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. ... > > For many years I have been trying to find one of these vector drawn CC545 > 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_Display_Station_CC545-CDEF_Hardware_Reference_26Mar1979.pdf > > 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 > 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_Feb65.pdf --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 >
