I ran qemu 1.0.1 and the latest SeaBIOS (from the git) with the following options :

qemu-system-i386 -L git/bios -fda disk.img -no-fd-bootchk -boot a -m 16

Here is the log :

https://docs.google.com/open?id=0B7mz0vq6Rpb7UE1ibjJDcEhTRWlNV050QnMyMWwtZw

Here is the floppy disk image I used :

https://docs.google.com/open?id=0B7mz0vq6Rpb7bHpYaEt2SnVUUi1KaWE3a3lBQUJpQQ

The floppy disk is simply a C-DOS 720 Ko floppy created by "format a: /s". So it's quite empty.

Qemu doesn't crash or freeze. But I can just type a single character and the nothing else. But the system is still running (there is a clock at the bottom right of the screen).

Thanks,

Alain

De : Kevin O'Connor <kevin@koconnor.net>
À : Alain Ribière <alain_ribiere@yahoo.com>
Cc : "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>; seabios@seabios.org
Envoyé le : Mercredi 7 mars 2012 14h38
Objet : Re: [Qemu-devel] Regression: more 0.12 regression (SeaBIOS related?)

On Tue, Mar 06, 2012 at 09:00:55AM -0800, Alain Ribière wrote:
> Hello,
>
> I'm reacting a bit later but I have a trouble with an old DOS OS from Digital Research called Concurrent DOS.
> It worked fine till Qemu v0.11.1.
> I tried it with a lot of versions from 0.12.0 to 1.0.1 and it boot correctly. But after a key pressed, I can't use the keyboard any more. The system is not freezed (there is a clock in the bottom side of the screen which is running) but I can't use the keyboard any more.
> It worked also with 0.12.0-rc1 and the PC-BIOS. It seems that with Seabios it doesn't work any more but PC-BIOS is no longer supported by QEMU (from v0.12.0).
>
> Do you know what can I do ?

You can help debug the issue so it can be fixed in SeaBIOS. Start
with producing a log from SeaBIOS by adding (on a recent qemu) the
following to the command-line:

-chardev stdio,id=seabios -device isa-debugcon,iobase=0x402,chardev=seabios

Also, if there is an image available for download, other developers
can take a look at it as well.

-Kevin