Re: [Qemu-devel] Problem with DOS application and 286 DOS Extender application

[Gerhard Wiesinger <lists@wiesinger.com>]

On Tue, 13 Apr 2010, Roy Tam wrote:

> 2010/4/13 Gerhard Wiesinger <lists@wiesinger.com>:
>> Hello,
>>
>> I'm having a problem with a DOS application which uses a 286 DOS Extender,
>> error message is as the following:
>> unable to create task for execution
>> Interrupt 10 (Ah) while creating task: Invalid task segment selector.
>> Happens with QEMM386 and HIMEM.SYS/EMM386.EXE.
>>
>> I guess the application does at this point swithing to 286 protected mode
>> and trying to move conventional memory up to EMS memory.
>>
>> Issue is NOT present under VMWare Server 2.0 and with real hardware.
>>
>> DOS; MS-DOS 6.22
>> QEMU: 0.12.3 under Fedora 11, 2.6.30.10-105.2.23.fc11.x86 on AMD Phenom II
>> Quad Core, x86_64-softmmu.
>>
>> Any comments or ideas (I guess something with protected mode and MMU might
>> be wrong)?
>>
>
> You need to mention the program name so that people can try to
> reproduce the bug.
>

It is a non public, proprietary application which uses the Ergo Computing 
286 DOS Extender. I guess some other application which use the same DOS 
extender have the same problem. So best thing is to find another 
application which uses the Ergo Computing 286 DOS Extender, too.

Ciao,
Gerhard

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