I have seen statements that the direct Open Firmware video support in 
1.0.5 only has a single scan rate/pixel size that they support.  I 
have seen the vertical refresh rate quoted as 120 Hz and 60 Hz.

Well I hooked up one of the really old (now anyway) Apple color 
monitors which are fixed frequency 35 KHz horizontal by 66 Hz 
vertical and it works just fine with OF, NetBSD, and X.  In fact it 
looks better than the nearly-as-old Apple 19 inch because it's 
crisper and the colors are more saturated.

It makes sense that Apple would support their lowest common 
denominator scan rate in OF.  I don't have a PC monitor to try, but 
it's possible that there is something in the initialization code that 
checks for this monitor so they can do either VGA 640X480@60 or the 
Apple 640X480@66.  I can't see 120 Hz as a reasonable default and 
suspect that report was mistaken, or else my memory is.

X seems unusably unstable, at least as run from xdm in the 1.5 alpha 
snapshot.  It sure is nice being able to get rid of all the stray 
uninitialized pixels though.

Signature held pending an ISO 9000 compliant
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h.b.hotz@jpl.nasa.gov, or hbhotz@oxy.edu