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K6-2 cache and Win 95

  • Windows
Last response: in Windows 95/98/ME
April 3, 2001 5:36:19 PM

I recently upgraded from a pentium 133 to a K6-2 400 MHz.
I formated the c: drive partition and reinstalled windows.
About 95% of the time, when windows 95 OSR2 is loading, it comes up with a Windows protection error when loading "IOS" or a protected memory error. The only way I can fix this is by diabling my level 1 cache in the BIOS. Unfortunately, this slows down the computer. I'm really hoping this doesn't mean I have a bad chip. I thought that "maybe" the online retailer screwed me by overclocking a lesser CPU to 400 MHz. I can't check this because the heatsink/fan was glued unto the CPU. I remember a program that will tell you your chi speed rating. Can't remember though. What do you guys think?
I have a
ECS P5TX-Bpro w/ AMD K6-II 400Mhz
64 Megs EDO 70ns DRAM
Matrox Mystique 4 Meg
Soundblaster 64Gold
3COM 10/100 905B-TX
SCSI card for UMAX Astra 1200S


More about : cache win

April 3, 2001 8:28:20 PM

Well, here's a start if you haven't done this yet.

Might find the necessary info in the Troubleshooting pages for Win95.

The document you want is:

Troubleshooting Windows 95 Startup Problems and Error Messages.

This is the link (what a link..!): and shutdown&rnk=10&src=DHCS_MSPSS_gn_SRCH&SPR=W95 and shutdown&rnk=10&src=DHCS_MSPSS_gn_SRCH&SPR=W95

Hope this helps...

Computer quit?
Go do something useful...
April 3, 2001 10:55:05 PM

This is a well documented problem, a timing exception in IOS.VXD, there is a patch to fix it.

Go to...

It applies to Win '95 OSR2 and any AMD K6 processor at 350mhz or above.

I suspect your processor is fine, not sure about running EDO memory on a K6/2 400 though...
Related resources
April 3, 2001 10:58:06 PM

Oh, forgot to mention.

You may want to underclock your processor to 300mhz, so you have a stable system while installing the patch.
April 6, 2001 7:24:38 PM

I had the exact same problem with a K6-2 500MHz. Don't change your multiplier, change your bus speed from 100MHz to 66MHz so your system is running at 266MHz. Then go to, download and install the patch. Change the bus back to 100MHz and you'll be fine again.

~ I'm not AMD biased, I just think their chips are better. ~