Very Computer

Windows NT is usually installed after DOS/Windows 9x on a multiboot machine.
What happens if you try to install Win9x after first installing NT ?

Max

Not sure, but I suspect it probably mungs up the boot loader. I know it
does so on a DRDOS/W95 install -- W95 has to be done first, then DRDOS.

~REZ~

Quote:> Windows NT is usually installed after DOS/Windows 9x on a multiboot
machine.
> What happens if you try to install Win9x after first installing NT ?

> Max

You could do that,
if
    1. you don't convert the NT installiation to NTFS, win9X can't read
NTFS.
    2. if you already converted to NTFS then you need a seckond HD.
fi
there are some tools to overide the above statements thoe ..

Quote:> Windows NT is usually installed after DOS/Windows 9x on a multiboot
machine.
> What happens if you try to install Win9x after first installing NT ?

Win95 will overwrite NT's ability to boot.
Win98 shouldn't do this but more often than not it does.
Just ensure you have an ERD to repair the boot.

--
Richard Dakin
+++ No email please +++

I just took a Linux class. And all the people there that
build dual boot boxes say to load DOS, w98, or Linux first,
then NT.    LILO (linux loader) then lets you choose between
LINUX or NT.  The nt loader then takes over from there-

Bill

Quote:> Windows NT is usually installed after DOS/Windows 9x on a multiboot
machine.
> What happens if you try to install Win9x after first installing NT ?

> Max

If you have installed WinNT, and your boot partition (actually, your first
partition, or C:) is FAT, then you can install Win9x or MS-DOS after
installing WinNT - I do it all the time.

First, you boot off of a MS-DOS/Win9x floppy.  You will need only DEBUG.EXE
on the floppy.
Change to C:
Run A:DEBUG.EXE
DEBUG will give you a "-" prompt, at which you type in the following lines:
L 100 2 0 1
N bootsect.nt
RCX 200
W
Q

- this does is load to memory location 100, from the C drive (0 is drive A,
1 is drive B, 2 is drive c), logical sector 0, and only load 1 sector (l
100 2 0 1),
- "N bootsect.nt" sets the current filename you're working with to
BOOTSECTN.NT,
- "RCX 200" loads register CX with the size of current file, which is 200h
bytes, or 512 bytes,
- "W" writes the file to disk (the current directory),
- "Q" exits debug

Now SYS the drive.  This will put the bare minimum files you need to run
MS-DOS on the C: drive (IO.SYS, MSDOS.SYS, and COMMAND.COM).  This ALSO put
a new boot sector on your hard drive.  Next, you need to save this boot
sector to the root of C: as a file called "BOOTSECT.DOS".  Follow the above
DEBUG instructions, substituting in "N bootsect.dos" for "N bootsect.nt".

After this, you need to restore the NT boot sector with DEBUG.EXE.  The
commands are, after starting DEBUG.EXE from the root of C:
N bootsect.nt
L
W 100 2 0 1
Q

This loads bootsect.nt at memory location 100, and writes from that memory
to drive 2, logical address 0, 1 sector.

You now have a "boot drive" that is capable of dual booting.  There is only
one thing left to do.  NTLDR needs to know that you have another OS to
boot, so you will need to modify the file "BOOT.INI" that is in the root of
C: - it's usually hidden, so you'll need ATTRIB.EXE to change the
attributes.  Got to C:, and run "ATTRIB -R -S -H BOOT.INI".  Edit BOOT.INI,
and add the following line under the [Operating Systems] section (append it
to the file):
C:\="MS-DOS"
Save BOOT.INI, run "ATTRIB +R +S +H BOOT.INI", and you're done.

Note: none of the commands I types are case sensitive - I just used upper
case to avoid confusion between letters like i and l.  Also, For the new OS
line you put in your BOOT.INI, the part in quotes can read whatever you
want as it doesn't have to say MS-DOS - it could Windows98, Windows95, or
whatever.

Oh, and one final note.  I always save my NT and MS-DOS/Win98 boot sector
to my loyal boot floppy.  If anything goes wrong, I always have a backup
(i.e. copy BOOTSECT.DOS and BOOTSECT.NT to a floppy disk).  I even save my
MBR, but saving that via DEBUG.EXE is a topic for another day.

the first partition c: is acctually the system partition even though it
contains the boot files.

Quote:> If you have installed WinNT, and your boot partition (actually, your first
> partition, or C:) is FAT, then you can install Win9x or MS-DOS after
> installing WinNT - I do it all the time.

> First, you boot off of a MS-DOS/Win9x floppy.  You will need only
DEBUG.EXE
> on the floppy.
> Change to C:
> Run A:DEBUG.EXE
> DEBUG will give you a "-" prompt, at which you type in the following
lines:
> L 100 2 0 1
> N bootsect.nt
> RCX 200
> W
> Q

> - this does is load to memory location 100, from the C drive (0 is drive
A,
> 1 is drive B, 2 is drive c), logical sector 0, and only load 1 sector (l
> 100 2 0 1),
> - "N bootsect.nt" sets the current filename you're working with to
> BOOTSECTN.NT,
> - "RCX 200" loads register CX with the size of current file, which is 200h
> bytes, or 512 bytes,
> - "W" writes the file to disk (the current directory),
> - "Q" exits debug

> Now SYS the drive.  This will put the bare minimum files you need to run
> MS-DOS on the C: drive (IO.SYS, MSDOS.SYS, and COMMAND.COM).  This ALSO
put
> a new boot sector on your hard drive.  Next, you need to save this boot
> sector to the root of C: as a file called "BOOTSECT.DOS".  Follow the
above
> DEBUG instructions, substituting in "N bootsect.dos" for "N bootsect.nt".

> After this, you need to restore the NT boot sector with DEBUG.EXE.  The
> commands are, after starting DEBUG.EXE from the root of C:
> N bootsect.nt
> L
> W 100 2 0 1
> Q

> This loads bootsect.nt at memory location 100, and writes from that memory
> to drive 2, logical address 0, 1 sector.

> You now have a "boot drive" that is capable of dual booting.  There is
only
> one thing left to do.  NTLDR needs to know that you have another OS to
> boot, so you will need to modify the file "BOOT.INI" that is in the root
of
> C: - it's usually hidden, so you'll need ATTRIB.EXE to change the
> attributes.  Got to C:, and run "ATTRIB -R -S -H BOOT.INI".  Edit
BOOT.INI,
> and add the following line under the [Operating Systems] section (append
it
> to the file):
> C:\="MS-DOS"
> Save BOOT.INI, run "ATTRIB +R +S +H BOOT.INI", and you're done.

> Note: none of the commands I types are case sensitive - I just used upper
> case to avoid confusion between letters like i and l.  Also, For the new
OS
> line you put in your BOOT.INI, the part in quotes can read whatever you
> want as it doesn't have to say MS-DOS - it could Windows98, Windows95, or
> whatever.

> Oh, and one final note.  I always save my NT and MS-DOS/Win98 boot sector
> to my loyal boot floppy.  If anything goes wrong, I always have a backup
> (i.e. copy BOOTSECT.DOS and BOOTSECT.NT to a floppy disk).  I even save my
> MBR, but saving that via DEBUG.EXE is a topic for another day.

The easiest way to achieve this is via the emergency repair disk in NT.
In NT *before* you add Win9* create a ERD via Rdisk.
Have the 3 setup disks to hand updated with Setuppdd.sys as per the service
pack readme.
Install Win9*.
If NT doesn't boot, boot from the 1st NT setup disk & follow the
instructions to repair NT.
Choose to repair the boot only & use the ERD when prompted.
Reboot when finished & you'll have a dualboot.

--
Richard Dakin
+++ No email please +++