• Scotty! We need LESS power NOW! [20MHz 8570-Axx?]

    From Louis Ohland@21:1/5 to All on Sun Apr 23 07:16:36 2023
    https://www.ardent-tool.com/8570/Planar_T3-4.html

    In an odd shift, maybe the 8570-Axx can be throttled down to a 20.0000
    MHz osc on the 386 Power Platform, giving us a system somewhat
    comparable to the Model 90 T0.

    Ramming the caffeine throttle through the stops to full war power...

    8590-T0 supports DBA-ESDI.
    8570-Axx supports DBA-ESDI.

    8590-T0 has a 386DX-20 w/64KB of screaming L2 cache..
    8570-Axx has a 386DX-25 w/64KB of screaming L2 cache..

    8590-T0 supports 4x 2MB 85nS FPM.
    8570-Axx supports 4x 2MB 80nS FPM.

    Snippet from T0 complex BIOS

    https://www.ardent-tool.com/trouble/badmem.html

    The -X- in the error-code can be any number, -S- marks the position of
    the memory socket, -Y- determines the module type, size and access-speed

    00021100 Configuration Mismatch
    00021110 J11/J1 0 - Parity, 4MB???, 80nS
    00021120 J11/J2
    00021130 J11/J3
    00021140 J11/J4
    00021150 J14/J1
    00021160 J14/J2
    00021170 J14/J3
    00021180 J14/J4

    Houston, we have a problem. Empirical evidence says 2MB works, and
    that's it.

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