I've actually put a LOT of thought into this. 

It turns out that there are several different USB-> VGA converters
available on the market. The problem is most of them are designed to
work with Windows. The manufacturer of one of the chipsets has released
a Linux driver which with a lot of effort could be compiled for a Touch.
That gives you a second frame buffer. But you still have to write pixels
to it. At this point you have two ways, rewrite the low level graphics
routines to write to both frame buffers, or modify the existing
framebuffer so it goes ahead and copies whatever is written to itself
and to the new framebuffer. 

Of course this will be an exact duplicate, pixel for pixel of the
Touch's screen. There is a problem, almost nothing else has the same
pixel dimensions so it will be interesting to see if anything would
display it or not. Even if it does you will have a very pixilated
display, there will be no "smoothing" going on. 

Another option is to set the USB frame buffer up to a much larger pixel
size and write a new skin for that so fonts look good etc. That would be
WAY more work but could theoretically be done. Since there are a lot
more pixels being displayed it might slow things down. 

So theoretically it could be done, but it might take a lot of work
which probably means it won't happen any time soon.

John S.


-- 
JohnSwenson
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