15 Jul
2020
15 Jul
'20
8:41 a.m.
Thanks for the link to the Philco Read system. The manual lists interesting
details like the inductivity of the deflection coils and the respective
currents through them.
Tom Hunter
On Wed, Jul 15, 2020 at 9:24 PM Toby Thain via cctalk <cctalk at classiccmp.org>
wrote:
On 2020-07-15 9:18 a.m., Toby Thain via cctalk wrote:
>
For many years I have been trying to find one of these vector drawn CC545
>
The CC545 console achieved unusually fast deflection with an
> electromagnetically deflected CRT. I am trying to understand the tricks
> they used to get these high speeds. Part of the magic is a dual-yoke which
Philco was also involved in the design of Carnegie's "Visual Display
System Suitable for Time Shared Use", described by J. Quatse.
It also had a fast vector generator described in that book.
--Toby
> --Toby
>> using the first yoke (this is VERY fast) and then painted the character
>> using a second yoke around that base position with 0.1 microsecond per
>> stroke (this is VERY fast too). The two yokes work in an additive
manner.
>> ...
>> Tom Hunter
>>
On 2020-07-15 1:51 a.m., Tom Hunter via cctalk
wrote:
> I have been working on CDC CYBER 170 mainframes between 1977 and 1988.
...
> consoles to use with my emulator but I
haven't been able to find one.
> Recently I decided to build a clone of it myself. Bitsavers has a
hardware
> manual with schematics:
>
>
>
http://www.bitsavers.org/pdf/cdc/cyber/cyber_170/62952600L_CYBER_170_Displa…
> provided gross positioning within 2
microseconds to anywhere on the
screen
Philco READ system (and probably others) did this as well.
http://www.bitsavers.org/pdf/philco/displays/READ_Theory_And_Operation_Feb6…