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Mac Forum / Applications / Virtual PC / May 2004



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IE displaying 15 decimal places?

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devnull - 18 May 2004 22:52 GMT
I recently installed Virtual PC 6.0 with Windows 2000 Professional on
a new 1.5ghz Powerbook.  In IE on Windows, I'm seeing math
calculations on certain web sites carried out to 15 decimal places.
For example, on the Windows Update site, rather than showing the total
size of selected updates as 348 KB, it will say 348.000000000000001
KB.  This is a major problem when trying to use certain web-based
tools.

I've tried various combinations of updating VPC to 6.1.1, omitting,
then installing the Extras, nothing seems to have any effect.  Does
anyone have any suggestions?
Steve Jain - 19 May 2004 03:18 GMT
This is most likely related to the way VPC maps the floating point of
the Mac to the the emulated PC.  Since they Mac's is smaller, there
can be round off errors like you're seeing.

>I recently installed Virtual PC 6.0 with Windows 2000 Professional on
>a new 1.5ghz Powerbook.  In IE on Windows, I'm seeing math
[quoted text clipped - 7 lines]
>then installing the Extras, nothing seems to have any effect.  Does
>anyone have any suggestions?

Steve Jain, Microsoft MVP for Virtual PC for Windows
Website: http://www.essjae.com
devnull - 19 May 2004 23:38 GMT
Thanks for your quick reply.  Does anyone know if this floating point
issue is known by Microsoft?  Or if this will be addressed in VPC 7.0?
This bug seems to have been introduced with my version of OS X (v
10.3.3 Build 7G43).

Thanks!

> This is most likely related to the way VPC maps the floating point of
> the Mac to the the emulated PC.  Since they Mac's is smaller, there
[quoted text clipped - 14 lines]
> Steve Jain, Microsoft MVP for Virtual PC for Windows
> Website: http://www.essjae.com
Steve Jain - 20 May 2004 02:03 GMT
The bug was known to Connectix and is known to MS.  Its been in VPC
since v4 and at the last report, they fixed it as best they could.

>Thanks for your quick reply.  Does anyone know if this floating point
>issue is known by Microsoft?  Or if this will be addressed in VPC 7.0?
[quoted text clipped - 21 lines]
>> Steve Jain, Microsoft MVP for Virtual PC for Windows
>> Website: http://www.essjae.com

Steve Jain, Microsoft MVP for Virtual PC for Windows
Website: http://www.essjae.com
Gerry Simmons - 26 May 2004 01:13 GMT
I know I've personally been seeing since I bought VPC, which was version
5. I just live with the Windows Update funky. None of the other
web-enabled apps I run seem to run into this.

-Gerry

> The bug was known to Connectix and is known to MS.  Its been in VPC
> since v4 and at the last report, they fixed it as best they could.
[quoted text clipped - 27 lines]
> Steve Jain, Microsoft MVP for Virtual PC for Windows
> Website: http://www.essjae.com
devnull - 28 May 2004 03:29 GMT
It's never impacted anything in the past, but I was hoping to use VPC
to use an IE only web-based application.  The application performs a
check on numbers entered into form fields, and the VPC bug adds about
16 decimal places to anything entered.  There's no way to remove the
extra data, and the web application returns an error, since it can
only deal with whole numbers.  At this point I'm just hoping it will
be fixed in version 7.0.

> I know I've personally been seeing since I bought VPC, which was version
> 5. I just live with the Windows Update funky. None of the other
[quoted text clipped - 33 lines]
> > Steve Jain, Microsoft MVP for Virtual PC for Windows
> > Website: http://www.essjae.com
Benjamin Armstrong [MSFT] - 31 May 2004 20:32 GMT
I don't work on the VPC Mac team - but AFAIK there are no plans to fix this.
Doing so would halve the speed of all floating point operations.

Cheers,
Benjamin Armstrong
==========================
Virtual PC Program Manager
(Windows - not Macintosh)

This posting is provided "AS IS" with no warranties, and confers no rights.
You assume all risk for your use.

On 5/27/04 7:29 PM, in article
e2168235.0405271829.7bd5ae43@posting.google.com, "devnull"
<ciao_sf@hotmail.com> wrote:

> It's never impacted anything in the past, but I was hoping to use VPC
> to use an IE only web-based application.  The application performs a
[quoted text clipped - 41 lines]
>>> Steve Jain, Microsoft MVP for Virtual PC for Windows
>>> Website: http://www.essjae.com
 
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