On 4/1/22 10:27, Paul Koning wrote: > > >> On Apr 1, 2022, at 1:25 PM, Chuck Guzis via cctalk <cctalk@classiccmp.org> >> wrote: >> >> Wasn't some of this glass delay line memory used in early raster-scanned >> computer video displays? > > I don't know about that one, but a delay line is a key component of a PAL > (European) system color TV receiver.
I know that the CRT display controller on the CDC 200 series terminal (INTERCOM, Export/Import 200 software) used a 10 msec magnetostrictive delay line.for image storage. Glass would seem to be a more mechanically robust storage medium. See:page 1-5 http://bitsavers.org/pdf/cdc/terminal/82128000_200_User_Terminal_Hardware_Reference_Jul68.pdf Later raster terminals used MOS shift register memory. The STAR-100 stations used a track on the station microdrum for video refresh. --Chuck