mjt@super.ORG (Michael J. Tighe) (12/23/88)
In article <2523@ficc.uu.net> karl@ficc.uu.net (karl lehenbauer #) writes: >The Cray line has error correction/double error detection, an innovation >(not pioneered by them) that buys a good deal more than parity detection >alone, hence it's in there. This is not a flame, but the original Cray 1 (Serial Number 1), did not have SECDED. It did have parity checking. If you pay close attention to the line of machines he designed, (and the features they have and don't have) you can learn a lot about what he thought would speed up or slow down his machines. -- ------------- Michael Tighe internet: mjt@super.org uunet: ...!uunet!super!mjt
seanf@sco.COM (Sean Fagan) (01/01/89)
In article <2523@ficc.uu.net> karl@ficc.uu.net (karl lehenbauer #) writes: >The Cray line has error correction/double error detection, an innovation >(not pioneered by them) that buys a good deal more than parity detection >alone, hence it's in there. I'm fairly certain that the Cyber 170/760 that I worked on (designed by Seymour himself) had SECDED. Seymour may have done the "innovation," but not Cray Research Inc. -- Sean Eric Fagan | "Merry Christmas, drive carefully and have some great sex." seanf@sco.UUCP | -- Art Hoppe (408) 458-1422 | Any opinions expressed are my own, not my employers'.
fisher@Alliant.COM (Larry Fisher) (01/03/89)
In article <1992@scolex> seanf@sco.COM (Sean Fagan) writes: >I'm fairly certain that the Cyber 170/760 that I worked on (designed by >Seymour himself) had SECDED. Seymour may have done the "innovation," but >not Cray Research Inc. Seymour's involvement with the the design of the 170/760 did *NOT* include the central memory. The CPU of the 760 was lifted from the 7600: the modules are *identical*. The memory system of the 170/760 was designed after Seymour left CDC. BTW, the later CYBER 180/865, announced in 1982, was an "improved" 170/760 in that it permitted 1M words of memory. None of the modifications to the the 7600-type CPU in the 180/865 were done by Seymour. "Just an old bit of CYBER DATA to chew on..." -- Larry Fisher Domain: fisher@alliant.com Alliant Computer Systems UUCP: {linus}!alliant!fisher Littleton, MA 01460 Phone: (617) 486-1449