dosemu bios alarm register

dosemu bios alarm register

[Greifzu, Harald]

Hello,

i use dosemu to run a very old dos program. One feature of this program is that it writes 3Byte into the bios alarm register (70h1,3,5   71h). So with original dos these bytes will be still aviable after restart the computer.
If i close dosemu and start it again these bytes are deleted (00). With the debug i can write like this example :

    -o70 1
    -o71 11

    -o70 3
    -o71 33

    -o70 5
    -o71 55

and read

    -o70 1
    -i71

    -o70 3
    -i71

    -o70 5
    -i71
Is there a possibility that the dosemu did not delete these bytes (dosemu.conf ?)?

best regards

Harald Greifzu

Mit freundlichen Gruessen / Best regards

Harald Greifzu

Schmoll Maschinen GmbH


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Deutschland

Phone +49 (0)6074 8901 - 33
Fax: +49 (0)6074 8901 - 58
E-Mail: greifzu@schmoll-maschinen.de
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Re: dosemu bios alarm register

[Stas Sergeev]

18.09.2012 13:58, Greifzu, Harald пишет:
> Hello,
>
> i use dosemu to run a very old dos program. One feature of this program is that it writes 3Byte into the bios alarm register (70h1,3,5   71h). So with original dos these bytes will be still aviable after restart the computer.
> If i close dosemu and start it again these bytes are deleted (00). With the debug i can write like this example :
>
>      -o70 1
>      -o71 11
>
>      -o70 3
>      -o71 33
>
>      -o70 5
>      -o71 55
>
> and read
>
>      -o70 1
>      -i71
>
>      -o70 3
>      -i71
>
>      -o70 5
>      -i71
> Is there a possibility that the dosemu did not delete these bytes (dosemu.conf ?)?
Write a bat file that will upload your values before
starting your program, and after program exits it will save them
to file.
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