[SeaBIOS] WfW setup and DOS display.sys hanging

[Kevin O'Connor]

On Wed, Feb 05, 2014 at 02:19:58PM +0100, Gerd Hoffmann wrote:
> On Di, 2014-02-04 at 20:47 +0100, Kevin Wolf wrote:
> > Hi Gerd,
> > 
> > Am 09.01.2014 um 00:20 hat Sebastian geschrieben:
> > > Hi,
> > > 
> > > I noticed in newer versions of Qemu (Debian Jessie) a regression
> > > causing DISPLAY.SYS from MS-DOS 6.22 to hang the system as soon as
> > > loaded.
> > 
> > now that you sent a pull request for a SeaBIOS update, I tried what
> > would happen with this one. Sadly, while it does fix my hanging Win 7
> > boot, DOS still hangs while loading display.sys.
> 
> [ This is http://www.kraxel.org/cgit/qemu/tag/?id=pull-roms-1
>   with the 1.7.4 update ]
> 
> Digged out my prehistoric msdos floppy images.  Can confirm the hang.
> Using default vga (i.e. cirrus).

I can't reproduce the hang with the dosidle program linked by
Sebastian.  (I ran the program on freedos and on an msdos floppy and
both times it said it install succesfully.)  Can someone walk through
the steps needed to reproduce the problem?

Also, logs from "-chardev stdio,id=seabios -device
isa-debugcon,iobase=0x402,chardev=seabios" would be useful.

-Kevin