20 Jul
2016
20 Jul
'16
2:19 p.m.
On Jul 20, 2016, at 9:12 AM, Mouse <mouse at
Rodents-Montreal.ORG> wrote:
Given modern processor speeds, an obvious answer is to do it the same way the CDC
mainframes drive the console: a program loop feeding coordinates to the interface. You
just need a loop that takes less than the acceptable refresh interval (30-50 ms or so)
which isn't hard to do. Especially since the deflection performance is likely to be
the limiting factor.
paul
As far as sending video from a computer frame
buffer, I think it
might be way too fast.
I wouldn't be doing that. I cited the cg6 by way of contrast. How the
points get into the display hardware is still open, but a framebuffer
seems unlikely to be involved. (I suppose a framebuffer with something
like DVI-D could be used as a way to continuously replay sequences very
fast, but it has its limitations. I'd rather build a hardware ring
buffer, but I tend towards hardware hackery.)