In <of76e979ec.2cbf127e-on49257537.00278b0f-49257537.002cf...@us.ibm.com>,
on 01/07/2009
at 05:10 PM, Timothy Sipples <[email protected]> said:
>In fairness, I don't think they (the original poster's foil) were talking
>about multiprocessing in the multitasking sense (sharing one CPU).
Nor was I.
>I think they were talking about hardware designs,
Yes, like those marketed by the companies I listed, all[1] of whom had
commercially marketed tightly coupled systems before S/360.
>And it's a little tough to pin down when SMP began, because engineers
>are going to quibble about the definition and exact characteristics that
>qualify.
I'm not aware of any definition that would exclude, e.g., Bendix G21,
Burroughs B5000, GE 625, UNIVAC 1108.
>However, some notable systems include a version of the System/360 Model
>65 (with dual processors -- I've seen this referred to as the "M65MP"),
>and this option carried into the Model 67.
The 2067 was a somewhat different and, IMHO, better SMP design, although
the CPU was almost identical.
>But for the vast majority of customers dual (or more) CPUs in a single
>machine weren't typical until System/370.
For IBM customers; I don't believe that to be true for Burroughs[2],
General Honey B.U.L.L. or UNIVAC.
[1] I'm only aware of one Bendix G21, so I'm not sure whether it
counts as commercially marketed.
[2] At least on their B5x00 and B6500/... lines
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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