Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!cs.utexas.edu!usc!apple!mips!daver!cypress!elg From: elg@cypress.UUCP ( Marketing) Newsgroups: comp.arch Subject: Re: What's wrong with CRT storage? Summary: work was done in late 70's early 80's Message-ID: <380@cypress.UUCP> Date: 4 Aug 90 20:22:34 GMT References: Reply-To: elg@cypress.UUCP (Ed Grivna - Marketing) Distribution: comp Organization: Cypress Semiconductor Corporation Lines: 15 Electron beam addressable memory has been worked on since the 50's. The Magnetic Peripherals Inc. subsidiary of Control Data Corp. (now Imprimus, a subsidiary of Segate) had a working design in the late 70's. There were multiple problems with storage tube arcing and relative density to magnetic media, but it was fast. I believe each storage tube had an addressable matrix of 1024x1024 bits. The controller supported multiple tubes. The acronym for the machine was EBAM and it used a controller I believe based on the old CDC 5600 MPP. This controller was quite fast for its day but would be replaced by a small handfull of chips today. Ed Grivna Cypress Semiconductor