On Mon, 16 Sep 2019 00:07:50 +0200
Eric Auer <e.a...@jpberlin.de> wrote:

> Hi Jon,
> 
> for your advanced multi boot project, you could boot FreeDOS
> from floppy and use the SHSU... drivers to open the ISO file
> of the install CD as if it were a CD drive, after using your
> Windows or Debian to copy the ISO to your DOS/Win95 harddisk.

Unfortunately, the ISO would very nearly fill up that partition. While I'm not
using any such software now, I had at one point had at one point been playing
with ancient software on the machine in question that choked on HDDs over 8 
GiB, 
and the largest disk I had under that limit was 4 GiB, so all three systems on
the disk have fairly limited storage available. I've got a fair number of old
DOS games installed on the DOS partition, so space is even more limited. If I
put the ISO on that partition, I wouldn't have any space left to unpack 
anything.

Now, I could prune stuff off the partition or move it to one of the other
partitions, or I could get a screwdriver, image the disk to a larger HDD and
then expand all the partitions out, so it's not that I absolutely can't drop the
ISO in and mount it, but given the time and effort involed in those courses of
action I do want to be sure that freeing up disk space and dropping the ISO in
is my best option before I commit to either variant of that action.

> The ISO has plenty of ZIPs to use with the package manager,
> but you will be unable to see most of the apps which do the
> install process, as those are in a boot disk image inside a
> separate area of the ISO ;-)

As an alternative to booting from the FreeDOS installer floppy and mounting the
ISO, can you comment on the feasibility of unpacking the package manager into 
the
existing MS-DOS installation and working from the CD, given that MS-DOS is not
having any trouble with the CD drive? What minimal package set would I need to
unpack manually? I assume FDNPKG, anything else? Is there any configuration that
I'd need to do to point it at the install CD?

> You can manually use the package manager to install the FreeDOS
> packages of your choice to some FreeDOS specific directory on
> your harddisk and you can use special options of SYS to create
> a FreeDOS boot sector file and then add that file to your boot
> menu, such as GRUB, instead of using SYS the normal way which
> would overwrite your MS DOS or Win95 boot sectors.
>
> I would NOT use the normal install script, as that does not have
> specific precautions to behave well in a system such as your PC
> which has already 2 MS "DOS" style operating systems installed.

Good to know. I don't know how common paralell DOS installs like what I'm
planning are, but but given the fdauto.bat/fdconfig.sys convention they
don't seem to be entirely unanticipated, so it might be good for FreeDOS to
have an installer, or at least a standardized, how-to-ized manual install
procedure for that use case.

Likewise, given that I've found a separate Linux partition to be a very nice
administrative environment for a DOS install on bare hardware, and the fact that
the VM/emulation use case seems to be one that's forseen for many FreeDOS
installs, it might be good to have a userspace installer for *nix and/or Win32
that can install FreeDOS with a user-selected package set to an empty FAT
filesystem, either in a parition or an image file (let's
call the concept "supersys").

Jon Brase



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