of a problem on the
monitor side. I'm pretty sure none of my monitors use it. Perhaps another
sync problem, but not s-o-g.
Indeed it has another dip switch. Besides the resolution/frequency ones,
it has a nineth switch. Above it it's marked "EDG". I'm not sure if it's a
label to that particular switch. On the other side of the adapter, on a
table that lists all the possible modes, it�s writen only "#9 reserved"
(great help!).
I just tried [EMAIL PROTECTED] both with #9 on and off. No luck.
My friend told me that the adapter used to work on an old PowerMac at
work. I'm gonna take it there on monday and test it.
----- Original Message -----
From: "Bill Judson" <[EMAIL PROTECTED]>
To: "Quadlist" <[EMAIL PROTECTED]>
Sent: Friday, May 07, 2004 6:25 PM
Subject: Re: [q] Mac VGA adapter
> > Hi,
> >
> > I recently received three 68k Macs (IIvx, Centris 650 and Quadra
> 610).
> > Unfortunatly I dont have any Mac monitor. A friend of mine got me this
> [...]
> >
> > The adapter is aparently made by Samsung. It has lots of dip switchs
> > built on it to select the resolucion (I believe I tried all the
> variations).
> > The following resolutions are avaiable:
> >
> > 640x480 @60Hz
> > 640x480 @67Hz
> > 832x634 @75Hz
> > 1024x768 @75Hz
> > 1152x870 @75Hz
> > Multisync 832 (default)
> > Multisync 1024
> > Multisync 1152
> >
> > I tried the adapter on the builtin monitor port of the three Macs.
None
> > worked. One of them has an offboard video card (Radius?), it didnt work
> > either.
> >
> > Any idea on what's happening? Is the adapter kaputt? Should I do
> > something on the Mac or on the monitor to make both work together?
> >
> > Thanks in advance,
> >
> > Humberto
>
> All of the above modes are supported by the built-in graphics card on the
> '040s, & at least 640 x 480 on the IIvx. It may be a sync-on-green
> problem, or some other problem with sync. Are there any controls on the
> adaptor for things besides resolution?
>
> In addition to resolution, my QVS adapter supports, with various
> combinations of dip switches: Composite Sync (1), Composite Sync (2) --
> whatever the difference is, Sync on Vertical, Sync on Horizontal, Separate
> Sync, & Sync-On-Green. Without the right type of sync, the various PC
> monitors that I have tried can black out, too (with only the power LED to
> show they're on), or black out, with an amber LED, or have a picture, but
> with weird rolls or patterns.
>
> Most often what works is either Composite Sync 1, Separate Sync, or
> Sync-on-green.
>
> --
> Over,
>
> Jutso
>
> http://pages.ripco.net/~jutso/
>
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