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    Subjectemm386 hangs when booting from linux


    for some reason, I am using the "switch to 16 bit realmode" function
    present in the linux kernel to execute various 16bit code. One thing
    that I am doing is to read the mbr off a harddisk to 0x7c00 and then
    jump to there. This allows to e.g. "quickboot dos" from linux without
    having to go through bios startup.

    I got this working with *one* exception: as soon as I load emm386
    in config.sys, the system hangs. It doesn't hang completely, e.g.
    the num-lock led changes light when pressing num-lock, and ctrlaltdel
    reboots the system. When I "REM"ark the emm386.exe, then dos will
    boot and display a "C:\>" prompt.

    "machine_real_restart" is in <arch/i386/kernel/process.c> - possibly
    it forgets to reset something particular in the cpu/mmu...and later on,
    emm386.exe will hang the system. Interestingly, DOS4GW will *not* hang
    the system and vertex-inducing games like doom & co. will work like
    a charm (woah ... I haven't been playing doom for ages! <streisand> "memories"

    emm386.exe is about 116k byte, so it's probably not written in asm.
    I've been searching the web for source-code for some emm, but so far,
    no luck. any hint about what could be wrong? maybe I am only 1 bit
    away from success, but I will like searching the bit in the haystack.

    thanks in advance,
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      Last update: 2005-03-22 13:33    [W:0.022 / U:164.828 seconds]
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