Now the question becomes, did the k6-3 non plus have the same jumper? And does that make a cpu that we are aware of?
You and cpuz should add the id to your programs with a note that alerts the user to the thread maybe
Chkcpu wrote on 2023-02-16, 20:23:And now a K6-2 Model 12 (C), CPUID 05C8, 180nm, 2.0V was created!
Most interesting, can you post a CPUZ save file from one please? I wonder what CPUID 80000002/3/4 will report.
red-ray wrote on 2023-02-18, 11:45:Chkcpu wrote on 2023-02-16, 20:23:And now a K6-2 Model 12 (C), CPUID 05C8, 180nm, 2.0V was created!
Most interesting, can you post a CPUZ save file from one please? I wonder what CPUID 80000002/3/4 will report.
Hi red-ray,
Fritz did this K6-2+ L2 cache disable mod and showed a picture of your SIV program and CPU-Z at Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod
It seems that CPUID levels 80000002/3/4 report a regular "AMD K6-2(tm) Processor" with this mod.
Almost looks like AMD planned a mobile 180nm K6-2 model 12 at the time, but never released it. 😉
Jan
Just found another K6-2+/570 L2 cache mod video at https://www.youtube.com/watch?v=MFKW55fzDNk
At time index 7:40 you can see a 05CC CPUID when the L2 is disabled!
Curious, Jan
Chkcpu wrote on 2023-02-16, 20:23:K6-III Model 9, CPUID 0590, 250nm, 2.4V (has the x2 -> x6 multiplier remap)
I just noted SIV thinks it's 2.2V rather than 2.4V and https://en.wikipedia.org/wiki/List_of_A ... I,_250_nm) also says 2.2V, which do you think is correct?
My CPU has a CPUID of 0591.
Thank you for the link, I have asked Fritzchens Fritz for SIV save files and will adjust SIV once I get them.
red-ray wrote on 2023-02-18, 17:41:Chkcpu wrote on 2023-02-16, 20:23:K6-III Model 9, CPUID 0590, 250nm, 2.4V (has the x2 -> x6 multiplier remap)
I just noted SIV thinks it's 2.2V rather than 2.4V and https://en.wikipedia.org/wiki/List_of_A ... I,_250_nm) also says 2.2V, which do you think is correct?
Most regular K6-III CPUs were 2.4V (K6-III 400/AHX & K6-III 450/AHX) but some were 2.2V parts (K6-III 400/AFR & K6-III/AFX), but those where less common. The K6-III 333/AFR was always a 2.2V CPU I believe.
https://www.vogons.org/download/file.php?id=157905 […]
My CPU has a CPUID of 0591.
Thank you for the link, I have asked Fritzchens Fritz for SIV save files and will adjust SIV once I get them.
Okay, CPUID 0591; I was not aware of this K6-III stepping. Thanks.
Jan
Chkcpu wrote on 2023-02-18, 17:08:Just found another K6-2+/570 L2 cache mod video at https://www.youtube.com/watch?v=MFKW55fzDNk
At time index 7:40 you can see a 05CC CPUID when the L2 is disabled!Curious, Jan
Oh, I think I see what’s going on here.
In Fritzchens Fritz example, the 128KB -> 256KB L2 cache mod was already done when he did the other mod to disable the L2 cache. The CPUID then changed from 05D0 to 05C8.
In the YouTube video, Bits und Bolts had the L2 cache size jumper still at 128KB when he disabled the L2 cache. The CPUID then changed from 05D4 to 05CC.
The same change of minus 8! Probably a fixed CPUID offset in the microcode for this L2 disable function. 😀
Cheers, Jan
Chkcpu wrote on 2023-02-11, 15:13:Hi Kordanor, […]
Hi Kordanor,
I made the CHKCPU utility to have an independent check on the CPU speed, and the FSB and multiplier settings, so CHKCPU is only using data directly from the CPU and doesn’t use any BIOS data.
Yes, you definitely have a regular K6-2, but with the improved Chomper eXTended core. That is why CHKCPU indicates it as a K6-2CXT. This K6-2 model has the x2 multiplier remapped to x6, so the lowest available multiplier is x2.5.
From your CHKCPU report I see you are running the CPU in Virtual mode, probably because you load EMM386.EXE in CONFIG.SYS.
When you run the CPU in Real mode, CHKCPU will show you the multiplier and FSB speed, so you have a direct check on the BIOS settings.
Just remove the EMM386 line from CONFIG.SYS (or put REM at the beginning of the EMM386 line to make it a Remark line, so DOS ignores the command behind it) to get Real mode.Thanks for sending the whole CHKCPU report, but for your purpose the Chkcpu /v command only should tell you what you want to know.
In Real mode it should look like this:CPU Identification utility v1.27.1 (c) 1997-2022 Jan Steunebrink
------------------------------------------------------------------------------
CPU Vendor and Model: AMD K6-2 CXT 300/333/350/366/380/400/450/475/500/533/550
Internal CPU speed : 350.7 MHz (using internal Time Stamp Counter)
Clock Multiplier : 3.5
Bus clock speed : 100.2 MHz
CPU-ID Vendor string: AuthenticAMD
CPU-ID Name string : AMD-K6(tm) 3D Processor
CPU-ID Signature : 00058C
CPU Features : Floating-Point Unit on chip : Yes
Virtual Mode Extensions : Yes
Time Stamp Counter : Yes
Cool'n'Quiet support : Yes
Instr set extensions: MMX, 3DNow!
Current CPU mode : Real
Internal (L1) cache : Enabled in Write-Back mode
Size of L1 cache : 64 KB
Jan
Didnt have an option to do it before today. Used it again as you mentioned and the result was exactly what you posted. Thanks again!
Chkcpu wrote on 2023-02-18, 18:57:Oh, I think I see what’s going on here. In Fritzchens Fritz example, the 128KB -> 256KB L2 cache mod was already done when he di […]
Chkcpu wrote on 2023-02-18, 17:08:Just found another K6-2+/570 L2 cache mod video at https://www.youtube.com/watch?v=MFKW55fzDNk
At time index 7:40 you can see a 05CC CPUID when the L2 is disabled!Curious, Jan
Oh, I think I see what’s going on here.
In Fritzchens Fritz example, the 128KB -> 256KB L2 cache mod was already done when he did the other mod to disable the L2 cache. The CPUID then changed from 05D0 to 05C8.In the YouTube video, Bits und Bolts had the L2 cache size jumper still at 128KB when he disabled the L2 cache. The CPUID then changed from 05D4 to 05CC.
The same change of minus 8! Probably a fixed CPUID offset in the microcode for this L2 disable function. 😀
Cheers, Jan
Oh wow, so yet another as of yet unknown ID?
Adding all these to your next version? :p
Please add a onscreen disclaimer to report their cpu to the group so we can know one was found in the wild!
