Are you talking about the Cyrix Cx486SLC2 or the IBM SLC2 ?

You mentioned "cyrix -cd", implying it is a Cyrix processor, but the Cyrix Cx486SLC2-50MP is locked on 2x mode. Thus, you must be referring to the IBM SLC2 part? The IBM and Cyrix parts use different software to control clock doubling.

feipoa wrote on 2025-03-20, 14:11:

Are you talking about the Cyrix Cx486SLC2 or the IBM SLC2 ?

You mentioned "cyrix -cd", implying it is a Cyrix processor, but the Cyrix Cx486SLC2-50MP is locked on 2x mode. Thus, you must be referring to the IBM SLC2 part? The IBM and Cyrix parts use different software to control clock doubling.

I am specifically asking for the TI 486SXLC2 cpu , in my use case I have full bios/system support for L1/L2 caches but not clock doubling
to my knowledge anything made for Cyrix cpus will be compatible with the TI as well

keropi wrote on 2025-03-20, 13:13:

Hiya! […]
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Hiya!

I remember at some point in the past I came across a utility for the 486slc2 cpu that all it did was enabling the clock doubling feature, no cache setups, changes, enable/disable etc - just the clock doubling was affected.
Anyone remember what it was ?
I know this can be done with something like "cyrix.exe -cd" but I am looking for something more streamlined plus it bugs me I cannot remember what I was using.
Thanks in advance for any info/tips! 😀

Check here:
Re: Doom on the 386 and 486DLC

kixs wrote on 2025-03-22, 22:19:

Check here:
Re: Doom on the 386 and 486DLC

thanks for that , will also check it as it seems more specific to sxlc cpus

keropi wrote on 2025-03-23, 08:47:

kixs wrote on 2025-03-22, 22:19:

Check here:
Re: Doom on the 386 and 486DLC

thanks for that , will also check it as it seems more specific to sxlc cpus

It's the only util that I know of that changes the multi. It does work fine with the SXLC. Report how it goes with your CPU 😉

I am confused as to the goal. cyrix.exe and 486cache.exe can both change only the CPU's multiplier if commanded to do so.

According to the OP, we are looking for a DOS utility that only has the ability to change the clock multiplier on SXLC2 or SXL2 CPUs. I don't know what app this could be.

don't think there is anything confusing about it: had a utility once that only did the clock doubling enable and nothing more and I trying to find it again
it seems though that it is more obscure than what I initially thought...

Do you remember who released the software? Was it TI, or an OEM that was using the TI SXLC?

I only remember it had a guy's name in credits and all it could do was enable clock doubling. I found it online sometime in 2001-2004 and used it with a cyrix 486slc2 upgrade. That's about it though, I remember nothing more... 🙁

keropi wrote on 2025-03-23, 23:34:

I only remember it had a guy's name in credits and all it could do was enable clock doubling. I found it online sometime in 2001-2004 and used it with a cyrix 486slc2 upgrade. That's about it though, I remember nothing more... 🙁

I know you say it is solely for clock doubling, but it looks like this can be used for just clock doubling.

I believe it was made by Improve Technologies

cache486.exe is a utility designed to enable clock doubling (and potentially cache management) for 486-class CPUs, such as the Texas Instruments 486SXLC2 or Cyrix Cx486SLC/e, particularly as part of the "Make-It-486" upgrade kit. Based on available information, it was developed by Improve Technologies, a company known for producing upgrade solutions for older PCs like the IBM PS/2 Model 30 286. The exact individual author isn’t specified in historical records, as software from this era often credits the company rather than a person. It was likely released around 1993, though this is an estimate based on contextual evidence.

https://vetusware.com/download/Make-It-486%20 … abler/?id=13766

thanks Demo, it's what kixs also told about a few posts above
I really need to dig to some old hdds in case I find the utility I remember