I haven't gotten around to poking at SeaBIOS yet, I'm still wondering how to test my large floppies.

Syslinux appears to install to them fine, but QEMU doesn't seem to like booting them with -fda.

Do you guys have any suggestions on how to test booting the large floppy images?


Mike Banon <mikebdp2@gmail.com> schrieb am Mo., 15. Apr. 2019, 05:35:
Personally I think that either this guy did something incorrectly or
there's a Windows 3.1 bug. Meanwhile, Rafael's Linux-based OS is going
to boot from this floppy like it's a ramdisk, so hopefully should be
indifferent to the custom floppy sizes and would work. I share the
same hopes for KolibriOS: although its' 1.44MB floppy contains really
a LOT of stuff, some cool things like console emulators didn't fit -
so I'm going to create the extended Kolibri floppy version, which will
be either 2.88MB or some custom ( 1.44MB * X ) size.

On Sun, Apr 14, 2019 at 6:12 PM Kevin O'Connor <kevin@koconnor.net> wrote:
> On Fri, Apr 12, 2019 at 11:38:52AM -0700, Rafael Send wrote:
> > Hi,
> > I'm working on stuffing a bootable Linux distro into coreboot.  In QEMU I
> > already succeded by using coreboot's built-in kernel loading mechanism, but
> > that's without SeaBIOS.
> >
> > I'd love to have it as a SeaBIOS payload so I can also boot other things,
> > but I guess I'd have to create a custom-sized floppy image for this or
> > figure out how to create an ELF payload out of a Linux kernel (I'm open to
> > either, but I wasn't able to find any documentation on the ELF method).
> >
> > The guy who put Win 3.1 in coreboot attempted the floppy method, but
> > according to his article he did not find success with this method due to
> > unknown and complex issues in the floppy-side logic of SeaBIOS.
> >
> > So, I'm making the question explicit: What would it take to support
> > custom-sized floppy images? In particular, I'm thinking of a 16MB device...
> My vague recollection is that various OSes had hard coded expectations
> on the types of floppy drives supported.  I did not think it would be
> easy to support a floppy size larger than 2.8MB.
> It is possible to emulate a hard drive in memory.  However, that would
> require code changes.
> Cheers,
> -Kevin
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