debs3759 wrote on 2022-03-04, 02:13:

Sphere478 wrote on 2022-03-04, 01:40:

anyone have a line on the cpu galaxy guy?

https://www.cpu-galaxy.at/Info/contact.htm

I've sent him messages before, no reply.

try messaging naked1300 on the CPU-World forums. He'll get an email to his hotmail account (which I can't give out, as I only see it as a moderator). He may no longer use the email on his website. He was last active on CPU-World last March.

debs3759 wrote on 2022-03-04, 02:21:

try messaging naked1300 on the CPU-World forums. He'll get an email to his hotmail account (which I can't give out, as I only see it as a moderator). He may no longer use the email on his website. He was last active on CPU-World last March.

sent 😀

thoughts on how to go about the multiplier question?

Sorry, no.

the cpu galaxy guy can also be found on facebook.
I've several times seen him post his videos there.
can't recall the name though
think it was peter something...

edit: do a search in the vintage pc enthusiast group on fb

I recently re did the mods to my tillamooks and in doing so, all the multipliers now appear to be accessible to me.

At 66fsb
I can go through the different jumper settings and attain these results
133mhz (2x)
166mhz (2.5x)
200mhz (3x)
233mhz (3.5x)
266mhz (4x)
Unfortunately no 4.5x is among them.. 🙁

And all three jumpers seem to be having an effect.

My best guess is that Intel locked the 4.5x setting on my chip. How they did that still remains a mystery. But it doesn’t seem proper pull ups and pull downs and trying all the different jumper configs are the answer.

For the time being I believe the 4.5x multiplier may still and possibly forever be out of reach for 266 and lower tillamook owners..

If anyone has a 300mhz model, I want to talk to you.

I just talked to someone who has a broken green pcb style 300 they are saying that the chip defaulted to 4.5x when it used to work. I’m not sure if that means the other multipliers didn’t work or not. Or if the multiplier this person was using just happened to be the right one, but their experience seems to verify that a 4.5x multiplier exists on the 300 and suggests tillamooks in general may have it internally, though as no way to unlock the multipliers on mmx p55c chips has yet been discovered, it is assumed that these may also be beyond our reach

Golden tigers didn’t use to be very expensive,

Would have to analyze the pinout and decap but I’m guessing the fixed multiplier makes sense in a laptop

rmay635703 wrote on 2022-04-13, 15:50:

Golden tigers didn’t use to be very expensive,

Would have to analyze the pinout and decap but I’m guessing the fixed multiplier makes sense in a laptop

Well my plastic 266 has all sorts of multis that I can set

Sphere478 wrote on 2022-04-13, 19:47:

rmay635703 wrote on 2022-04-13, 15:50:

Golden tigers didn’t use to be very expensive,

Would have to analyze the pinout and decap but I’m guessing the fixed multiplier makes sense in a laptop

Well my plastic 266 has all sorts of multis that I can set

I guess that’s the difference between a surface mount laptop chip and a traditional chip used in embedded/industrial applications.

rmay635703 wrote on 2022-04-13, 19:49:

Sphere478 wrote on 2022-04-13, 19:47:

rmay635703 wrote on 2022-04-13, 15:50:

Golden tigers didn’t use to be very expensive,

Would have to analyze the pinout and decap but I’m guessing the fixed multiplier makes sense in a laptop

Well my plastic 266 has all sorts of multis that I can set

I guess that’s the difference between a surface mount laptop chip and a traditional chip used in embedded/industrial applications.

I have a pcb style 233 but I dare not install it as pins are damaged. Would be interesting to confirm it.

https://forum.vcfed.org/index.php?threads/dua … llamooks.74956/

So as someone currently in the process of designing a dual socket motherboard and intimately familiar with the Pentium design I have been asked to add some details here.

When Intel went about designing the Tillamook processor they where not developing the next great Pentium CPU, it was developed in a matter of months as a stopgap Ultra Low Power mobile solution for embedded systems and bridging the cost gap to the complex and high power Pentium 2 Mobile processor board.

As such the Tillamook is a very low effort and I mean this in the truest sense die shrink of the Pentium MMX from .350 micron to .250 micron with many features and corners being cut to eliminate complexity and reduce power consumption.

This is where I reference the given documentation for the vanilla Pentium embedded "Intel Embedded Processor with voltage Reduction Technology" as Intel engineers themselves called it, showcasing these signals already removed.

Further information about specifically the processor can all be found at Section 3.1 within Intel Document 273203-001 titled "Embedded Pentium® Processor with Voltage Reduction Technology" as intel themselves called it.

And then for Tillamook, this being the "Low-Power Embedded Pentium® Processor with MMX Technology".
Reference Intel Document 273184-003 Section 3.1.
I have also gone about testing associated control registers for this signals on a Tillamook processor, and interaction with these results in hard lockups, resets or nothing at al..

The signals and their related control registers have all been removed completely.

Yeah, I’m known for beating a theory to death to wring out all hope, but Even I think there isn’t much hope here.

These registers you are talking about, that’s through software? So you’re saying it’s not only missing the pins connection but the functions are shut down in the core? I recall I believe finding some connection on a few pins. So not all are technically NC But it doesn’t matter as you say as others are totally open, And the result of whatever they did is obviously no smp, and there doesn’t appear to be much(anything) we can do about it.

I’m still trying to figure out what’s going on with the 4.5x multiplier though. Best I can figure, intel locked it out like they did the 3.5x on the (not all). pentium mmx 200 for example. Anyway, as far as I can tell there IS a 4.5x multiplier, it does exist.

But I don’t have a 300 to experiment with.

Another interesting note is the two 233 tillamooks I have have the 4x unlocked. Which is odd.

Yes they are totally non functional on the the processors I've tested.
They also don't output the correct expected signals on PBGNT, PBREQ, PHIT, PHITM and and the DPEN doesn't drive the D/P signals appropriately to indicate dual processor or active processor mode.
The pins are just floating or High/Low with not even noise coming out of them.

0xCats wrote on 2022-06-05, 13:53:

Yes they are totally non functional on the the processors I've tested.
They also don't output the correct expected signals on PBGNT, PBREQ, PHIT, PHITM and and the DPEN doesn't drive the D/P signals appropriately to indicate dual processor or active processor mode.
The pins are just floating or High/Low with not even noise coming out of them.

Great info. Thanks catsay.

Edited last post

Btw, yours is a film chip right? Mine are plastic like desktop mmx chips

Of note also is the issue that the Tillamook CPU's where largely first manufactured for the TCP320 thin film carrier package on which the private bus signals are absent.
These where then also packaged into the PGA carrier form.
As such the actual connection to the die for the private bus signals is not exposed at all.

I would have gone as far as modifying/micro-drilling a carrier package to get access, but it's just not on the table due to the package not having them wired out.