Ha... max users=6 :) Sounds a bit like my first computer-related job.
Around 1979 I asked to be moved across the hall from the manual map
drafting department (ink on silk) to the new graphic computers. We had
10 stations running sold by this company:
https://en.wikipedia.org/wiki/Computervision
The displays were storage scopes, and you could see the computer draw a
very bright temporary line on the green phosphor which then "stuck" as a
charged image, but not nearly as bright as the original flash. Lines
(and multiple lines that approximated arcs) accumulated on the screen
until the drawing was complete. To erase something, the computer would
flash a high voltage to the screen that erased everything, and then it
repainted the entire image all over again (minus what was erased). You
had to have the patience of a saint.
Edward Finnell wrote:
Back in the sixties when Federal Systems was big, I seem to remember graphics on TI/HP terminals with oscilloscopes as screen via acoustic couplers no less. Later there were graphic accelerators that went thru the 5088. Haven't looked in a while but there was an option in PARMLIB for graphics support.
Back when Bill Butterfield/GMR was head of SHARE one of his merry men gave a talk on their environment. It was a big 600j with a good bit of graphics. Don't remember the specifics but maxusers on TSO was 6.
In a message dated 11/26/2017 2:43:55 PM Central Standard Time, [email protected] writes:
APA = All Points Available (or Addressable), which would allow any dot
on the screen to be set by the host. I assume that means I could send
special codes to the screen to say, draw a (real) line or arc, or maybe
just send an entire block of bits to the screen. And I think I read
this function was never available on any real IBM hardware, only on
emulators.
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