Re: [Qemu-devel] SeaBIOS regression

[Thomas Huth]

On 2019-02-05 08:52, Gerd Hoffmann wrote:
> On Mon, Feb 04, 2019 at 04:10:37PM +0100, Thomas Huth wrote:
>>
>>  Hi Gerd,
>>
>> I noticed that certain FreeDOS images are not working correctly anymore
>> with the current version of QEMU, for example
>> http://www.qemu-advent-calendar.org/2016/download/day10.tar.xz ... It
>> aborts with:
>>
>>  Error reading from drive C: DOS area: write-protection violation attempted
>>
>> I've bisected the issue, and it has apparently been introduced with:
>>
>>  cd1bfd5ef336166b275a09dc9842542bf5e63ae3
>>  seabios: update bios and vgabios binaries
>>
>> Any idea what might be going wrong here?
> 
> Hmm, no.  bisect seabios?

I haven't bisected yet, but it seems to be related to CONFIG_ATA_DMA=y
in our roms/config.seabios-128k config file. When I switch that to "n",
then the old FreeDOS disks are working again...

 Thomas