DECDLD usage -good enough for minimal graphics?
pkoning at equallogic.com
Mon Aug 8 16:51:06 CDT 2005
>>>>> "Julian" == Julian Wolfe <Wolfe> writes:
Julian> Hello everyone! I was just investigating the usage of DECDLD
Julian> for defining a small graphic screen on my PDP11 during a
Julian> When using a VT220 at 19200 baud, how fast can a screen be
Julian> refreshed using DECDLD graphics? I was thinking of doing a
Julian> multiplayer (4 player) game using this system.
If you plan the graphics properly, sure, no problem. PLATO had
multiplayer games long ago using 1200 baud lines. That was with a
MUCH more efficient graphics encoding, though.
Did you mean VT240? Unless my brain is going, VT220 is text only.
VT240 supports REGIS, which is a simple graphics protocol (somewhat
verbose in its encoding as I recall).
Assuming that REGIS doesn't lose more than a factor of 16 in coding
efficiency vs. PLATO -- which should be true -- you should be able to
get a couple of refreshes per second. There are plenty of interactive
games that can live with that.
More information about the cctalk