Glass memory?

[Chuck Guzis]

On 4/1/22 10:27, Paul Koning wrote:
> 
> 
>> On Apr 1, 2022, at 1:25 PM, Chuck Guzis via cctalk <cctalk at 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