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  • Coherent on QEMU is now acceptably fast.

    From Udo Munk@21:1/5 to All on Sun Jan 7 16:24:41 2018
    Booting now is very fast, the harddisk emulation is working OK now, but the CPU's are not:

    https://youtu.be/UKLVO5N31HI

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  • From Udo Munk@21:1/5 to All on Thu Apr 26 12:33:14 2018
    QEMU 2.12.0 is released, installed it on OSX and did a few tests. COHERENT 4.2 boots very fast,
    but still the odd errors with the MWC compiler. The vgalib graphics programs run very fast,
    seems that the VGA hardware was improved some.

    This release also boots COHERENT 4.0.1 and 4.0.1r68 (DDK version), but not the later
    r74 upgrade, HD controller not working.

    NEW: The COHERENT 3.2 image boots in one second, now that is fast. For 3.2 I'm using:

    -----
    #!/bin/sh

    exec qemu-system-i386 -cpu 486 -M isapc -vga std -drive format=raw,file=$HOME/coherent/qemu-coherent-3.2.img -m 2 &
    -----

    I've not tried to access floppy disk drives etc. more testing is needed sometime...

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  • From Udo Munk@21:1/5 to All on Thu Feb 14 13:07:32 2019
    QEMU 3.1.0 still has a buggy CPU. Is not related to the 4.x monolithic compiler, the
    traditional 16bit compiler running the passes connected via pipes shows the same problem.

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  • From Udo Munk@21:1/5 to All on Tue Sep 29 04:56:30 2020
    In QEMU 5.1 the buggy CPU was fixed, this version now runs 3.2 and 4.2 OK without
    compilers/interpreters aborting with errors.

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  • From Nils M Holm@21:1/5 to Udo Munk on Tue Sep 29 12:20:51 2020
    Udo Munk <[email protected]> wrote:
    In QEMU 5.1 the buggy CPU was fixed, this version now runs 3.2 and 4.2 OK without compilers/interpreters aborting with errors.

    Must be a recent bug! I am running QEMU 0.11.1 and never had any trouble
    with any of your images or various compilers and interpreters.

    --
    Nils M Holm < n m h @ t 3 x . o r g > www.t3x.org

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  • From Udo Munk@21:1/5 to Nils M Holm on Tue Sep 29 10:39:48 2020
    On Tuesday, September 29, 2020 at 2:20:54 PM UTC+2, Nils M Holm wrote:
    Udo Munk <[email protected]> wrote:
    In QEMU 5.1 the buggy CPU was fixed, this version now runs 3.2 and 4.2 OK without compilers/interpreters aborting with errors.

    Must be a recent bug! I am running QEMU 0.11.1 and never had any trouble
    with any of your images or various compilers and interpreters.

    --
    Nils M Holm < n m h @ t 3 x . o r g > www.t3x.org

    The problem was with releases 2.x - 5.0, I made a video showing the problem: https://youtu.be/UKLVO5N31HI
    C compilers aborted, Basic interpreter aborted ...

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