On 2020-07-15 9:18 a.m., Toby Thain via cctalk wrote: > 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 >
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 >> >
