• December 16, 2024: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Soltek SL-56G5/56G1/56G2 REV Z4 BIOS to the K6plus BIOS list.
  - Added a patched BIOS for the Elitegroup P5SD-A, Elitegroup P5TX-LA, QDI Titanium IIIB, and Soyo SY-5XA/5XAE to the patched BIOS list.
  - Added a note to the patched BIOS for the Vision Top S7-MVP3 motherboard. This BIOS is for the revision -G and -H boards.

• September 24, 2024: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the QDI Titanium IB, QDI Titanium IIB v2.0, and Superpower A586B to the patched BIOS list.
  - Updated the patched BIOS for the DFI 586ITBD, and Tekram P5T30-B4 on the patched BIOS list.
  - Added 1 motherboard to the list for which a patched BIOS is on the way. This is the Lucky Star 5MVP3 Rev:2.x.

• April 18, 2024: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the Asus P55TVP4, Asus TX97-XV, Elitegroup P5TX-Bpro, Iwill XA100, Shuttle HOT-571, Tekram P5T30-B4, and Tyan S1592 to the patched BIOS list.
  - Updated the patched BIOS for the Chaintech 5SIM, QDI Titanium IB+, PCChips M577/Ampron PM9900, Shuttle HOT-569, and Shuttle HOT-569A on the patched BIOS list.
  - Added 1 motherboard to the list for which a patched BIOS is on the way. This is the Gigabyte GA-586ATX.

• December 21, 2023: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Azza PT-5VMX 07/04/2000 BIOS to the K6plus BIOS list.
  - Updated the patched BIOS for the Tyan S1564 on the patched BIOS list.
  - Added 2 motherboards to the list for which a patched BIOS is on the way. These are the DTK PAM-0070S E0 and the PCPartner MB520NH/VXB810DS/VXB820DS/VXB830DS.

• May 15, 2023: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the Asus P/I-P55TP4XE(G), Azza PT-5VML, FIC VA-502, and Soyo SY-5TE0/5TE2/5TE5 to the patched BIOS list.
  - Added 1 motherboard to the list for which a patched BIOS is on the way. This is the Gigabyte GA-586ATE/P.

• Februari 2, 2023: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.27.1.
  - This is a maintenance release to fix a bug that could hang the PC with an EMM386 error when running CHKCPU in Virtual mode on a 386 or 486 CPU without CPUID support.

• December 19, 2022: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.27 and CHKCPU32 (Win32 version) is updated to version 2.15.
  This update marks the 25th anniversary of CHKCPU!
  The main focus of this update is to add and improve support for older CPUs, to better serve the retro computing community.
  - Added support for 8086/8088, V20/V30, 80186/80188, and 80286 CPUs. (CHKCPU only)
  - Added detection of an additional 8087, 80287, or 80387 FPU. (CHKCPU only)
  - Rewritten the CPU detection algorithm to allow for a more detailed detection of a wide variety of 386 and 486 CPU models without CPUID support. (CHKCPU only)
  - Improved the detection of early Cyrix/TI 486 CPUs without DIR support, like the Cx486S A-step, Cx486SLC/DLC, and TI486SXLC(2)/SXL(2) models. (CHKCPU only)
  - Added support for IBM 386SLC and 486SLC(2)/DLC2/BL2/BL3 CPUs. (CHKCPU only)
  - Improved L1 cache size detection on 386/486/5x86 CPUs. (CHKCPU only)
  - Fixed recognition of the Pentium 120/133 overdrive processor for P5 socket.
  - Fixed the DMP Vortex86DX/MX detection. (CHKCPU only)
  - Added IDT Winchip 2A fractional multiplier support. (CHKCPU only)
  - Fixed the IDT Winchip 2B detection.
  - Fixed the too high CPU speed reading on the AMD K5 and Rise mP6 CPUs, when the TSC is not used (instruction timing method). (CHKCPU only)
  - Added multiplier support for AMD family 16h, and 17h models. (CHKCPU only)
  - Updated the CPU data for new AMD models (Renoir, Matisse, Rome, Castle Peak, Picasso, Raven Ridge, Colfax, Pinnacle Ridge, Napels, and Whitehaven series), new DMP/SiS Vortex86 SoC models, and new Intel Xeon (Skylake -SP/-W/-X series), and Core-i/Pentium/Celeron models (Comet Lake-U, Whiskey Lake-U, and Kaby Lake Refresh series).

• August 20, 2022: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the Biostar MB-8500TTD, Chaintech 5VLM, DFI 586ITBD, ECS P5SD-AS and P5VX-Be, Gigabyte GA-586T2, PCChips M520 and M550 to the patched BIOS list.
  - Updated the patched BIOS for the Asus P55T2P4, TX97-X, and TXP4, PCChips M577, and Tyan S1564 with an improved 32GB bugfix that allows drives up to 640GB to be attached.
  - Added 5 motherboards to the list for which a patched BIOS is on the way. These are the Asus P55TP4XE(G), BCM FR550, ECS P5SD-A, Iwill XA100, and Zaapa ZP-5V.

• December 9, 2021: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Corrected several dead links in the K6plus BIOS list. Most BIOSes on this list can now be downloaded directly from this site.
  - Added a new BIOS for the Biostar M5ATC, and Shuttle HOT-569A to the patched BIOS list.
  - Added 3 motherboards to the list for which a patched BIOS is on the way. These are the FIC VA-502, Freetech P5F85/P5F87, and Soyo SY-5XA5/5XAE5.

• June 21, 2021: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Corrected a lot of dead links in the K6plus BIOS list. Most BIOSes on this list can now be downloaded directly from this site.
  - Added a new BIOS for the Abit TX5, Acorp 5TX29, Biostar M5SIB v2.0, DFI 586ITOX, J-Bond PCI500C-Pa, M-Tech (MTI) R547/R548, and QDI Advance 3 P5MVP3/A3 to the patched BIOS list.
  - Added 2 motherboards to the list for which a patched BIOS is on the way. These are the Gigabyte 586ATS, and PCChips M520.

• August 24, 2019: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Soltek 56H5/56H1 BIOS to the K6plus BIOS list, and corrected several broken links.
  - Added a new BIOS for the Azza PT-5IT, Tekram P5MVP-A4 (1Mb), TMC AI5VG+ (1Mb), Tyan S1564, and Superpower SP-586TB to the patched BIOS list.
  - Added 3 motherboards to the list for which a patched BIOS is on the way. These are the Abit IT5V v1.0, Chaintech 5VGM1, and QDI Advance 3 P5MVP3/A3.

• June 6, 2017: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.26 and CHKCPU32 (Win32 version) is updated to version 2.14.
  - Updated the CPU data for new AMD models (Summit Ridge, Stoney Ridge, Bristol Ridge, Carrizo, Godavari, and Beema series), and new Intel Xeon (Kaby Lake, and Broadwell-EX/-EP series), and Core-i/Pentium/Celeron models (Kaby Lake, and Broadwell-E series).
  - Added AES, AVX, AVX2, F16C, FMA3, FMA4, XOP, SHA instruction set extension support.
  - Expanded the Debug display with CPUID level 00000007h.

• Januari 1, 2016: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.25 and CHKCPU32 (Win32 version) is updated to version 2.13.
  - Updated the CPU data for new AMD models (Carrizo, Godavari, Kaveri, and Trinity/Richland series), and new Intel Xeon (Skylake, Broadwell, Haswell-EX/EP/EN series), and Core-i/Pentium/Celeron models (Skylake, Broadwell, and Haswell-E series).
  - Fixed a bug where Pentium Dual-Core desktop models were detected as mobile versions.
  - Added support for software changeable multipliers on the Cyrix 5x86. (CHKCPU only)
  - Corrected the L1 cache mode indication on the Cyrix MediaGX/GXm. (CHKCPU only)
  - Added multiplier support for the Cyrix MediaGX/GXm. (CHKCPU only)

• June 6, 2014: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.24 and CHKCPU32 (Win32 version) is updated to version 2.12.
  - Expanded the CPU count algorithm to allow detection of more than 64 logical processors under Windows 7 / Server 2008 R2 and later x64 Windows versions. Chkcpu32 can now detect up to 256 logical processors. (CHKCPU32 only)
  - Expanded the Debug display with an indication of the number of CPU groups. (CHKCPU32 only)
  - Updated the CPU data for new AMD models (Kabini and Richland series), and new Intel Xeon (Ivy Bridge-EX/EP/EN series), and Core-i/Pentium/Celeron models (Haswell and Crystel Well series).
  - Fixed the L1 and L2 cache count on AMD Family 16h (Kabini) models.
  - Added logic to distinguish an Intel Pentium III Xeon model 7 or model 8 from a Pentium III with the same CPUID signature.
  - Fixed the CPU Name string display for Intel Pentium III models 8 and A.
  - Fixed the mutiplier indication on Core 2 and later Intel models. (CHKCPU only)

• Februari 2, 2013: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.23 and CHKCPU32 (Win32 version) is updated to version 2.11.
  - Updated the CPU data for new AMD Opteron 4/8/12/16-Core 6300/4300/3300 series, FX 4/6/8-Core 4300/6300/8300 series, A8/A4 4000 series APU for Notebooks, C-series Dual-Core APU, and new Intel Xeon Quad/Six-Core, Core i7 Six-Core, Core i7 Quad Mobile, Core i7 Dual Mobile, Core i5 Dual Mobile, Core i3 Dual Mobile, Pentium Dual-Core, Pentium Dual-Core Mobile, Celeron Dual-Core, Celeron Dual-Core Mobile, and Atom Dual-Core models.
  - Fixed a logic error in the CPU count algorithm that could cause incorrect Core- and CPU count values on 4 CPU Xeon or Opteron systems with non-sequential APIC-IDs. (CHKCPU32 only)
  - Changed the CPU speed measurement to get a more reliable value on high speed systems and under Virtual environments. (CHKCPU32 only)
  - Fixed a (rare) case where the program was aborted during speed measurement on specific systems that returned invalid Time Stamp Counter values. (CHKCPU32 only)
  - Added a Registry mode to display the CPU speed value from the Registry instead of measuring the actual CPU speed. (CHKCPU32 only)

• September 15, 2012: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.22 and CHKCPU32 (Win32 version) is updated to version 2.10.
  - Made the program 64-bit Windows aware to make use of additional CPU Topology support of 64-bit Windows and to allow detection of more than 32 logical processors under 64-bit Windows. (CHKCPU32 only)
  - Rewritten the CPU count algorithm to get a reliable CPU topology enumeration also in cases where Hyper Threading or one or more CPU cores are disabled. (CHKCPU32 only)
  - Updated the CPU data for new AMD Opteron 4/8-Core 3200 series, A10/A8 5000 series Quad-Core APU, A6/A4 5000 series Dual-Core APU, A10/A8 4000 series Quad-Core Mobile APU, A6/A4 4000 series Dual-Core Mobile APU, E2/E1 1000 series Dual-Core APU, Phenom II X4, Athlon II X4/X3/X2, Phenom II X4/X3/X2 Mobile, Athlon II X2 Mobile, Turion II X2 Mobile, V-series Mobile, and Sempron (Mobile) models, and new Intel Xeon 4/6/8-Core E5-Family, Xeon 2/4-Core E3-V2 Family, Core i7 Quad/Six-Core, Core i7 Dual/Quad Mobile, Core i5 Quad, Core i5 Dual, Core i5 Dual Mobile, Core i3 Dual, Core i3 Dual Mobile, Pentium Dual-Core, and Atom Dual-Core models.
  - Fixed the L1 and L2 cache count on AMD Family 15h CPUs.
  - Fixed the L2 cache size display on VIA Samuel 2 and Ezra(-T) CPUs.
  - Added Windows 32-bit or 64-bit version information to the Debug display. (CHKCPU32 only)

• Februari 2, 2012: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.21 and CHKCPU32 (Win32 version) is updated to version 2.09.
  - Updated the CPU data for new AMD Opteron 4/8/12/16-Core 6200/4200 series, FX 4/6/8-Core series, Phenom II X6, Phenom II X2, Athlon II X4, A8/A6 Quad-Core APU series, A6 Triple-Core APU series, E2/A4 Dual-Core APU series, C/E-series Single- and Dual-Core APU, and new Intel Xeon 6/8/10-Core E7-Family, Core i7 Six-Core, Core i7 Quad, Core i7 Quad Mobile, Core i7 Dual Mobile, Core i5 Quad, Core i5 Dual, Core i5 Dual Mobile, Core i3 Dual, Core i3 Dual Mobile, Pentium Dual-Core, Pentium Dual-Core Mobile, Celeron Dual-Core, Celeron Dual-Core Mobile, Celeron Mobile, Atom Dual-Core, and Atom models.
  - Expanded the L1, L2, and L3 cache size detection on Intel CPUs to support new CPUID Level 4 cache data reporting on Sandy Bridge and later series.

• September 9, 2010: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.20 and CHKCPU32 (Win32 version) is updated to version 2.08.
  - Updated the CPU data for new AMD Opteron Quad/Six-Core 4100 series, Phenom II X6, Athlon II X4, Athlon II X3, Athlon II X2, Phenom II X4 Mobile, Phenom II X3 Mobile, Phenom II X2 Mobile, Turion II X2 Mobile, Turion II X2 Neo Mobile, Athlon II X2 Mobile, Athlon II Neo Mobile, and Athlon V Mobile models, and new Intel Xeon Octa-Core, Xeon Dual/Quad/Six-Core, Core i7 Six-Core, Core i7 Quad, Core i7 Quad Mobile, Core i7 Dual Mobile, Core i5 Quad, Core i5 Dual, Core i5 Dual Mobile, Core i3 Dual, Core i3 Dual Mobile, Pentium Dual-Core, Pentium Dual-Core Mobile, Celeron Dual-Core, Celeron Dual-Core Mobile, Atom Dual-Core, and Atom models.
  - Removed the display for SSE5 support, because AMD dropped this function.

• April 4, 2010: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.19 and CHKCPU32 (Win32 version) is updated to version 2.07.
  - Updated the CPU data for new AMD Opteron Eight/Twelve-Core 6100 series, Phenom II X4, Phenom II X3, Phenom II X2, Athlon II X4, Athlon II X2, Turion II X2 Mobile, Athlon II X2 Mobile, and Sempron Mobile models, and new Intel Xeon Dual/Quad/Six-Core, Core i7 Six-Core, Core i7 Quad, Core i7 Dual Mobile, Core i5 Quad, Core i5 Dual, Core i5 Dual Mobile, Core i3 Dual, Core i3 Dual Mobile, Core 2 Quad, Pentium Dual-Core, Pentium Dual-Core Mobile, Celeron Dual-Core, Celeron, Celeron Mobile, Atom Dual-Core, and Atom models, and new VIA Nano models.
  - Fixed the Core i7 Quad Mobile 720QM/820QM/920XM detection.
  - Changed the XML output to show the full CPU Model data including CPU stepping, via the "cpu_model" member. (CHKCPU32 only)

• October 14, 2009: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.18 and CHKCPU32 (Win32 version) is updated to version 2.06.
  - Updated the CPU data for new AMD Opteron Six-Core, Phenom II X4, Athlon II X4, Athlon II X3, Athlon II X2, Turion II X2 Ultra, Turion II X2, Turion X2 Ultra, Athlon II X2 Mobile, Turion Neo X2, Athlon Neo X2, and Sempron models, and new Intel Xeon Quad-Core, Core i7 Quad, Core i5 Quad, Core i7 Mobile, Pentium Dual-Core, Celeron Dual-Core, and Atom models.
  - Corrected the AMD Opteron Six-Core recognition and improved support for Opteron Dual-Core models.
  - Fixed the mobile AMD Athlon XP-M 2800+/3000+ (socket 754) detection.
  - Fixed a syntax bug in the XML output (3DNow! and 64-bit members). (CHKCPU32 only)
  - Added XML output of SSSE3, SSE4.1, SSE4.2, SSE4A (AMD), and SSE5 (AMD) instruction set extension support. (CHKCPU32 only)
  - Added XML output of the L1, L2, and L3 cache data. (CHKCPU32 only)

• July 9, 2009: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.17 and CHKCPU32 (Win32 version) is updated to version 2.05.
  - Updated the CPU data for new AMD Opteron Six-Core, Opteron Quad-Core, Phenom II X4/X3, Phenom II X2, Athlon II X2, and Sempron models, new Intel Xeon 5500 series, Core i7 Quad, Core 2 Duo, Pentium Dual-Core, Atom, and Celeron models, and new VIA Nano models.
  - Added logic to distinguish Dual-Core from Triple-Core from Quad-Core CPU models, which share the same CPU-ID signature.
  - Made the CPU speed determination more robust, to avoid hanging the speed measurement in a loop on a heavily loaded system. (CHKCPU32 only)
  - Expanded information on the number of CPUs in a system. Hardware topology of enabled logical processors in the system is now indicated on 3 levels:
  1) Number of physical CPU packages
  2) Number of Cores per CPU package
  3) Total number of logical processors =Threads. (CHKCPU32 only)
  - Added display of Enhanced Intel SpeedStep or AMD Cool'n'Quiet support.
  - Combined the CPU Features display of Instruction set extensions like MMX, 3DNow!, and SSE/SSE2/SSE3 into a single and separate display line.
  - Added indication of SSSE3, SSE4.1, SSE4.2, SSE4A (AMD), and SSE5 (AMD) instruction set extension support.
  - Added display of the number of L1 and L2 caches for multi-core CPUs.
  - Updated the L3 cache data for Intel CPUs.
  - Fixed a bug where a mobile AMD Athlon XP was detected as an AMD Sempron CPU.
  - Added an XML mode to allow easy parsing of specific CPU details. (CHKCPU32 only)
  - Expanded the Debug display to show all levels of CPUID Functions 4 and 11 (0Bh) for Intel CPUs.

• Februari 2, 2009: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.16 and CHKCPU32 (Win32 version) is updated to version 2.04.
  - Updated the CPU data for new AMD Opteron Quad-Core, Phenom II X4, Phenom X3/X4, Athlon X2, Turion X2 Ultra, and Sempron models, and new Intel Xeon Quad/Six-core, Core i7 Quad, Core 2 Quad , Core 2 Duo, Atom Dual-Core, Pentium Dual-Core, and Celeron models.
  - Improved L1/L2/L3 cache size detection on Intel CPUs.
  - Added support for the DMP Vortex86SX/DX/MX CPUs. (CHKCPU only)
  - Fixed a bug in the detection of several Athlon MP, Duron, and Sempron socket A models. Note: This bug did not affect CPU model detection in Short mode.

• July 7, 2008: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.15 and CHKCPU32 (Win32 version) is updated to version 2.03.
  - Expanded the CPU detection logic to include the Extended Model and Extended Family bits in the CPU-ID Signature. This change became necessary now most modern CPUs use these bits and to distinguish them from previous models with the same Base Family/Model signature.
  - Added an Extended Family digit to the CPU Signature display. Together with the Ext. Model digit and the 4-digit base Type/Family/Model/Stepping indication, this now makes the CPU Signature a 6-digit display.
  - Updated the CPU data for new AMD Opteron Single/Dual/Quad-core, Phenom X3/X4, Athlon 64 FX, Athlon 64 X2, Athlon 64 (Mobile), Turion 64 X2, Sempron (Mobile), and Intel Xeon Dual-Core, Xeon Quad-Core, Core 2 Duo (Mobile), Core 2 Quad, Pentium Dual-Core (Mobile), Celeron Dual-Core, Celeron M, Core 2 Solo, Core Duo, Core Solo, Atom, and VIA C7 models.
  - Fixed the AMD Sempron detection on Rev. F models.
  - Corrected the Hyper-Threading display on AMD Dual/Multi-core CPUs.
  - Added logic to distinguish AMD Opteron CPUs from Athlon 64 (FX) models with the same CPU-ID signature.
  - Added CPU core revision indication for all AMD K8 and K10 models.
  - Added a 'Virtualization Technology' display to the CPU Features list. Indicates if a CPU supports the Virtual Machine extensions.
  - Fixed the multiplier detection on AMD family 10h and 0Fh Rev. F (AM2) models. (CHKCPU only)

• July 2, 2008: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Corrected several broken links on the K6plus BIOS list.
  - Added a new BIOS for the DataExpert MVP 7598, GigaByte 586ATV, PCChips M570 v1.3, and TMC TI5VG+ (1Mb) to the patched BIOS list.

• August 8, 2007: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.14 and CHKCPU32 (Win32 version) is updated to version 2.02.
  - Fixed the Intel Celeron M 410/420/430 detection (Yonah core).
  - Fixed the Xeon Dual-Core 3040-3070 detection (Conroe core).
  - Updated the CPU data for new AMD Athlon 64 (X2), Athlon 64 FX, Sempron, Turion 64 X2, and Intel Xeon Dual-Core, Xeon Quad-Core, Core 2 Duo (Mobile), Core 2 Quad, Celeron M, Core Solo, and Core Duo models.
  - Added support for the Intel Celeron Processor 400 Sequence.
  - Added an Extended model digit to the CPU Signature display.
  - Added an 'Execute Disable protection' display which indicates if the CPU supports the Data Execution Prevention feature. Used by WinXP SP2 and Vista.
  - Added support for displaying the L3 cache size on AMD CPUs.
  - Added an /F switch to allow output of the CPU internal frequency only. This option can be used in scripts, to allow decision making based on speed.
  - Fixed the too high speed reading on the Intel Core and Celeron M 400 series CPUs when the TSC is not used (instruction timing method). (CHKCPU only)

• June 5, 2007: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Corrected several broken links on the K6plus BIOS list.
  - Added a new BIOS for the Jetway J-542B(S), PCChips M571 v3.2(a), and M571 v7.0 to the patched BIOS list.
  - Added 2 motherboards to the list for which a patched BIOS is on the way. These are the Gigabyte 586S2, and PCChips M550.

• Februari 4, 2007: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.13 and CHKCPU32 (Win32 version) is updated to version 2.01.
  - Updated the CPU data for new Intel Xeon Dual-Core, Core Duo, Pentium D, Pentium 4, Celeron D, Pentium M, and Celeron M models.
  - Added support for the Intel Core 2 Duo and Core 2 Quad.
  - Added logic to distinguish an Intel Xeon (Dual-Core) from a Core 2 Duo, Pentium D, or Pentium 4 model with the same CPUID signature.
  - Added a batch-file for easy use of the program.
  - Improved support for old UMC 486 CPUs and fixed the too high CPU speed indication on these CPUs (CHKCPU only).

• July 7, 2006: Updated the "CPU Identification utility" page.
  The CHKCPU utility (DOS version) is updated to version 1.12 and a new Win32 version (CHKCPU32 v2.00) is released as well.
  - Updated the CPU data for new AMD Athlon 64, Athlon 64 X2, Sempron, and Intel Pentium M, Celeron D, Pentium 4, Pentium D, Xeon, and VIA C3 models.
  - Added support for the Intel Core Solo/Duo and Transmeta Efficeon.
  - Enabled SSE3 display for any CPU that supports SSE2.
  - Corrected the Hyper-Threading display on Dual-Core CPUs.
  - Improved support for old Cyrix/TI CPUs like the TI486DX4 (CHKCPU only).
  - Expanded the Debug display with results from various CPU tests in case CPUID is not supported (CHKCPU only).
  - Improved the CPU speed display accuracy on modern high speed CPUs under Windows (CHKCPU32 only).
  - Added a 'Number of CPUs' display which indicates the nbr of logical cores (CHKCPU32 only).

• May 15, 2006: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Jetway J-542B(S) and MicroStar MS-5169 V4.0 BIOSes to the K6plus BIOS list, and corrected several broken links.
  - Added a new BIOS for the Chaintech 5RSA2 to the patched BIOS list.
  - Added 4 motherboards to the list for which a patched BIOS is on the way. These are the Biostar M5ATC, Jetway J-542B(S), PCChips M570 v1.3, and TMC TI5VG+ (1Mb).

• November 29, 2005: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the FIC PAG-2130, RedFox AGP-ALI (2Mb), and Soltek SL-54U5 BIOSes to the K6plus BIOS list, and corrected several broken links.
  - Added 3 new BIOSes to the patched BIOS list. These BIOSes are for the Elitegroup P5VP-A+, Iwill P55XB2, and PCPartner VIB878DS with SMC I/O chip.
  - Added 3 motherboards to the list for which a patched BIOS is on the way. These are the Acorp 5TX29, Asus TX97-XV, and DataExpert MVP 7598.
  - Updated the coming patched BIOSes for the Elitegroup P5SD-B and Superpower SP-586TB.

• July 7, 2005: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.11.
  - Updated the CPU data for new AMD Opteron, Athlon 64 (FX), Sempron, Turion, Intel Pentium M, Pentium 4, and Celeron D models.
  - Added support for the Dual-Core AMD Opteron, Athlon 64 X2, and Intel Pentium D CPUs.
  - Fixed a bug in the Hyper-Threading display.
  - Added Hyper-Threading and SSE3 display for the Athlon 64.
  - Added 64-bit support display for AMD Opteron, Athlon 64 (FX), Sempron, Turion, and Intel Celeron D, Pentium 4, and Pentium D CPUs.

• February 6, 2005: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the MicroStar MS-5191, Soyo 5SSM, and TCM TI5VGF BIOSes to the K6plus BIOS list, and corrected several broken links.
  - Added 6 new BIOSes to the patched BIOS list! These BIOSes are for the Asus SP98AGP-X with on-board sound, BCM IN5598, Biostar M5SAF, Elitegroup P5SS-Me, and Tekram P5T30-B4E and P5VP3-B3.
  - Updated the Tyan S1571/S1573 BIOS for IDE harddisk support upto 128GB.
  - Added 2 motherboards to the list for which a patched BIOS is on the way. These are the J-Bond PCI500C-Pa, and TCM AI5VG+ (1Mb).

• October 10, 2004: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.10.
  - Updated the CPU data for new AMD Opteron, Athlon 64 (FX), Athlon XP, Duron, Sempron, Intel Celeron, PentiumIII, Pentium M, Pentium 4, Celeron D, Xeon, and VIA C3 models.
  - Added Clock multiplier support for the AMD Opteron, Athlon 64 (FX), Intel Pentium M, Celeron M, and VIA C3 Nehemiah core.
  - Fixed the incorrect CPU features display on newer Pentium 4 models.
  - Added CPU features display for SSE2, SSE3, and Hyper-Threading.
  - Changed the Debug mode display to only show CPUID levels relevant for the detected CPU.

• September 6, 2004: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Amptron PM-599LMR and Biostar M5ALC BIOSes to the K6plus BIOS list, and corrected several broken links.
  - Added 3 new BIOSes to the patched BIOS list! These BIOSes are for the Asus VX97, Biostar M5ATD, and RedFox AGP-ALI.
  - Updated the PCPartner/Vtech VIB823DS BIOS for IDE harddisk support upto 128GB.
  - Added 12 motherboards to the list for which a patched BIOS is on the way. These are the Abit IT5H v2.0, Asus SP98AGP-X with on-board sound, Azza PT-5VML, Biostar M5SIB v2.0, Elitegroup P5SS-Me, PCChips M571 v3.2(a), PCChips M571 v7.0, QDI Titanium IIIB, Shuttle HOT-569A, Shuttle HOT-571, SuperMicro P5MMS98/P5MMS2, and Tyan S1592.

• March 10, 2004: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added 3 new BIOSes to the patched BIOS list! These BIOSes are for the Amptron PM-9100C, Asus SP98AGP-X, and Chaintech 5RSA0.
  - Updated the PCChips M590 BIOS to fix the USB ports problem of the 990625S(J) BIOS.
  - Added 3 motherboards to the list for which a patched BIOS is on the way. These are the Asus VX97, Biostar M5ATD, and Chaintech 5RSA2.

• December 22, 2003: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Biostar M5SAA BIOS to the K6plus BIOS list
  - Added 5 new BIOSes to the patched BIOS list! These BIOSes are for the Asus P/I-XP55T2P4, Asus P5S-B/P5-99B, Asus TXP4-X, DFI 586IPVG, and QDI Titanium IB+.
  - Updated the Gainward 5VPA BIOS for IDE harddisk support upto 128GB.
  - Added 3 motherboards to the list for which a patched BIOS is on the way. These are the Chaintech 5RSA0, RedFox AGP-ALI, and Tekram P5T30-B4.

• August 19, 2003: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Acorp 5ALI61 (1Mbit and 2Mbit) BIOSes to the K6plus BIOS list
  - Added 5 new BIOSes to the patched BIOS list! These BIOSes are for the Aopen AP5T, Asus SP98-N, Chaintech 5SIM, and Tekram P5M4-B and P5M4-M.
  - Added 2 motherboards to the list for which a patched BIOS is on the way. These are the QDI Titanium IB+ and IIB.

• July 16, 2003: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added 5 new BIOSes to the patched BIOS list! These BIOSes are for the Jetway J-542C/542CS, PCChips M575, Tekram P5M4-M+, Trigem Delhi-III, and Vision Top S7-MVP3.
  - Added 5 motherboards to the list for which a patched BIOS is on the way. These are the Abit AX5/PX5, Asus SP98AGP-X, Asus SP98-N, Chaintech 5SIM, and Gainward 5S3A.

• April 19, 2003: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added the Jetway 530BF BIOS to the K6plus BIOS list
  - Added 3 new BIOSes to the patched BIOS list! These BIOSes are for the Chaintech 5IFM0, Gigabyte 5SG-100, and Lucky Star 5VP3.
  - Added 4 motherboards to the list for which a patched BIOS is on the way. These are the Asus P/I-P55TVP4, DFI 586IPVG, Tekram P5MVP-A4 (1Mb), and Trigem Delhi-III.

• February 19, 2003: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added 3 new BIOSes to the K6plus BIOS list (Atrend, PCPartner/VTech, Soyo)
  - Added 2 new BIOSes to the patched BIOS list! These BIOSes are for the Asus P5S-VM/P5-99VM and Elitegroup P5SD-B+.
  - Updated 3 patched BIOSes for IDE harddisk support upto 128GB! These are for the AOpen AX5T, Asus TX97, and EFA P5MVP3-AT.
  - Added 5 motherboards to the list for which a patched BIOS is on the way. These are the Asus P5S-B/P5-99B, Chaintech 5IFM0, Chicony MP983 (laptop), Gigabyte 5SG-100, and Microstar MS-5172.

• January 2, 2003: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Corrected several broken links in the K6plus BIOS list (FIC, Epox)
  - Added 11 new BIOSes to the patched BIOS list! These BIOSes are for the Asus TX97-L, TX97-LE, and TX97-X, Lucky Tech P5MVP4, PCChips M572 and M590, PCPartner/Vtech VIB823DS-LGS and VIB878DS-ITE, Shuttle HOT-603, Tekram P5M3-A+, and TCM TI5VG+.
  - Updated 3 patched BIOSes for IDE harddisk support upto 128GB! These are for the Amptron PM9900/PCChips M577, Shuttle HOT-569, and Tekram P5MVP-A4(2Mb)/-B4.
  - Added 5 motherboards to the list for which a patched BIOS is on the way. These are the Asus TXP4-X, Lucky Star 5VP3, Superpower SP-586TB, Tekram P5M4-B, and Vision Top S7-MVP3.

• November 12, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Updated the K6plus BIOS list and made the PCChips M599LMR BIOS available for download from my site
  - Added a patched BIOS for the AOpen AP5T and AX5T.

• October 10, 2002: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.9.
  - Updated the CPU data for new AMD Athlon, Duron, Intel Celeron, PentiumIII, Pentium 4, Celeron 4, and VIA C3 models.
  - Fixed the incorrect multiplier indication on newer Pentium 4 and Athlon CPUs.
  - Added a CPU-ID Name string display. If the CPU supports it, this function displays the CPU Name or Brand string as stored in the CPU.

• September 10, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Updated the K6plus BIOS list and made the PCChips M585LMR, M598, and M598LMR BIOSes available for download from my site
  - Added a patched BIOS for the Asus SP97-XV and updated the Asus TX97-E patch. Both these (version J.2) BIOSes have full K6plus support, and have IDE harddisk support upto 128GB!

• July 7, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched K6+ BIOS for the Gainward 5VPA and updated the Asus TXP4 patch for IDE harddisk support upto 128GB!

• June 14, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the Asus SP97-V and updated the TX97-XE patch. These version J.2 BIOSes have full K6plus support, and have a fix for the 32GB IDE harddisk limit to support drives upto 128GB!

• May 13, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the Asus T2P4S. 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!

• May 6, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added a patched BIOS for the TCM AI5VG+
  - Updated the patched Asus T2P4 BIOS to version J.2. This new patch adds a fix for the 32GB IDE harddisk limit and supports now drives upto 128GB!

• April 11, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Updated the K6plus BIOS list
  - Added a patched BIOS for the Asus TX97-XE and the Chaintech 5IFM1.

• Februari 5, 2002: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Updated the K6plus BIOS list and added a beta BIOS for the Tyan S1598
  - Added a patched BIOS for the Asus TX97 and TXP4, and the Shuttle HOT-569.

• October 26, 2001: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Updated the K6plus BIOS list
  - Added a patched BIOS for the EFA P5MVP3-AT (Viking 3) and the Tekram P5MVP-A4(2Mb)/-B4.

• September 4, 2001: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added several new K6plus aware BIOSes to the list
  - Added a patched BIOS for the Asus P/I-P55T2P4 and the Tyan S1571/S1573.

• July 7, 2001: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.8.
  - Updated the CPU data for new AMD K6-III+, Athlon, Duron, Intel Celeron, PentiumIII, and VIA models.
  - Added support for the Pentium 4 and for Transmeta CPUs.
  - Added Clock multiplier support for the AMD Athlon, Duron, and VIA Cyrix III.
  - Fixed a bug that caused floppy or sound problems or crashed Windows on PCs which use a specific Intel I/O chip and a Celeron/PentiumII/III CPU. This bug affected the Compaq Armada laptop series and several Dell laptop and desktop models.

• July 5, 2001: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added several new K6plus aware BIOSes to the list
  - Added a patched BIOS for the PCChips M577 / Amptron PM9900.
  - Added a Tyan S1590 and the AMD K6-III+ article by Michael McCarrick. The findings presented here will work on most other boards as well.

• May 22, 2001: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  I finally found some time to update this page! :-)
  - Added a long list of K6plus aware BIOSes
  - Added a patched BIOS for the Asus TX97-E.

• January 19, 2001: Updated The Unofficial AMD K6-2+ / K6-III+ page.
  - Added information on CPU Core voltage and FSB frequency requirements.
  - Added a patched BIOS for the Shuttle HOT-591P.

• November 9, 2000: Added The Unofficial AMD K6-2+ / K6-III+ page.
  A page dedicated to K6-2+ / K6-III+ support for Super Socket 7 boards. This page is still under construction, but you can download a K6-2+/III+ enabled BIOS for the Tyan S1590 motherboard.

• August 8, 2000: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.7.
  - Updated the CPU data for new AMD K6-2+/III+, Athlon-E, Intel Celeron and PentiumIII-E models, and added support for the AMD Duron and VIA/Cyrix III.
  - Rewritten the Internal speed detection routine to improve the accuracy of the speed indication under Windows NT/2000.
  - Added a separate Clock multiplier display.
  - If the Clock multiplier value is know, CHKCPU will display the Bus clock speed as well.

• July 10, 2000: Updated the "The Windows 95 Partition Bug" page.
  The BIOS Int 13h extensions detection utility EXTBIOS is updated to version 1.3.
  - Added support for Command line switches. You can get a list with EXTBIOS /?
  - Made the program output clearer by indicating which subset is responsible for breaking the 8 GB barrier, and by moving the more intricate details to the Verbose ( /V) mode.

• July 3, 2000: Updated the "Move Windows 95/98 to a new harddisk" page.

• March 3, 2000: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.6.
  - Updated the CPU data for new AMD K6-2, AMD Athlon, and Intel Celeron models, and added support for the Intel PentiumIII-E (Coppermine).
  - Fixed the 45% too low speed reading on the AMD Athlon when the TSC is not used. (instruction timing method).
  - Increased the accuracy of the CPU speed measurement for fast CPUs, like the AMD K6-2/III, Athlon, and Intel Celeron/PentiumII/III(-E).
  - Rewritten the basic CPU detection algorithm for better detection of NexGen, Cyrix, and IDT CPUs. This algorithm works also in Virtual and Protected mode.
  - Added support for 386 and (non-Cyrix) 486 CPUs which do not know the CPUID instruction. CHKCPU will no longer abort with an error on these CPUs.
  - Fixed a bug that crashed CHKCPU in Real mode on a Nx586, and fixed the L1 cache mode detection on this CPU.

• Sept. 15, 1999: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.5.
  - Updated the CPU data for new AMD K6-2, Intel Celeron, PentiumIII, and IDT Winchip steppings, and added the AMD Athlon (K7).
  - Fixed a bug where an IDT CPU was displayed as an "IDT Rise -Unknown model-".
  - Added support for Command line switches. You can get a list with CHKCPU /?
  - An Intel Celeron CPU is now indicated as such. CHKCPU v1.5 is able to differentiate between a PentiumII and a Celeron with the same signature.
  - Added display of various CPU features. (Verbose mode only)
  - Added display of the L1 cache size. (Verbose mode only)

• July 9, 1999: Updated the "AMD 5x86 - 133 CPU Upgrade Info" page.
  - Added links to two additional Am5x86-133 upgrade kit vendors.
  - Added a multimeter procedure to locate the clock-multiplier jumper.
  - Added chipsets to the L1 cache WB support list.
  - Added info on how to test the CPU/Chipset L1 cache WB interface.

• June 9, 1999: Updated the "The BIOS IDE Harddisk Limitations" page.
  - The BIOS limitations article is updated. Added info about the 1994/95 Award BIOS 2 GB harddisk size display limit bug, and expanded the part about breaking the 8 GB barrier.
  - The BIOS Int 13h extensions detection utility is updated and is now at version 1.2.

• Apr. 6, 1999: Updated the "CPU Identification utility" page.
  The CHKCPU utility is updated to version 1.4.
  - Updated the CPU data (K6-III and PentiumIII) and added support for the Rise mP6 CPU.
  - Added display of the amount of integrated L2 cache on the PentiumPro/II/III, and AMD K6-III CPUs. For the Intel PentiumII an additional 'Celeron or Celeron-A type' indication is added when appropriate.
  - Rewritten the program so that it runs in (16-bit) Protected mode whenever a DOS Protected Mode Interface (DPMI) host is present. (Windows, OS/2, etc.) This improves the speed display accuracy in the DOS-box for all CPUs.
  - Added display of the Current CPU mode: Real, Virtual, or Protected.

• Feb. 27, 1999: Added Windows 98 information to the "Problems with BIOS Boot sector Virus Protection" and the "Move Windows 95/98 to a new harddisk" page.
  Updated the WD Table Check utility on the "The BIOS IDE Harddisk Limitations" page (CHKBIOS.EXE) to the latest version 2.30.
  Updated several broken links on other pages.
  

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