video

[Lonnie.Reed@xxxxxxxxxxx (Lonnie Reed)]

Hi mISC,

I was thinking, but don't know if it is possible/feasible.

What if you had a system of F21's say 3 or 4, in a system. You could
 have one running the network, another running something like USB or 
firewire (for peripherals) and the i/o daemons and drivers. then the 
other cpu(s) would be the main processor that ran the apps/OS. Spare cpu
bandwidth on the "i/o dedicated processors" could be used by applications
and/or the system. Now I'll get to my question.
Since f21 only puts out 16 colors right now, and since you have multiple
f21's could you have one say "dedicated" to blue, anther to red and
a third to green. Then could you mix the video output to produce mixed
colors? Then it would seem you could produce many more colors. Would the
F21's have to be syncronized (maybe run off the same video clock)? Can
you just mix video at all? If this is possible, it seems you could have
different cpu's creating "video overlays" that could combine and be displayed
Perhaps one could display windows for a GUI, and another could diplay images
or text, etc. maybe use the anolog output line with an amp that will modulate
the intensity of the video signal from the particular f21. I might be getting
the mixed up with the mup21 has one ntsc video output line, where i think the 
f21 has R,G,B and intensity output lines.

Basically is it nontrivial (doesn't take a lot of additional cktry) to 
mix video signals? And is RBG easier to do this with than NTSC?

Another option, maybe would be to somehow gate the signal, and each F21
"owned" a part of the dispaly and only write its own portion.

Or just use the DAC for video, if that can be done.

Lonnie

Sorry the above is rough, but I'm typing in a hurry.