CPU Upgrade:
Getting the AMD K6-2+ / K6-III+ to work on your Super Socket 7 board.

by Jan Steunebrink
Last updated on August 20, 2022

Introduction

The latest, and probably last, editions to the Socket 7 scene are AMD's K6-2+ and K6-III+ CPUs. Although AMD designed these CPUs for the mobile market, they will work in compatible desktops as well. For details about these CPUs, see AMD's web-site.
Availability of these CPUs may be a problem now most stocks are depleted. So you may have to revert to the second-hand market or to internet auction houses like eBay.

To be able to run these babies in your desktop, the motherboard should have the following features:

CPU Core Voltage

The K6-2+/III+ CPU core is designed to run on 2.0V but also runs well on 2.1V.
The absolute maximum Vcore rating is 2.2V, but this is already stressing the CPU and will probably shorten its life span.
On motherboards with 4 Vcore jumpers, the lowest possible Vcore setting of 2.0V is usually selected by taking all 4 jumpers off. I have found that several boards didn't work with this setting and that the next higher setting of 2.1V had to be used to properly run the K6-2+/III+.
There are also (ultra) low power 1.6V - 1.8V versions of the K6plus, designed for embedded fan-less applications. I believe that these low voltage versions use the same 0.18 micron die as the faster 2.0V models and experience shows that they will run fine at 2.0V or 2.1V as well. However when run at 2.0V, they will behave like other K6plus 2.0V versions and will need a cooler/fan, but they will also run faster then.

Front Side Bus

The K6-2+/III+ CPUs are designed for a 100MHz FSB but can also run on a lower busspeed. Because the maximum multiplier for these CPUs is 6, you are limited to 500MHz on a 83MHz FSB, 450MHz on a 75MHz FSB, and 400MHz on a 66MHz FSB.
Unfortunately, boards without 100MHz support have almost never K6-2+/III+ BIOS support and the older 66/75 MHz boards often lack the 2.0V or 2.1V Vcore setting. So this page focuses mainly on support for the 100MHz Super Socket 7 platform, but I will include other boards when possible.

K6plus BIOS Support

Below are two tables with Socket 7 board BIOSes. The first table lists BIOSes that already have K6-2+/III+ support as provided by the motherboard manufacturer. Because most manufacturers pages for these socket 7 boards are gone now, the Download link allows you to download the BIOS directly from this site.
This list is followed by a second table that lists boards for which a Patched BIOS is available.

If you have a board for which no K6plus aware BIOS is available, or if you don't want to use a patched BIOS, there are other solutions to get the K6-2+/III+ running. Read this Tyan S1590 and the AMD K6-III+ article by Michael McCarrick for further information. The findings presented here will work on most motherboards.

Note that if you want to run a K6plus on a board with the Intel 430TX, 430VX, ALi Aladdin IV(+), or SiS5582 chipset, you may have to set "System BIOS Cacheable" in the CMOS Setup to "Disable" to get it working.

The Award BIOS 32GB HDD limit bug

Apart from K6-2+/III+ support, most BIOSes in the below lists will also have a fix for the 32GB HDD limit bug.

The story:
In 1996/1997, Award Software Inc. put the Interrupt 13h extensions with 28-bit LBA support in their BIOSes. This was done to break the 8GB HDD barrier, so that IDE drives up to 128GB could be supported. But they overlooked a bug that caused the BIOS to hang during POST when a 32GB or larger drive was attached. Later on, also a 64GB limit bug was discovered.
Initially, these bugs went unnoticed but became apparent when 40GB and larger drives came on the market.

The official fix:
Finally, in its September 1999 and later BIOS releases, Award properly fixed these bugs and provided native 128GB HDD support. This fix allowed even larger drives up to 640GB to be attached but the BIOS then only "sees" the first 128GB of that drive due to the limits of the LBA28 interface.

But there is a workaround for this 128GB limit for these late 1999/2000-2003 Award BIOSes. When all code and data to boot the OS is placed in a partition below the 128GB limit, the whole drive can be accessed by a 48-bit LBA capable OS after bootup! (Like Win2000 with SP3 or higher, WinXP with SP1 or higher, Vista or later, or Linux with kernel 2.4.19 or later.)

Note that to fully break the 128GB barrier, you need a BIOS with 48-bit LBA support but these came later in 2004, after the ATA-6 specification was published in 2003. This was too late for the Socket 7 platform and I have never seen an LBA48 BIOS update for socket 7.

All Award BIOSes, except one (Biostar M5ALC), in the first "K6plus BIOS List" below have the HDD limit bugs fixed by Award and fully support these 128GB(640GB) drives.

The community fix:
Back in 2002, when I learned that another BIOS patcher found a fix for the infamous Award 32GB HDD limit bug, I started to use that fix in my patched K6+ BIOSes as well. His name is Petr Soucek and he uses a simple and elegant 15 bytes patch to fix this bug.
He also describes a more elaborate patch for the 64GB limit bugs that I am using as well. An archived version of his website, with a detailed explanation, can be found at web.archive.org/web/20071114220315/http://www.ryston.cz/petr/bios/

These same patches are also used in all patched BIOSes by the Wimsbios team, and team member Rainbow still has these BIOSes available at http://wims.rainbow-software.org/

However, all these patched BIOSes hang during POST when a drive with 267,386,880 or more sectors (127.5GB) is attached. This new limit is a side-effect of the code used in the patch and coincides nicely with the 28-bit LBA limit. So this was of no consequence at the time, until bigger drives (with 48-bit LBA support) like 160GB and 200GB came on the market.

A new community fix:
In 2007 I started looking into the code that Award itself used to fix the 32GB limit bug in late 1999/2000 BIOSes, and I found a way to use this logic to make a new bugfix for 1997/98/99 Socket 7 BIOSes. This new 32GB bugfix uses 32-bit arithmetic (instead of 16-bit) to do the calculations, thereby avoiding a divide overflow at 127.5GB. The new limit for this fix is 640GB, just like in Awards official fix, although the BIOS will still only 'see' the first 127.5GB due to the 28-bit LBA limitation.

After testing this new 32GB bugfix for quite a while, I have now put it in several patched BIOSes. In the Patched BIOS list below, you can recognize these BIOSes by a 128GB(640GB) indication in the Remarks column.

CAUTION: Always follow the BIOS flash procedure from the motherboard manufacturer.

K6plus BIOS List

Manufacturer Model BIOS Rev. BIOS Date Download link Remarks
Acorp 5ALI61 (1Mb) VER:1.5 02/20/2001 5ALI61V15.ZIP This is a beta BIOS from Acer for the 5ALI61 boards with 1Mbit (128KB) flash chip. This BIOS will also work on the RedFox AGP-ALI board but it lacks the option to boot from SCSI first. A patched RedFox VER:1.4 BIOS is available. See the Patched BIOS list below.
Acorp 5ALI61 (2Mb) VER:2.2_33
VER:3.3_66
11/02/1999
02/02/2000
V2.2_33.EXE
V3.3_66.EXE
These BIOSes are for 5ALI61 boards with 2Mbit (256KB) flash chip.
Use the ver 2.x BIOS if your board has an M1543C-A1 southbridge. The ver 3.x BIOS is meant for the M1543C-B1 southbridge.
Amptron PM-599LMR 09/30/2000S 09/30/2000 M599LMR_2K0930S.ZIP This board is the same as the PCChips M599LMR and uses the same BIOS.
There is also a 12/22/2000S (2K1222S or 1K1222L with full-screen Amptron logo) Release, but reports indicate that you need the EN29F002NT flashchip for this BIOS. For other flashchips it is better to use the 09/30/2000S BIOS.
AOpen AX59 PRO R2.35 07/12/2000 AX59P235.EXE  
AOpen MX59 PRO (II) R1.27 07/26/2000 MX59P127.ZIP  
Asus P5A 1011 Beta 005 05/02/2002 1011-005.ZIP Due to a hardware problem, P5A Rev 1.05 and 1.06 will work extremely slow with a K6plus CPU.
Asus P5A-B 1011 Beta 005 05/02/2002 1011b005.ZIP 1011bn005.ZIP Due to a hardware problem, P5A-B Rev 1.05 will work extremely slow with a K6plus CPU. The 1011bn BIOS is for boards without sound.
ATrend ATC 5010M VER:1.0r10A 12/28/1999 501010A.ZIP  
ATrend ATC 5220 2.0 01 GS 10/18/1999 5220201A.ZIP  
Azza PT-5VMD 09/27/2000 09/27/2000 5VMD.ZIP  
BCM VP1541/1543 1.08 03/14/2000 VP1541-108.ZIP The VP1543-108.ZIP file for the VP1543 is identical to this one.
Biostar M5ALC ALC0131B 01/31/2000 ALC0131B.EXE The harddisk support in this BIOS is limited to 32GB. A patched and tested ALC0131B BIOS with 128GB support can be found at Award BIOSes - 32GB and 64GB bugs patched!
Biostar M5SAA SAA0727F 07/27/2000 SAA0727F.EXE  
Chaintech 5AGM2 11/02/1999 11/02/1999 5AGM2B02.EXE  
Chaintech 5ATA 10/15/1999 10/15/1999 5ATA0A15.EXE  
Commate S7AX VER:3.0
VER:3.0A
05/16/2000
05/26/2000
S7AX30.ZIP
S7AX30A.ZIP
The VER: 3.0A BIOS is for upgrading a VER:2.7A. The difference between a normal and an A version is unknown.
DFI K6BV3+   01/15/2001 BK6BA0115.ZIP This beta BIOS is for the K6BV3+ Rev A boards.
DFI K6XV3+   01/15/2001 BK6XA0115.ZIP This beta BIOS is for the K6XV3+ Rev A boards.
DFI K6BV3+/66
K6XV3+/66
  04/12/2000 K6XV30412.ZIP This BIOS is for both the K6BV3+/66 and K6XV3+/66 boards.
DFI P5BV3+ Rev A
P5BV3+ Rev B
P5BV3+ Rev C
  11/30/2000 BP5BA1130.ZIP
BP5BB1130.ZIP
BP5BC1130.ZIP
There are 3 different versions of this beta BIOS. One for each Rev (A, B, or C) of this board.
Epox EP-MVP3C
EP-MVP3C2
EP-MVP3G-M (2Mb)
EP-MVP3G2
EP-MVP3G5
12/21/2000 12/21/2000 VP3C0C21.EXE The EP-MVP3G-M with 1 Mbit flash chip has to be upgraded to a 2Mbit chip to be able to use this BIOS. Check the Epox web-site for more details.
Epox EP-58MVP3C-M 04/11/00 04/11/2000 VP300411.EXE  
FIC PA-2013 JI4333 01/11/2001 JI4333.ZIP This is a beta BIOS
FIC PAG-2130 SA4124
SB4124
01/10/2001
01/10/2001
SA4124.ZIP
SB4124.ZIP
The SA4124 BIOS is for board Rev. 1.2/1.3.
The SB4124 BIOS is for board Rev. 1.3A/2.0.
These are beta BIOSes
FIC VA-503+ JE4333 01/11/2001 JE4333.ZIP This is a beta BIOS
FIC VA-503A JN4116 (with Audio) JO4116 (No Audio) 08/02/2000 JN4116.ZIP
JO4116.ZIP
This is a beta BIOS
Gigabyte GA-5AA F7b 10/25/00 5AA_I_F7B.ZIP The F7b is a beta BIOS (AMI). Note that the F6 BIOS has full K6plus support as well, and is reported to work better on a GA-5AA ver 2.2 board.
Gigabyte GA-5AX F4 09/19/2000 5AX_F4.ZIP  
Gigabyte GA-5SMM F3 05/09/2000 5SMM_F3.ZIP  
IWILL XA100Plus 32211A 10/27/1999 XAP1027.EXE  
Jetway J-530BF E12 04-12-2001 04/12/2001 530BFE12.BIN This BIOS supports K6plus but doesn't enable Write-Allocation on any K6.
Jetway J-542B
J-542BS
D06 10-25-2000 10/24/2000 542BD06.BIN This BIOS supports K6plus but doesn't enable Write-Allocation on any K6.
A patched BIOS with WA support is available. See the Patched BIOS list below.
Jetway J-542C
J-542CS
D06 10-25-2000 10/24/2000 542CD06.BIN This BIOS supports K6plus but doesn't enable Write-Allocation on any K6.
A patched BIOS with WA support is available. See the Patched BIOS list below.
Lucky Tech
(Shing Yunn Enterprises)
P5MVP3 Rev:D 06/14/2000 MVP3_D.BIN  
Lucky Star 5MVP3 #LEB9-01 04/25/2001 LEB9-1.ZIP  
Micronics C200 1.08 03/14/2000 VP1541-108.ZIP Use this BCM VP1541 BIOS for the C200
MicroStar MS-5169 V4.0 V3.5 06/27/2000 A5169V35.EXE This BIOS is only for the version 4.0 boards.
Note that the revision 3.6 and 3.7 BIOSes for this board do not have any K6plus support.
MicroStar MS-5184 V1.3B3 121100 W5184VMS133.ZIP This is a beta BIOS from MSI Tech support.
MicroStar MS-5191 V1.5 122799 A5191V15.EXE  
PCChips M585LMR 11/20/2000S 11/20/2000 2K1120S.ZIP  
PCChips M598 V5/7/8/9 05/19/2000S 05/19/2000 M598LMRv1_2K0519.ZIP This is the M598LMR v1.x BIOS but it works fine on the M598 V5/7/8/9 as well.
PCChips M598LMR V1.x
M598LMR V5
M598LMR V6
05/19/2000S
09/30/2000S
05/31/2000S
05/19/2000
09/30/2000
05/31/2000
M598LMRv1_2K0519.ZIP
M598LMRv5_2K0930S.ZIP
M598LMRv6_2K0531S.ZIP
 
PCChips M599LMR 09/30/2000S 09/30/2000 M599LMR_2K0930S.ZIP There is also a 12/22/2000S (2K1222S) Release, but reports indicate that you need the EN29F002NT flashchip for this BIOS. For other flashchips it is better to use the 09/30/2000S BIOS.
PCPartner/Vtech MVP3BS7-954 BIOS-I-2M (91027)
BIOS-S-2M (91027)
10/26/1999
10/27/1999
P954-2M.ZIP These BIOSes are for P954 boards with 2Mbit flash chip. Select the correct BIOS depending on the Super IO chip installed (ITE or SMC).
RedFox AGP-ALI (2Mb)
VER:2.2_33
VER:3.3_66
11/02/1999
02/02/2000
AGP-ALID.ZIP
AGP-ALI6.ZIP
These BIOSes are for AGP-ALI boards with 2Mbit (256KB) flash chip.
Use the ver 2.x BIOS (agp-alid) if your board has an M1543C-A1 southbridge. The ver 3.x BIOS (agp-ali6) is meant for the M1543C-B1 southbridge.
A BIOS for AGP-ALI boards with 1Mbit (128KB) flashchip is also available. See the Patched BIOS list below.
Shuttle HOT-591P 591PS024 01/31/2001 591PS024.ZIP A pached 591PWIQH BIOS also available. See the Patched BIOS list below.
Shuttle HOT-597 5970S02Z 03/16/2001 5970S02Z.ZIP  
Soltek SL-54U5 REV MVP3-A11b 03/03/2000 54U5A11B.ZIP  
Soltek SL-56H5/56H1 REV M1 03/23/2000 56H-M1.ZIP  
Soyo SY-5EHM 5EH Family-1DA1
5EH V1.3-1DA2 New
05/16/2000
05/16/2000
5EH1DA1.ZIP
EH131DA2.ZIP
There are different versions of the 5EHM. The EH131DA2 BIOS is for the 5EHM V1.3 board only!
Soyo SY-5EMA EMA-1EA1 05/11/2000 5EMA1EA1.ZIP  
Soyo SY-5EMA+ 5EMA+ Family-1EA1 05/11/2000 5EMPVEA1.ZIP  
Soyo SY-5SSM SSM-2DB1 12/16/19999 5SSM2DB1.ZIP  
Superpower SP-A586B VER:A.9 11/29/1999 A586B-A9.ZIP This BIOS supports K6plus but doesn't enable Write-Allocation on any K6.
TMC TI5VGA -E3-1221 12/21/1999 TI5VGAE3.ZIP  
TMC TI5VGF -H7-0330 03/24/2000 TI5VGFH7.ZIP This is a beta BIOS
Tyan S1598 v1.06c
v1.06e
10/04/1999
03/06/2000
V98W106C.EXE
1598106E.ZIP
The v1.06e is a beta BIOS from Tyan and is supposed to have better Win2K/XP support.

Patched BIOS
Below is the list of BIOSes I have patched to include proper K6-2+/III+ support. These BIOSes can be downloaded here and come with a text-file with more information. Please read this file before you flash the BIOS.
Where possible, I've fixed the 32GB Harddisk limit bug in these BIOSes as well. If so, this is clearly indicated in the Remarks column of the table below.

Patched BIOS List

Manufacturer Model Original BIOS Patched BIOS Remarks
Abit IT5H v2.0 01/21/1998-9T coming Request beta testers for this patched BIOS
This patched BIOS adds support for all K6-2/-III models, including the K6plus. However, the lowest Vcore selection is 2.8V (board limitation), so a Voltage Regulator Adapter is needed to run the K6-2/-III/plus.
Abit IT5V v1.0 01/21/1998-CP coming Request beta testers for this patched BIOS
This patched BIOS adds support for all K6-2/-III models, including the K6plus. However, the lowest Vcore selection is 2.8V (board limitation), so a Voltage Regulator Adapter is needed to run the K6-2/-III/plus.
Abit AX5
PX5
11/13/1998-GP none I was unsuccesful patching this BIOS for K6-2/-III/-2+/-III+ support, due to unstable Vcore voltage at lower (2.0V-2.2V) settings on this jumperless board.
Abit TX5 12/03/1998-GN TX5B_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Acorp 5TX29 VER:1.3 5TX29_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Acorp 5VIA77 VER:A5 coming Request beta testers for this patched BIOS.
Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Amptron PM-9100C V5.0 07/02/1999 S 070299J1.ZIP This BIOS is for boards with a 1Mbit (128KB) flash chip.
CAUTION: After installing the K6+ CPU, enter the BIOS Setup at the first boot and set the 'CPU Plug and Play' option to 'User Define', and 'Vcore Voltage' at 2.0V. Not doing so may damage the CPU!
Amptron PM9900 03/09/1999 S 990309J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/550 and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
AOpen AP5T AP5T R1.82 Aug.09.1999 AP5T_J2.ZIP Visit The Enhanced AP5T Home Page, a great page with AP5T-2 and AP5T-3 info.
Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
AOpen AX5T AX5T R1.92 May.28.1999 AX5T_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus P/I-P55T2P4
P/I-XP55T2P4
0207-2 0207_J4.ZIP New Apart from K6plus support, this patched BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB(640GB).
I have a report that the K6-2+ doesn't work on the XP55T2P4 V1.3, but later versions of this board should be okay.
Asus P/I-P55T2P4S 0206-5 0206_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Asus P/I-P55TP4XE(G) New 0302 (12/30/97) coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
Note that a VRM or Voltage Regulator Adapter has to be added to run the K6-2/-III/plus.
Asus P/I-P55TVP4 0204 coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Note that the lowest Vcore selection is 2.7V (board limitation), so a Voltage Regulator Adapter is needed to run the K6-2/-III/plus.
Asus P5S-B
P5-99B
1001b25 1001B_J1.ZIP Both this patched and the original 1001b25 BIOS have full 128GB(640GB) support.
Asus P5S-VM
P5-99VM
1006 1006VMJ1.ZIP Both this patched and the original 1006 BIOS have full 128GB(640GB) support.
Asus SP97-V 0109v-5 0109V_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus SP97-XV 0109xv-5 0109XVJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus SP98AGP-X 0104xl-1
0104x-1
0104XLJ2.ZIP
0104X_J2.ZIP
The 0104XL BIOS is for the SP98AGP-X without on-board audio and the 0104X for boards with audio.
Apart from K6plus support, these "patch J.2" BIOSes have a fix for the 32GB harddisk limit and support IDE drives upto 128GB!
Asus SP98-N 0109n-5 0109N_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TX97 0112-1 0112_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TX97-E 0112e-1 0112E_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TX97-L 0112ld-1 0112LDJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TX97-LE 0112le-1 0112LEJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TX97-X 0112x-1 0112X_J3.ZIP New Apart from K6plus support, this patched BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB(640GB).
Asus TX97-XE 0112xe-1 0112XEJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TX97-XV 0112xv-1 coming Request beta testers for this patched BIOS.
Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus TXP4 0112l-1 0112L_J3.ZIP New Apart from K6plus support, this patched BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB(640GB).
Asus TXP4-X 0112el-1 0112ELJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Asus VX97 0204v 0204V_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Azza PT-5IT 07/17/98 W83977TF 5ITWS_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
Azza PT-5VML 07/08/1999 coming Request beta testers for this patched BIOS.
Both this patched and the original 5vml-070899 BIOS have full 128GB(640GB) support.
BCM FR550 New Rev:M07 06/22/98 coming Request beta testers for this patched BIOS.
Apart from K6plus support, this patched BIOS also supports the original K6-2/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
BCM IN5598 v1.01 (#20811) IN5598J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Biostar M5ATC ATC0811B M5ATC_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Biostar M5ATD ATD0715B M5ATD_J3.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Biostar M5SAF SAF0316F M5SAF_J1.ZIP Both this patched and the original saf0316f BIOS have full 128GB support
Biostar M5SIB v2.0 Ver. 1.06 M5SIB_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Biostar MB-8500TTD New TTD0616B (06/11/98) TTD_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Chaintech 5IFM0 02/24/1997 5IFM0_J1.ZIP This patched BIOS adds support for all K6 models, including the K6plus.
Due to limitations of the linear Vcore regulator on the 5IFM0, a CPU-upgrade-adapter is needed to run the K6 series.
Chaintech 5IFM1 10/08/1997 5IFMK6WA.ZIP This patched BIOS adds support for both the original K6-2/III as well as the K6plus.
Due to limitations of the linear Vcore regulator on the 5IFM1, a CPU-upgrade-adapter is needed to run the K6 series. Or you can modify the board as described (in German) on K6-2 in IFM1
Chaintech 5RSA0 12/11/1998 5RSA0_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Chaintech 5RSA2 10/13/1999 5RSA2_J1.ZIP Both this patched and the original 10/13/1999 BIOS have full 128GB(640GB) support.
Chaintech 5SIM 08/07/1998 5SIM_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Chaintech 5VGM1 10/23/1997 coming Request beta testers for this patched BIOS.
This patched BIOS adds support for both the original K6-2/III as well as the K6plus.
Due to limitations of the linear Vcore regulator on the 5VGM1, a CPU-upgrade-adapter is needed to run the K6 series.
Chaintech 5VLM New 12/03/1997 5VLM_J2.ZIP This patched BIOS adds support for both the original K6-2/III as well as the K6plus, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!.
Chicony Laptop
MP983
V1.43D
V1.46S
coming Request beta testers for these patched BIOSes
DataExpert MVP 7598 V 1.3 MVP7_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
DFI 586IPVG 08/13/97 IPVG_J4.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
DFI 586ITBD New 07/13/98 5ITBD_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
DFI 586ITOX 03/28/01 ITOXC_J1.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III and supports the Cyrix MII 4.0x multiplier. Both this patched and the original 03/28/01 BIOS have full 128GB(640GB) support.
EFA P5MVP3-AT Version 1.05 P5MVP3J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Elitegroup P5SD-A New Ver 1.4a 01/04/1999 coming Request beta testers for this patched BIOS.
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
Elitegroup P5SD-AS New Ver 1.0a 06/03/1998 P5SDASJ2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Elitegroup P5SD-B Ver 2.3c 09/09/1998 coming Request beta testers for this patched BIOS.
This BIOS is for the Rev 1.1 and 1.1a boards and it is unknown if it will work on the Rev 1.0 board.
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Elitegroup P5SD-B+ Ver 1.1k 03/11/1999 P5SDBPJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Elitegroup P5SS-Me Ver 2.1 04/30/1999 P5SSMEJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Elitegroup P5TX-Bpro Ver 2.2 07/28/1998 coming Request beta testers for this patched BIOS
Elitegroup P5VP-A+ Ver 2.2h 06/01/1999 VP22H_J2.ZIP This BIOS is for boards with a 2Mbit (256KB) flash chip.
Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Elitegroup P5VX-Be New Ver 1.5 11/04/1998 VXBE_J2.ZIP This BIOS is for Rev 2.0 and Rev 3.0 boards. It is unknown if it works a Rev 1.0 board.
Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Note that the lowest Vcore selection on this board is 2.5V, so a Voltage Regulator Adapter is needed to run the K6-2/-III/plus.
FIC VA-502 1.13AJ139 (01/26/1999) coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
Freetech P5F85
P5F87
REV: P5F85/87 PCI GREEN (11/24/1998) coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB(640GB).
Gainward 5S3A 5S3A-V1.2 (04/12/1999) coming Request beta testers for this patched BIOS
Apart from K6plus support, this "patch J.2" BIOS adds Write-Allocation support for all K6 CPUs and has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Gainward 5VPA 5VPA-V1.5 (05/03/1999) 5VPA15J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Gigabyte 586ATV Ver 1.28 ATV128J2.ZIP This patched BIOS adds support for both the original K6-2/III as well as the K6plus, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Due to limitations of the linear Vcore regulator on early revisions of the 586ATV, a CPU-upgrade-adapter may be needed to run the K6 series.
Gigabyte 586ATS Ver 1.32 coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Gigabyte 586S2 Rev. 2.2 (07/30/98) coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Gigabyte 586T2 New Rev. 2.2 (12/23/98) 586T2_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Gigabyte 5SG-100 REV. 2.0g 5SG_J1.ZIP Both this patched and the original 2.0g BIOS have full 128GB(640GB) support
Iwill P55XB2 Jul.21.1999 P55XB2J1.ZIP Both this patched and the original Jul.21.1999 BIOS have full 128GB(640GB) support
Iwill XA100 New 32210A (Jul.20.1999)
32210B (Jul.20.1999)
coming Request beta testers for these patched BIOSes
Both these patched and the original Jul.20.1999 BIOSes have full 128GB(640GB) support.
The 32210A BIOS is for XA100 Ver 1.10 or earlier boards, and the 32210B BIOS is for XA100 Ver 1.2 or later.
J-Bond PCI500C-Pa REV:2.50 5C-PA_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
This BIOS can also be used on the identical Vigor VG5C-Pa board.
Jetway J-542B
J-542BS
D06 10-25-2000 542BD06J.ZIP This patched BIOS adds Write-Allocation support for all K6 CPUs.
Both this patched and the original D06 BIOS have full 128GB(640GB) support.
Jetway J-542C
J-542CS
D06 10-25-2000 542CD06J.ZIP This patched BIOS adds Write-Allocation support for all K6 CPUs.
Both this patched and the original D06 BIOS have full 128GB(640GB) support.
Lucky Star 5VP3 #LE97-03 (04/21/1999) LE97_J2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 32GB harddisk limit and supports IDE drives upto 128GB!
Lucky Tech
(Shing Yunn Enterprises)
P5MVP4 VIA Apollo MVP4 REV : C
(05/18/1999)
MVP4C_J1.ZIP Both this patched and the original MVP4C BIOS have full 128GB(640GB) support.
MicroStar MS-5172 V1.2 032798 coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
M-Tech (MTI) R547
R548
R547_009 (06/16/1998)
R548_009 (06/16/1998)
R548_J3.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
As the BIOSes for the R547/R548 boards are identical, you can use this patched BIOS on both the R547 and R548 board.
PCChips M520 New Release 1.1A (12/07/98) M520_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2/-III, supports the Cyrix MII 4.0x multiplier, and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
CAUTION: The lowest Vcore selection on this Single-rail board is 3.3V (board limitation), so a Voltage Regulator Adapter is needed to run any Dual-voltage CPU like the K6-2/-III/plus.
PCChips M550 New 11/17/1997 S M550_J2.ZIP This patched BIOS adds support for both the original K6-2/III as well as the K6plus.
Note that the lowest Vcore selection on this board is 2.5V, so a Voltage Regulator Adapter is needed to run the K6-2/-III/plus.
PCChips M570 v1.3 09/04/1998 S 570V13J1.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III.
PCChips M571 v3.2(a) 05/14/1999 S 990514J1.ZIP This board is the same as the Ampron PM-9100A and uses the same BIOS.
This patched BIOS adds K6plus support and has an updated VGA ROM (v1.13) as well.
PCChips M571 v7.0 04/21/1999 S 990421J1.ZIP This patched BIOS adds K6plus support and has an updated VGA ROM (v1.13) as well.
PCChips M572 02/24/1999 S 990224SJ.ZIP CAUTION: After installing the K6+ CPU, enter the BIOS Setup at the first boot and set the 'CPU Plug and Play' option to 'User Define', and 'Vcore Voltage' at 2.0V. Not doing so may damage the CPU!
PCChips M575 04/02/1999 S 990402A1.ZIP  
PCChips M577 03/06/1999 S 990309J3.ZIP New This board is the same as the Ampron PM9900 and uses the same BIOS. Apart from K6plus support, this patched BIOS has also better support for the original K6-2/550 and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
PCChips M590 06/25/1999S 990625J2.ZIP CAUTION: After installing the K6+ CPU, enter the BIOS Setup at the first boot and set the 'CPU Plug and Play' option to 'User Define', and 'Vcore Voltage' at 2.0V. Not doing so may damage the CPU!
This patch J.2 BIOS also fixes the USB ports problem of the 990625S(J) BIOS.
PCPartner/Vtech VIB823DS with LGS I/O chip BIOS-G (81209)
(08/13/1998)
P823G_J3.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
This BIOS cannot be used on the VIB823DS with ITE I/O chip
PCPartner/Vtech VIB878DS BIOS-I (90930)
BIOS-S (90930)
P878_J1.ZIP The ZIP contains 2 patched BIOSes. The -I BIOS is for boards with ITE I/O and the -S BIOS for boards with SMC I/O chip. Both these patched and the original 90930 BIOSes have full 128GB(640GB) support.
QDI Advance 3 P5MVP3/A3 V3.0SL Jul.12,2000 M1_B30J1.ZIP Both this patched and the original M1_B30A BIOS have full 128GB(640GB) support.
QDI Titanium IB+ V1.5SB Jan.07,2000 T1BP_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
QDI Titanium IIB V2.0 V2.3SL coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
QDI Titanium IIIB V1.2S coming Request beta testers for this patched BIOS
This patched BIOS adds support for all K6 models, including the K6plus. However, the lowest Vcore selection is 2.8V (board limitation), so a Voltage Regulator Adapter is needed to run the K6-2/-III/plus.
RedFox AGP-ALI (1Mb) VER:1.4 (09/06/1999) ALI_J1.ZIP This BIOS is for AGP-ALI boards with 1Mbit (128KB) flash chip. Both this patched and the original V1.4 BIOS have full 128GB(640GB) support.
Shuttle HOT-569 569WIQ0E (02/10/1999) 569J2Q0E.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Shuttle HOT-569A 569AWIQ7 (01/09/1999) 569A_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Shuttle HOT-571 571WIQ0B (02/10/1999) coming Request beta testers for this patched BIOS.
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Shuttle HOT-591P 591PWIQH (04/18/2000) 591PJIQH.ZIP Both this patched and the original 591PWIQH BIOS have full 128GB(640GB) support.
There is now also a newer 591PS024 BIOS from Shuttle. See above.
Shuttle HOT-603 603WW0C1 (06/17/1999) 603WW0J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Soyo SY-5XA5/5XAE5 5xae-1a7 (03/03/1999) coming Request beta testers for this patched BIOS.
This BIOS is for boards with 1Mbit (128KB) flashchip.
Apart from K6plus support, this patched BIOS has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
SuperMicro P5MMS98/P5MMS2 1.60 coming Request beta testers for this patched BIOS
Superpower SP-586TB SP-586TX VER:A.5
(09/14/1998)
586TB_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Tekram P5M3-A+ TRM-(P5M3-A+)-V1.04 P5M3A_J1.ZIP Both this patched and the original V1.04 BIOS have full 128GB(640GB) support.
Tekram P5M4-B TRM-P5M4-B-V1.03 P5M4B_J1.ZIP Both this patched and the original V1.03 BIOS have full 128GB(640GB) support.
Tekram P5M4-M TRM-P5M4-M-V1.03 P5M4M_J1.ZIP Both this patched and the original V1.03 BIOS have full 128GB(640GB) support.
Tekram P5M4-M+ TRM-P5M4-M+ V1.06 M4MP106J.ZIP Both this patched and the original V1.06 BIOS have full 128GB(640GB) support.
Tekram P5MVP-A4 (1Mb) TRM-P5MVP-V1.07 P5MVPAJ2.ZIP Apart from K6plus support, this "patch J.2" BIOS has a fix for the 64GB harddisk limit and supports IDE drives upto 128GB(640GB).
Tekram P5MVP-B4
P5MVP-A4 (2Mb)
TRM-P5MVP-V1.15 P5MVP_J3.ZIP Apart from K6plus support, this "patch J.3" BIOS has a fix for the 64GB harddisk limit and supports IDE drives upto 128GB(640GB).
Tekram P5T30-B4 TRM-P5T30B4-V1.12 coming Request beta testers for this patched BIOS.
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Tekram P5T30-B4E TRM-P5T30B4E-V1.03 P5TBE_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Tekram P5VP3-B3 TRM-P5VP3-B3-V1.03 P5VP3_J2.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
TMC AI5VG+ (1Mb)
AI5VG+ (2Mb)
-H4-0813
-U4-0630
AI5VG1J4.ZIP
M598U4_J.ZIP
The -H4- BIOS is for boards with 1Mbit (128KB) flash ROM, and the -U4- BIOS for boards that use the 2Mbit (256KB) chip.
Apart from K6plus support, the patched -H4- BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB). Both the patched and the original -U4- BIOS have full 128GB(640GB) support.
TMC TI5VG+ (1Mb)
TI5VG+ (2Mb)
-Z2-0622
-Z6-0525
TI5VG1J2.ZIP
TI5VGZ6J.ZIP
The -Z2- BIOS is for boards with 1Mbit (128KB) flash ROM, and the -Z6- BIOS for boards that use the 2Mbit (256KB) chip.
Apart from K6plus support, the patched -Z2- BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB! Both the patched and the original -Z6- BIOS have full 128GB(640GB) support.
Trigem Delhi-III Version 1.20 E120_J1.ZIP  
Tyan S1564 V1.02 5/13/98 HX669_J3.ZIP New Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB(640GB).
Tyan S1571
S1573
V1.06 082098 S1571_J3.ZIP Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB! For more info about upgrading this board, see Scott Holland's Tyan S1571 Upgrade Page
Tyan S1590 B1.16c 092399 V90J116C.ZIP Both this patched and the original 1.16c BIOS have full 128GB(640GB) support
Tyan S1592 REV : 1.1 coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!
Vision Top S7-MVP3 MVP3-HI VERSION:1.4 MVP3_J1.ZIP Both this patched and the original 1.4 BIOS have full 128GB(640GB) support
Zaapa ZP-5V New REV : 06 (12/02/1998) coming Request beta testers for this patched BIOS
Apart from K6plus support, this patched BIOS has also better support for the original K6-2CXT/III and has a fix for the 32GB IDE harddisk limit to support drives upto 128GB!

Note that, although these patched BIOS have been tested on different systems without any problems, they are provided "as is" and you use them at your own risk.


Any comments? Please send a message to J.Steunebrink@net.HCC.nl

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