> 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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