Article 169695 of comp.os.vms:
At a recent computer/hamfest, I picked  up a 19" grayscale DEC VR260-AA
monitor really cheap.  I have an ISA Diamond Speedstar Pro that I want
to use it with.  I've built the VGA-to-RGB conversion circuit from the
Apollo FAQ (see http://cvs.anu.edu.au:80/monitorconversion/apollo.html)
and I use only the Green input. Using XFree86 under Linux, I have been
successful in  getting a reasonably stable screen, but I have the
following problems. 

1. No matter what I do, the left side of the screen wraps off the edge
of the screen (by about 55-60 pixels).  I've tried adjusting my
modelines according to the instructions in the "Hitchhiker's Guide to
XFree", but nothing seems to change the left side.  It's useable enough
for the price I paid for it (and the fact that it replaces a 12" VGA
monitor) but I'd like to get this problem fixed.

2. The very top of the screen is "wobbly" and windows put at the top
cause the screen to loose sync (so do windows that are completely
black).  If it has no video input and the contrast and brightness are
turned up until the scan lines are visible, they are at regular
intervals from the bottom to the middle.  At the top, though, they get
closer and closer together.  Is this normal?


Can anyone shed any light on what may be causing these phenomena?
Could it be my sloppily made cable? I've wondered if these indicate a
hardware problem (which could very well be case given the price I paid).
If it does indicate a hardware problem, does anyone know if the VR260-AA
has any internal controls for adjustment that I can use to fix these
problems?

Thanks,

William Safley
safley@pha.jhu.edu