Anyone familiar with these vintage touchscreens?
nw.johnson at ieee.org
Sat Oct 19 13:23:46 CDT 2019
Judging by the year, it was probably a teletext terminal. There were
various field trials of such systems around that era. We had one in
Toronto's Eaton Centre - it was based on NAPLPS, and used a PDP11/23.
There was a lot of Canadian Government money put into research to
promote he Canadian vector-based protocol, claimed to be more efficient
than the European alpha-mosaic ones. Ours ran at 1200/150(?) baud.
Research was done at a Bell Canada site on Carlingview Avenue in Ottawa
under some sort of sub-contract. They used Able DMAXes on an 11/70
which had a pot to adjust the 150 baud clock. They actually flew me up
from Toronto, with a scope, to adjust that pot, since everybody there
was hands-off this external stuff.
It may have had a future if HTTP and the internet were not just around
One of the big players in Canada was Infomart, where I installed a bunch
of kit on PDP11s, just around the corner from where I now live in Toronto.
On 19/10/2019 14:02, Jonathan Katz via cctalk wrote:
> I saw this crop up on twitter and now I’m curious. Anyone familiar with
> these? Any idea what the backend was?
Amateur Radio, the origin of the open-source concept!
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