Tony,
In your Linux VM, could you give the output to `fdisk -l /dev/sda`?
Thanks
On Sat, Jun 4, 2022 at 7:54 AM Tony Richardson <richardson.t...@gmail.com>
wrote:
> I wanted to use GRUB to boot FreeDOS. (I wanted to use it so that I could
> dual-boot FreeDOS and RTEMS, but others may have different reasons.) It is
> a relatively short procedure so I thought I would contribute it to the
> mailing list in case others might be interested. I installed FreeDOS in a
> VirtualBox virtual machine, but the procedure should work on other
> virtual or physical machines. The FreeDOS fdisk does not leave enough space
> before the first partition to install GRUB, so I used a Linux SystemRescue
> CD (system-rescue.org) to partition the (virtual) disk. This CD has all
> of the tools necessary to partition the drive, format the disk and install
> GRUB.
>
> 1) In VirtualBox create a new 64-bit Linux machine with a 500 MB vdi-type
> drive (FreeDOS.vdi). Configure the machine to boot off of the SystemRescue
> CD image. (I had to give the machine 2 GB of memory to boot the CD. The
> default 512 MB would not allow the machine to boot.)
>
> 2) Boot the new machine and create a new maximum size primary partition on
> the virtual drive (/dev/sda). Change the partition type to 0x0E (a Win95
> LBA mapped partition).I use Linux fdisk (enter "fdisk /dev/sda") to do
> this, but you can use any of the other disk partitioning tools on the CD
> (gparted is a graphical partitioning tool).
>
> 3) Format the new partition by entering "mkfs.msdos /dev/sda1" (You can
> alternately format the partition as part of the FreeDOS installation.)
>
> 4) Halt the Linux machine. (Choose the "Power off the machine" option.)
>
> 5) Create a new FreeDOS virtual machine. Choose to use an existing
> virtual hard disk and attach the FreeDOS.vdi disk. Boot the machine from
> the FreeDOS live image. Choose the "Install to Harddisk" option from the
> boot menu. Install FreeDOS. You should be able to boot off the harddisk
> into FreeDOS at this point.
>
> 6) Halt the FreeDOS virtual machine.
>
> 7) As part of the installation the FreeDOS master boot loader is
> installed. We need to rewrite this with GRUB, so restart the Linux machine.
>
> 8) Mount the new partition using "mount /dev/sda1 /mnt"
>
> 9) Install Grub by entering "grub-install --boot-directory=/mnt/boot
> /dev/sda"
>
> 10) Create a file named "grub.cfg" in the /mnt/boot/grub directory with
> the following contents:
> menuentry "FreeDOS" {
> insmod chain
> set root=(hd0,1)
> chainloader +1
> }
>
> 11) Halt the Linux machine.
>
> You should now be able to boot the FreeDOS machine off of the hard disk.
> You should see the GRUB boot menu first now. You can modify the GRUB menu
> by editting the grub.cfg file in the C:\boot\grub directory. You can
> delete the Linx machine, but do not delete the files associated with the
> machine or you will lose your FreeDOS drive. You can move the FreeDOS.vdi
> file if you want but you will need to play around with the VirtualBox Media
> Manager to make it available to FreeDOS after the move.
>
> Tony Richardson
>
> _______________________________________________
> Freedos-user mailing list
> Freedos-user@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/freedos-user
>
_______________________________________________
Freedos-user mailing list
Freedos-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/freedos-user
