CBFalconer wrote:
> Any PC powers on (or after hard reset) to running the 8086
> instruction set,

Tell that to my AT&T 7300 Unix PC.  :-)

Bill Leary escribi�:
> 
> And there were NEC V20's which were 8088 pin compatible but had the 
> 80186 instruction set.  There were computers built with these, and they 
> were used as "drop in" upgrades for 8088 systems since they used fewer 
> clock cycles for quite a few instructions.  I think it was the same deal 
> with the V30 as an 8086 replacement.
 >

NEC V20 was a good 8088 replacement, but, IIRC, the LOCK instruction 
behaved differently. That was an issue if you were doing 
multiprocessing... or am I wrong, and the different behaviour was in the 
80386?

Neeraja wrote:
> 
> Can anyone suggest if there is any software emaulator available
> for 80c186 microproceesor where the application can be made to
> run and tested on PC as if running on the actual 80c186
> microprocessor chip?

Any PC powers on (or after hard reset) to running the 8086
instruction set, plus some things.  The bios then normally converts
the CPU mode to running other things.  If you replace the bios, you
can avoid this and just use the 80186.

The so-called DOS-mode operation is the reverse, and lets you reach
the 8086 instruction set from the more powerful modes.  This may
not be perfect, but you can try it.

The 80186 adds some i/o operations etc to the 8086 instruction
set.  See the data sheets.

-- 
 [mail]: Chuck F (cbfalconer at maineline dot net) 
 [page]: <http://cbfalconer.home.att.net>
            Try the download section.


** Posted from http://www.teranews.com **

"Chris H" <chris@phaedsys.org> wrote in message 
news:QB+S2KCBzzLIFAhp@phaedsys.demon.co.uk...
> In message <slrng2trbh.325.andrews@sdf.lonestar.org>, Andrew Smallshaw 
> <andrews@sdf.lonestar.org> writes
>>On 2008-05-17, Neeraja <neeraja.kothala@gmail.com> wrote:
>>>
>>> Can anyone suggest if there is any software emaulator available for 
>>> 80c186
>>> microproceesor where the application can be made to run and tested on PC 
>>> as
>>> if running on the actual 80c186 microprocessor chip?
>>
>>I think you need to be much more specific as to what you are looking
>>for.  After all, a PC will happily run 80186 code natively.
>
> Are you sure?
>
> AFAIR (without checking)  I think the 186 has some oddball stuff in the 
> interrupts.   The only Windows that ran on 186 PC's had to be adjusted.
>
> AFAIK the ONLY 186 PC's in the world were the Research Machines Nimbus in 
> the UK Most UK schools had them and they had Non-standard windows.  I am 
> sure it was two of the interrupts were different

I recall there was the Tandy 2000 and some early palm-tops, such as the 
HP200LX.

And there were NEC V20's which were 8088 pin compatible but had the 80186 
instruction set.  There were computers built with these, and they were used 
as "drop in" upgrades for 8088 systems since they used fewer clock cycles 
for quite a few instructions.  I think it was the same deal with the V30 as 
an 8086 replacement.

I also recall something odd about the interrupts.  Also, I thought that 
there were one or two op-codes on the 186/8 that got assigned to different 
instructions on the 286 and later.  I haven't, found anything concrete about 
either point online, but I also haven't looked all that hard either.

    - Bill

In message <slrng2trbh.325.andrews@sdf.lonestar.org>, Andrew Smallshaw 
<andrews@sdf.lonestar.org> writes
>On 2008-05-17, Neeraja <neeraja.kothala@gmail.com> wrote:
>>
>> Can anyone suggest if there is any software emaulator available for 80c186
>> microproceesor where the application can be made to run and tested on PC as
>> if running on the actual 80c186 microprocessor chip?
>
>I think you need to be much more specific as to what you are looking
>for.  After all, a PC will happily run 80186 code natively.

Are you sure?

AFAIR (without checking)  I think the 186 has some oddball stuff in the 
interrupts.   The only Windows that ran on 186 PC's had to be adjusted.

AFAIK the ONLY 186 PC's in the world were the Research Machines Nimbus 
in the UK Most UK schools had them and they had Non-standard windows.  I 
am sure it was two of the interrupts were different
-- 
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

On 2008-05-17, Neeraja <neeraja.kothala@gmail.com> wrote:
>
> Can anyone suggest if there is any software emaulator available for 80c186
> microproceesor where the application can be made to run and tested on PC as
> if running on the actual 80c186 microprocessor chip?

I think you need to be much more specific as to what you are looking
for.  After all, a PC will happily run 80186 code natively.

-- 
Andrew Smallshaw
andrews@sdf.lonestar.org

Hi, 

Can anyone suggest if there is any software emaulator available for 80c186
microproceesor where the application can be made to run and tested on PC as
if running on the actual 80c186 microprocessor chip?

Thank you