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  • AMD Am2900

    From Louis Ohland@21:1/5 to All on Sun Aug 29 14:24:57 2021
    http://bitsavers.org/components/amd/Am29000/1990_AMD_29K_Family_Data_Book.pdf

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  • From Louis Ohland@21:1/5 to Louis Ohland on Sun Aug 29 14:31:53 2021
    Dry hole

    On 8/29/2021 14:24, Louis Ohland wrote:
    http://bitsavers.org/components/amd/Am29000/1990_AMD_29K_Family_Data_Book.pdf


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  • From Louis Ohland@21:1/5 to All on Sun Aug 29 14:22:38 2021
    https://en.wikipedia.org/wiki/AMD_Am2900

    Am2965/Am2966 – Octal Dynamic Memory Driver

    Many of these chips also have 7400 series numbers such as the 74F2960 /
    Am2960.

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  • From IBMMuseum@21:1/5 to Louis Ohland on Sun Aug 29 14:56:58 2021
    On Sunday, August 29, 2021 at 1:32:26 PM UTC-6, Louis Ohland wrote:
    Dry hole

    On 8/29/2021 14:24, Louis Ohland wrote:
    http://bitsavers.org/components/amd/Am29000/1990_AMD_29K_Family_Data_Book.pdf


    There are a couple of variants for the 256Kb 30-pin SIMMs that are "reversed" from each other for the Model 30 286 style systems: The different "sugarcube" chips had a pattern I started to see, and I speculated that it could be czeched on the Model 80
    planar memory too. Sorry, that was on Facebook in response to Shane Benting - I should try to cross-post it here.

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  • From Louis Ohland@21:1/5 to IBMMuseum on Sun Aug 29 21:02:34 2021
    Evil Dave, would it be somewhat useful to delid one of the sugar cubes?
    What pattern was it?

    On 8/29/2021 16:56, IBMMuseum wrote:
    On Sunday, August 29, 2021 at 1:32:26 PM UTC-6, Louis Ohland wrote:
    Dry hole

    On 8/29/2021 14:24, Louis Ohland wrote:
    http://bitsavers.org/components/amd/Am29000/1990_AMD_29K_Family_Data_Book.pdf


    There are a couple of variants for the 256Kb 30-pin SIMMs that are "reversed" from each other for the Model 30 286 style systems: The different "sugarcube" chips had a pattern I started to see, and I speculated that it could be czeched on the Model 80
    planar memory too. Sorry, that was on Facebook in response to Shane Benting - I should try to cross-post it here.


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  • From Tomas Slavotinek@21:1/5 to Louis Ohland on Mon Aug 30 09:05:39 2021
    On 30.8.2021 4:02, Louis Ohland wrote:
    Evil Dave, would it be somewhat useful to delid one of the sugar cubes?
    What pattern was it?

    I'd say probably not in this case.

    It would be more useful to create schematics for all the modules (both "standard" SIMMs and the Model 80 memory cards). The chips are organized
    in patters for PCB layout reasons... but from that alone I can't tell
    what the actual "topology" is.

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  • From Tomas Slavotinek@21:1/5 to Tomas Slavotinek on Mon Aug 30 09:14:31 2021
    On 30.8.2021 9:05, Tomas Slavotinek wrote:
    I'd say probably not in this case.

    It would be more useful to create schematics for all the modules (both "standard" SIMMs and the Model 80 memory cards). The chips are organized
    in patters for PCB layout reasons... but from that alone I can't tell
    what the actual "topology" is.

    Or we could get these modules to Ken Shirriff. Cos then it would make
    sense to delid them... :)

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