Has this issue been resolved with the NightDos kernel?
On Mon, May 30, 2016 at 5:33 PM, Eric Auer <e.a...@jpberlin.de> wrote:
>
> Hi!
>
> > As you maybe know the MSDOS is not able to boot from 81h drive. Even if
> you
> > run the bootsector using bootmanager the IO.SYS is not able to load
> itself
> > and work.
>
> This is a MS DOS specific problem because there, the kernel is 2 files.
>
> > In FreeDOS kernel (tried with 2041) it is quite different because it
> > succesfully boots from 81h drive but (FD)CONFIG.SYS is loaded from the
> > first primary partition on 80h drive. The same with AUTOEXEC.BAT.
>
> Almost correct: You can put command.com options in config.sys to tell
> it that autoexec.bat is at another location in FreeDOS command.com :-)
>
> > The C:\ partition is on 80h drive although it was not the boot drive.
>
> As far as I know, that is intentional. C: by definition is the first
> DOS partition on the first (according to BIOS numbering) harddisk :-)
>
> > So my question is if this behaviour is planned or not. For my needs
> > is this OK but isn't it a bug?
>
> I think this is intentional. It would be interesting to know if the
> kernel can be configured (with FreeDOS SYS, you can patch some flag
> bytes in FreeDOS kernels) to use the boot drive as C:, instead of
> the BIOS 80h drive. After all, the boot sector can pass the number
> of the boot drive to the kernel using registers, so it could work.
>
> > And we should test if the KERNEL.SYS from 81h drive is loaded complete.
>
> The FreeDOS kernel is only one file, so yes, it is completely loaded :-)
>
> Cheers, Eric
>
>
>
>
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