User talk:MarkMLl

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#    Degrees in electronics, ex-B, ex-LUT, ex-GM.
#    Not married, no children, does not live in East Sussex.
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#    See User page tab (above) for more info.
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[edit] Core on Burroughs large systems

I had a 5700 and a 6800 at one time the 5700 had actual core memory, i.e. ferrite cores, but the 6800 was semiconductor. Didn't look at your changes but those are the facts. The 5000 series generally preceeded VLSI. Lycurgus 07:17, 2 September 2007 (UTC)

[edit] XDBus

Hi, I saw your changes to Cray CS6400 etc. claiming it was derived from the Xerox Dragon. While the XDBus was, of course, derived from the Dragon's inter-processor bus, there is more to a computer architecture than the inter-processor bus. Hence, I think it is a bit of an exageration to say that the SPARCcenter 2000 was essentially the same as a Dragon (which was, after all, based on a proprietary processor architecture and not SPARC-based) and that the CS6400 was therefore primarily a derivative of the Dragon also. Letdorf 11:43, 16 July 2007 (UTC).

I have a preprint of "SPARCcenter 2000: Multiprocessing for the 90’s!" which I believe was presented at

COMPCON SPRING ’93, San Francisco, Feb. 1993. This is co-authored by teams of engineers from Xerox and

Sun, and describes the SC 2000 in detail- rather more detail, in fact, than I've found elsewhere.

I believe that the Dragon, unlike other Xerox machines, was SPARC-based- if you have authoritative

information to the contrary I'd be happy to be corrected. Furthermore I believe that a common- or at

least very similar- chipset was used for the SPARCcenter, SPARCserver, and CS6400, this was either

identical to or a close derivative of the chips designed at Xerox by Neil Gunther. --MarkMLl 13:33, 16 July 2007 (UTC)

OK, I've got confirmation that the Dragon was based on custom logic rather than SPARC and amended

the article appropriately. Obviously any more light that you can throw on this would be appreciated.

--MarkMLl 18:01, 16 July 2007 (UTC)