OT: need to drive a vector CRT...

From: Gene Buckle <geneb_at_deltasoft.com>
Date: Mon Sep 15 15:29:00 2003

> there is a arcade game emulator called "mame" that has emulation of
> vector graphic but uses ordinary raster scanned (runs on normal vga).
> You'd have a lot better maintainability and quality if you took a regular
> vga monitor and wrote code to take in your vector plot data and made
> a custom driver for a "game" that mame could run which would paint
> your vector stuff on the screen.
> You would use a 5": vga color painting green lines, and would restrict
> the thing with a mask in the software to keep it in the confines of the
> console punchout's geometry. I would think that even the air force
> might options such a product to replace their units...

Jim, the vector requirement is one of hardware, not software. Trust me,
if I could buy a 4" round raster CRT, I'd jump on it. The whole problem
is due to the size constraints. that I'm faced with. A 5" CRT is actually
too large to be properly fit within the confines of the original
enclosure. I therefore have to use a 4" tube from an oscilloscope as a
replacement. To my (limited!) knowledge, no one makes such a thing in a
raster drive configuration.

If you look at http://www.f15sim.com/images/tews_teardown_sm.jpg (view
tews_teardown.jpg for a much larger image) you'll see what I have to work
with. Due to screen burn on the CRT, I've discovered that there are
quadrant marks that are painted along the edge of the CRT circumference,
much like a clock. This means that for my simulation to be correct, the
replacement must be round. A square tube or LCD would give far too small
an image. I'm going to write the driver software myself, but I have to be
able to drive the screen first. :) If I could find a ready-made NTSC or
VGA to vector converter, I'd be set.


Received on Mon Sep 15 2003 - 15:29:00 BST

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