Re: [Etherboot-developers] Help on Booting WinME DOS

[<kf1...@hk...>]

Reply to: Anselm Martin Hoffmeister=20
<ans...@gm...>:

> > Hi,
> >=20
> > I experience problem of booting WinME DOS as its
> IO.SYS=20
> > loading HIMEM.SYS automatically. This conflicts
> with the=20
> > initial ramdisk installed at or above 1M in High
> Memory=20
> > Area.
>=20
> In former DOS versions, there was a switch to
> himem.sys called /testmem:off.
> IIRC, himem.sys is loaded automagically always
> _after_ config.sys if it had
> not been specified. I have no mileage on WinME, but
> I believe on Win98 you
> could simply enter
> DEVICE=3DC:\windows\himem.sys /testmem:off
> and it did exactly this.
> This way you could avoid your RAM  be "checked",
> which should preserve the
> ramdisk.

Thank you.
The /testmem:off switch does not work with WinME DOS.

> =20
> > If we could install the initial ramdisk in Low
> Memory Area,=20
> > may be we can withstand the automatic testing of
> High=20
> > Memory Area by the HIMEM.SYS loaded up by IO.SYS.
> Possible in theory.  The problem I see is that
> MS-DOS uses the Lowmem area
> without asking, so it could load e.g. command.com
> right there and you couldn't
> even say "zap" before your virtual disk is nuked.
> =20
I think we ought to test it out if the problem exists. It=20
depends on which part of the 640K DOS uses and which part=20
of the 640K the ramdisk is installed.

> > So is it possible to install the initial ramdisk
> in the=20
> > first 640K of the Low Memory Area?
>=20
> If you like, read the documentation about the NBI
> format, shipped along with
> etherboot.

Could you give a hint which file it is in?

Thanks a lot indeed!

Best wishes,
Johnson CHEN
> =20
> Anselm Martin Hoffmeister
> <an...@ho...>
>=20
> --=20
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>=20
>=20


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