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Thread: Dual socket 5 with P266 Tillamook's

  1. #11
    Join Date
    Apr 2015
    Austin, Texas


    Quote Originally Posted by krebizfan View Post
    The multiple CPUs on cards was a design concept from ALR. A lot of support logic was needed and the price was very high. It did get a bit extreme; shows a design using 6 Pentium Pro chips (up from the specified maximum of 4). ALR got purchased by Gateway not long after the Pentium Pro design and moved to more affordable yet still high end server designs.
    Those 6x6 servers had very limited use cases because the FSB was so overloaded that utilizing each CPU to full potential was impossible. Doing something like number crunching was OK, but other things like moving massive amounts of data around fell flat on their face because of the 66 MHz FSB.

  2. #12
    Join Date
    May 2011
    Outer Mongolia


    Quote Originally Posted by Eudimorphodon View Post
    IBM made a hex-CPU Pentium machine called the Server 720 that had only one CPU per card.
    FWIW if you dig around enough you can determine that the multi-CPU bus arbitration system used in this machine was a technology IBM licensed from a company called Corollary named "C-Bus II"; C-Bus I was used on 486 machines but apparently there are both symmetric and asymmetric variations of the former. C-Bus is referred to (in passing) in the Intel MP specification document, and this source code for the Corollary HAL for Windows NT refers to programming APICs in what appears to be the manner described by the MP spec. What seems to be utterly impossible to find is any documentation about the actual CPU card implementation; apparently each card could have local cache, but whether it made any use of the specific dual-CPU signals brought out on the P54C CPUs to help with coherency or not, well, good luck finding a definitive answer. This well may be arcania lost to history.

    Here's a list of servers that used C-Bus II, I guess you could try tracking one of these down and replacing the CPUs with Tillamook CPUs on interposers. But, man, does that sound like a lot of work for a computer that an Abit BP6 with dual Socket 370 Celerons would run rings around.
    My Retro-computing YouTube Channel (updates... eventually?): Paleozoic PCs

  3. #13


    Nice juicy information. Thank you.

    In the year 2020, such questions mostly stem from hobby interest. It would make for a very unique collector's item to have a dual P100 upgraded to dual Tillimook, similar to how Vogons user 386_junkie has been uprading his dual 386 SystemPro systems with 486SXL2 processors, and . Seems that there was also an ALR Powerpro dual 386 EISA system as well, which had 386 and 486 CPU cards:

  4. #14


    OS/2 2.11 from '94 supports up to 16 CPUs. What systems with 16 CPUs were available in '94?

    The list of supported systems does include some Pentium systems:

    The minimum hardware configuration to run OS/2 for SMP is one of the following hardware platforms:

    Advanced Logic Research -- ProVEISA SMP (486DX2)

    AST Research -- Manhattan (486DX2, Pentium)

    Compaq -- Proliant 2000 (Pentium)

    Compaq -- Proliant 4000 (Pentium)

    Hewlett Packard -- Netserver 5/66 LM2

    Tricord Systems -- PowerFrame M30 (486DX2)

    VTech -- Platinum SMP (486DX2)

    Wyse Technology -- Series 7000i M760 (486DX2)

  5. #15
    Join Date
    May 2009
    Blog Entries


    Quote Originally Posted by mcs_5 View Post
    OS/2 2.11 from '94 supports up to 16 CPUs. What systems with 16 CPUs were available in '94?

    The list of supported systems does include some Pentium systems:
    AST claimed that the Manhattan server was capable of using 16 Pentium processors.


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