🚀 go-pugleaf

In article <51a44f$kvb@godzilla.zeta.org.au>,
Craig Dewick <craig@zeta.org.au> wrote:
>In <Pine.BSF.3.91.960910225527.8694A-100000@wintermute.ai.turing.com> 
  "Adam W. Dace" <thekind@wintermute.ai.turing.com> writes:
>
>>*chuckle*  Oh I wish it were that sinmple!  I've reviewed my nvram 
>>settings, ala printenv, and yes, there is an 'output-device' but all it 
>>seems to do is choose between video and serial ports.  ):
 
>>Now if there were a next_monitor and a sun_monitor 'value' for this 
>>setting I would be a most happy man.
 
>Actually, that monitor is very close to being able to work, because the
>vertical retrace frequency of standard Sun colour video signals is 66 Hz,
>which is only 2 Hz off what your monitor apparently works at. This is only
>a 3 percent difference, so you should be able to tweak the monitor to use
>66 Hz instead of 68 unless the innards are completely microprocessor
>controlled (unlikely if it's set to one frequency only).

   The vertical scan rate is only a minor problem. The hardest
thing to change on a monitor is the horizontal scan rate. This 
thread is asking about using a monitor from a Next workstation
on a Sun computer. The big question is -- what is the horizontal
scan rate for this monitor? If it is not compatable with a Sun
video display, then forget about the vertical rate.

   It is certainly possible to use monitors from different
incompatable computers if you are willing to redesign the circuits.
Perhaps changing the timing crystal on the Sun video board will do
the trick. But such substitutions are rarely easy. That is why
random workstation monitors are cheap.

-- 
   Michael Coughlin      mikc@gnu.ai.mit.edu      Cambridge, MA USA