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Thread: Upgrading Olivetti P100-s m4

  1. #1

    Default Upgrading Olivetti P100-s m4

    i want to upgrade, if possible, the cpu of this olivetti. just upgraded ram from 16mb to 64mb. it mounts, i thinkfrom a sticker on it, a BA2270 (PCS5130?) motherboard, but i can't find any information about cpu support. if it can help, on the board are also presenti these chipsets:

    INTEL PCISET SB82371FB
    INTEL PCISET SB82437FX66
    TRIDENT TGUI9680-1
    SMC FDC37C932

    i've found some information about jumpers settings:

    J26 on 2-3 and J27 on 2-3 = clock 50Mhz
    J26 on 2-3 and J27 on 1-2 = clock 60Mhz
    J26 on 1-2 and J27 on 2-3 = clock 66Mhz

    J38 ON and J37 ON = clock x 2,5
    J38 OFF and J37 ON = clock x 3
    J38 ON and J37 OFF = clock x 2
    J38 OFF and J37 OFF = clock x 1,5


    now there is a pentium 100mhz on. can i upgrade to 200mhz? do you have any information about this motherboard?

  2. #2

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    upgraded to a P133 with jumper settings, everything is ok. so i think i can upgrade to 200max. is possible to overclock this kind of cpu?

  3. #3

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    You've got the 430FX Triton I chip set. 133MHz is typically the max. Sometimes there are jumper setting for up to 166MHz. I don't recall of any that will do 200MHz, though it is possible in theory. You can't run MMX CPUs without a voltage converter IIRC. You might get 150MHz out of the 133MHz.

    There were overdrive CPU's where you set the board for 133MHz and the CPU operates at a higher frequency regardless. That's probably your best bet.

    Edit: Just re read your first post, 66MHz x 3.0 is indeed 200MHz, so 200MHz non-MMX. Sorry for any confusion.
    Last edited by mR_Slug; April 12th, 2018 at 06:39 PM.
    Looking for: OMTI SMS Scientific Micro Systems 8610 or 8627 ESDI ISA drive controller, May also be branded Core HC, Please PM me if you want to part with one.

  4. #4

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    thanks! so i can run 200mhz pentium non-mx, socket 5... does it exist?

  5. #5

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    Here is a list of CPUs:
    https://en.wikipedia.org/wiki/List_o....35_%C2%B5m%29

    The P54CS 200MHz for the socket 7 will likely work. I can't guarantee it will work though. I have a socket 5 system that has a 166MHz CPU in it. Another identical system that will only go to 133MHz, perhaps it's a BIOS revision issue. These systems however use the older NX chipset. I'd certainly give it a go.
    Looking for: OMTI SMS Scientific Micro Systems 8610 or 8627 ESDI ISA drive controller, May also be branded Core HC, Please PM me if you want to part with one.

  6. #6

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    the socket is 5 not 7...

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    Thomas Byers (DRI)- "You'll have a million people using the A> [MS-DOS prompt] forever. You'll have five million using [nongraphic] menu systems such as Topview, Concurrent PC-DOS, Desq, and those types. But there'll be 50 to 100 million using the iconic-based interfaces."

  8. #8

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    Socket 5 and socket 7 are pin compatible, but socket 7 has an additional pin.

    this Intel page in the wikipedia article Caluser2000 linked to explains the differences.

    Socket 7 is a 321-pin ZIF (Zero Insertion Force) processor socket and is a superset of the previous 320-pin Socket 5. Socket 7 provides the option and capability to support both unified-plane processors and split-plane, dual voltage processors. Socket 7 requires that the CLK and PICCLK signals be driven at 3.3 volts.

    All Intel® Pentium® processors that are compatible with Socket 5 are compatible with Socket 7, but Intel Pentium Processors with MMX™ technology are designed for Socket 7 and are not compatible with Socket 5.

    The presence of a particular socket on a motherboard does not necessarily indicate that motherboard will support all speeds of a particular processor. Contact the system or motherboard manufacturer for information on which processor speeds are supported.
    The wikipedia article is a bit misleading, here is some info from Intel. The SL24R 166 MHz part is listed as socket 5/7. The 200MHz came out later than the 166MHz. I've never seen a 200MHz on a socket 5, but the multiplier ratio should allow for it.

    In my experience the 166MHz (non-MMX) is much more common than the 200MHz (non-MMX).

    I just found a 430FX motherboard and it booted a 166 Pentium, unfortunately it was stuck at 133 because that board only supports the 2.0 multiplier. Hope this helps.
    Looking for: OMTI SMS Scientific Micro Systems 8610 or 8627 ESDI ISA drive controller, May also be branded Core HC, Please PM me if you want to part with one.

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