When using the AMD K6-2/350 or higher with Windows 95 OSR2.0, OSR2.1 or OSR2.5, the following problems could come up:

• Device IOS failed to initialize
• Windows Protection Error.
• You are asked to reboot your computer.

These problems can be fixed by a special patch released by AMD.

How to Install

1. Copy the file AMDK6UPD.EXE into an empty folder, and run this patch to install
2. 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.
3. Restart the computer for the changes to take effect.

Please note that this problem is intermittent, does not happen on all systems running the above combination and will surely not happen on Windows 95 retail version, Windows 98 or Windows NT version.

For more information see AMD's website.

5AGM Dipswitch/jumper settings for AMD K6(-2) 300

2.2V core voltage	66MHz busspeed	Multiplier 4.5
JP10	JP3 2-3 JP4 1-2 JP5 2-3 68MHz: 1-2/1-2/1-2	JP6 2-3 JP7 2-3 JP8 2-3

5AGM(2) Complete Voltage Settings

JP10 for 5AGM0 or JP4 for 5AGM2

Core Voltage	Jumpersetting JP10	Remarks
2.0V	0 0 0 0 0
2.1V	1 0 0 0 0
2.2V	01000	AMD K6(-2) 266/300/..
2.3V	11000	Overclocking AMD K6(-2) 266/300/...
2.4V	00100
2.5V	10100
2.6V	01100
2.7V	11100
2.8V	00010	Intel MMX
2.9V	10010	Overclocking Intel MMX AMD K6 166/200
3.0V	01010
3.1V	11010
3.2V	00110	AMD K6 233 (early version)
3.3V	10110	AMD K6 233 (later version)
3.4V	01110	Overclocking AMD K6 233
3.5V	11110

5AGM(2) Complete Multiplier Settings

JP3~5 for 5AGM0 or JP8~10 for 5AGM2

About 66MHz / 100MHz / PC100 DIMM Modules

66MHz DIMM modules cannot be clocked at 100MHz. However, in order to enable users with 66MHz DIMM modules to (continue to) use their 66MHz DIMM modules while running the CPU at 100MHz CPU busspeed, the 5AGM2 provides a solution which links the memory bus to the AGP bus instead of the CPU bus. This mode is called asynchronous mode and can be enabled by setting jumper JP11 to pins 2-3 (default is 1-2 =   synchronous to the CPU bus). You can also find this information in the 5AGM2 manual in section 2-6 Main Memory Configuration.

The AGP busspeed will be 2/3 of the CPU busspeed at 100MHz, which is 66MHz. When running at CPU busfrequencies under 100MHz the AGP bus will be the same as the CPU busspeed. PCI and IDE busspeeds will be 1/3 of the CPU busspeed at 100MHz and 1/2 the CPU busspeed at 66/68/75/83Mhz.

There are a lot of SDRAM DIMM modules on the market which are sold as 100MHz DIMM modules or 100MHz SDRAM modules. Most of these modules, however, will not be able to run stable at speeds higher than 83MHz. If you want to run your CPU at 100MHz (for example, K6-2 300) and you want to clock your memory bus also at 100MHz, then it is necessary to use PC100 memory modules. Only PC100 guarantees the ability to run at 100MHz.

5AGM(2) Installation under Windows 98

(from VIA website)

• Step 1 Go into BIOS setup and enable USB

• Step 2 Install Win98 on your system

• Step 3 Download and install the VIA IrQ routing miniport driver

  Version 1.1 VIRQ11.ZIP on Chaintech FTP

  Check for latest version VIRQ11.ZIP on VIA Website

  Please note: the latest drivers will always appear on the VIA website first

• Step 4 Download and install the VIA AGP driver

  Version 2.8 VIA AGP Driver on Chaintech FTP

  Check for latest version VIA AGP Driver on VIA Website

5AGM(2) and i740 based AGP cards

Both the 5AGM and 5AGM2 can work fine with i740 based AGP cards. Please make sure to use the latest VIA AGP driver. The 5AGM0 was shipped with an older version which does not support the i740.

Attention:
If you are using the latest drivers but still have problems with the 5AGM(2)-i740 AGP card combination then disable the  CACHE RD+CPU WT PIPELINE and READ AROUND WRITE options in the BIOS setup.

5AGM(2) and Hauppauge WinTV card

According to Hauppauge, their WinTV cards are only guaranteed to work stable on Intel chipset based boards. Some users have reported that the card can work properly, however, when an AGP card is used as the display adapter.

5AGM(2) and CD Writers

Some users have complained about problems with their 5AGM2 boards with CD Writers, especially after installation under Windows 95. VIA is constantly working on these problems and will constantly post new drivers onto their website. According to VIA, uninstalling the VIA IDE busmaster driver and using the Windows standard default driver can solve the problem.. For users who are using the retail version (original) of Windows 95 an upgrade to Win95 OSR2 or Win98 is advised to take advantage of IDE and UDMA transfers.

Some users have reported when using an incompatible CD writer, it is still necessary to run the installation program for the VIA IDE driver, after which they ran the uninstall program. Only after going through this sequence the system would work properly.