Werner Is all your code in C, or did you use some assembly language? Or maybe this is all assembler?
Any hope of recovering the missing pixels on the edges? --- Ron K. Jeffries On Sun, Apr 24, 2011 at 20:19, Werner Almesberger <[email protected]>wrote: > I wrote: > > Yeah, I wonder how much we can strecth those timings. At least in > > theory, a digital display doesn't really need a lower bound for > > pixel frequency and such. So maybe even a better approximation of > > full QVGA resolution is possible. > > ubb-vga now has a "double" mode in which it uses a set/clear pair > for each pixel instead of alternating set and clear. This improves > the resolution but makes the timing quite VGA-unlike. > > Single: > > http://downloads.qi-hardware.com/people/werner/ubb/vga/ubb-vga-screenshot.jpg > > Double: > http://downloads.qi-hardware.com/people/werner/ubb/vga/ubb-vga-double.jpg > > For reference, the original screen content is here: > > http://downloads.qi-hardware.com/people/werner/ubb/vga/jlime-desktop-original.png > > One can see that about five pixels get chopped off the left and > about 25 pixels off the right. I've tried this only with one > monitor so far and don't know yet how palatable others will find > this signal. > > For those interested in how the mappings work, here's a diagram: > http://downloads.qi-hardware.com/people/werner/ubb/vga/mapping.pdf > > And here's the description (section "Single/double mode"): > > http://projects.qi-hardware.com/index.php/p/ben-blinkenlights/source/tree/master/ubb-vga/README > > Last but not least, Wolfgang has made a better conversion of my > ubb-vga video (uncut): > > http://en.qi-hardware.com/w/images/7/76/Ben_UBB_VGA.ogv > > Thanks ! > > - Werner > >
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