Microsoft® Windows® 95 Update for AMD-K6®-2/350
and Above
Patch for Windows 95 OEM SR2 and above
Please note that this patch will not resolve issues associated with any
other versions of Windows 95 other than the OEM SR2 version. If you have
any other version other than OEM SR2, please contact technical
support for further options available to you. To determine the version
that you have on your system, please read below.
If you are not sure which version of Windows 95 you have, you can find
out simply by checking your System Properties. To do this, right mouse
click on "My Computer" and select "Properties". An OEM SR2 system will
show a designator, such as "4.00.9500 B" as the version. The number may
vary slightly, but the letter designator will be a "B" for the OSR2 version.
Version designators without a "B", such as an "A" or nothing after the
number, cannot utilize this patch. For these versions, please contact technical
support for further assistance to resolve this issue.
Problem(s) this Update Resolves
When you are starting Windows 95 OSR2, OSR2.1, or OSR2.5 on a computer
with an AMD-K6-2 processor running at speeds of 350 MHz and above, you
may receive one of the following error messages:
-
Device IOS failed to initialize.
-
Windows Protection Error.
-
You must reboot your computer.
The first error is a result of a divide exception in IOS.VXD, the second
is due to a similar error within ESDI_506.PDR or SCSIPORT.PDR.
This observation is caused by a software timing loop that is sensitive
to processor frequency, and is not a processor erratum. This DOES NOT occur
with Windows 98 or Windows NT®. AMD has worked closely with Microsoft
to enable a publicly available solution which is available below.
This problem is very intermittent at 350MHz. Note that it is necessary
to reboot the computer after the error occurs. If the error does not occur,
the system will run normally.
Microsoft Knowledge Base reference article(s): Q192841 AMD K6-2/350
CPU Windows Protection Error at boot time.
How to Install
-
If you agree with the Software Usage Terms set forth below, please press
the "Accept" button to begin the download process. If you do not agree
with the Software Usage Terms, press the "Decline" button.
-
Copy the file AMDK6UPD.EXE into an empty folder, and run AMDK6UPD.EXE to
install the update.
-
You may be warned that you are about to replace a newer file with an older
version of the file. Generally, you should the keep the newer file, and
choose not to replace it with an older file.
-
Restart the computer for the changes to take effect.
How to Uninstall
-
Using Windows Explorer, locate the file AMDK6_UN.INF in the Windows\INF\QFE
folder, right-click on the file AMDK6_UN.INF, and choose Install.
-
You will be prompted for the Windows 95 installation CD or diskettes. Choose
the appropriate path.
-
You may beprompted to replace the newer file with an older version of the
file. To uninstall this update, choose to Replace the newer file.
-
Restart the computer for the changes to take effect.
File Information
Windows 95 Version 4.00.950 B (OSR 2 & OSR 2.1):
| File |
Version |
Date/Time |
Size |
| ESDI_506.PDR |
4.00.1118 |
09/04/98 11:18 am |
24,426 bytes |
| HSFLOP.PDR |
4.00.1113 |
08/03/98 11:13 am |
25,249 bytes |
| SCSIPORT.PDR |
4.00.1112 |
09/04/98 11:12 am |
23,158 bytes |
| CDFS.VXD |
4.00.1112 |
01/15/97 11:12 am |
59,153 bytes |
| DISKTSD.VXD |
4.00.1112 |
01/15/97 11:12 am |
18,809 bytes |
| INT13.VXD |
4.00.1112 |
01/15/97 11:12 am |
9,955 bytes |
| IOS.VXD |
4.00.1113 |
09/04/98 11:13 am |
68,962 bytes |
| VFBACKUP.VXD |
4.00.1112 |
01/15/97 11:12 am |
18,197 bytes |
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Last Updated 11/30/98
©1998 Advanced Micro Devices, Inc.
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