C0deHunter wrote on 2021-04-14, 18:55:

Hello all, Is there such a thing available? I would like to have the flexibility to swap my PIII-800MHz SLOT with *possibly* a S […]
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Hello all,
Is there such a thing available? I would like to have the flexibility to swap my PIII-800MHz SLOT with *possibly* a Socket7 CPU, that allows me to play some CPU Sensitive DOS games.

I believe there is an adapter for Celeron Socket 370, but I don't want that:
I need a Socket7 adapter, as I have plenty of loose original Pentium and MMX Socket7 waiting to be utilized.

My system specs are in my signature file.

Thanks!

There is a super rare Socket 8 adapter for Slot 1. You can run all the way down to a 166mhz Pentium Pro.

I know! I searched high and low, it is very rare, even 20 years ago!

I have a 256kb cache PPro at 150 stock speed, and I think the first PPro's released as engineering samples were only 133 Mhz. Anyway, the PII233 with its FSB and multiplier options will be a versatile cpu for your needs.

https://www.ebay.com/itm/HP-PII-233Mhz-512k-S … o1a8zY1&LH_FR=1

This must be a typo on their page, but why it says HP PII CPU?

C0deHunter wrote on 2021-04-16, 00:10:

https://www.ebay.com/itm/HP-PII-233Mhz-512k-S … o1a8zY1&LH_FR=1

This must be a typo on their page, but why it says HP PII CPU?

Because there is a sticker with an HP part number on the CPU.

Actually they are using the exact same picture on all of their products, so it’s very confusing:

https://www.ebay.com/itm/Intel-PII-233Mhz-512 … r-/332630922513

And

https://www.ebay.com/itm/InteL-PII-233Mhz-512 … r-/332630922568

C0deHunter wrote on 2021-04-15, 19:13:

I know! I searched high and low, it is very rare, even 20 years ago!

Here a couple of photos of other brands:
http://www.cpushack.com/wp-content/uploads/20 … ig-1024x734.jpg

They have these part numbers,

SL264

And

SL2HD

Whereas mine has 5064-2651

Do you know why?
Did I buy the wrong CPU?

C0deHunter wrote on 2021-04-16, 01:08:

They have these part numbers, SL264 And SL2HD Whereas mine has 5064-2651 Do you know why? Did I buy the wrong CPU? […]
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They have these part numbers,
SL264
And
SL2HD
Whereas mine has 5064-2651
Do you know why?
Did I buy the wrong CPU?

You are fine.
The 5-digit numbers starting with 'SL' are Intel spec numbers. They are printed on the side of the cartridge.

I could be remembering wrong, but isn't that PPro-->Slot 1 adapter designed for a specific motherboard?

PARKE wrote on 2021-04-16, 01:43:

You are fine. The 5-digit numbers starting with 'SL' are Intel spec numbers. They are printed on the side of the cartridge. naa […]
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C0deHunter wrote on 2021-04-16, 01:08:

They have these part numbers, SL264 And SL2HD Whereas mine has 5064-2651 Do you know why? Did I buy the wrong CPU? […]
Show full quote

They have these part numbers,
SL264
And
SL2HD
Whereas mine has 5064-2651
Do you know why?
Did I buy the wrong CPU?

You are fine.
The 5-digit numbers starting with 'SL' are Intel spec numbers. They are printed on the side of the cartridge.
naamloos.JPG

Thanks, I’m still not too happy with the HP designation on their website, I hope it’s not pulled from an HP desktop or something like that.
They claim they are new old stocks.

Anonymous Coward wrote on 2021-04-16, 01:46:

I could be remembering wrong, but isn't that PPro-->Slot 1 adapter designed for a specific motherboard?

Seems like they could work with specific chipsets, later chipsets needed the microcode update removed from the bios to post.

Too bad it’s so hard to get a PPRO working with an AGP chipset

What advantage does the Pentium pro offer over the pentium II with an unlocked multiplier? Just lower clock speed floor?

if you google for it there is a thread somewhere where a guy claimed that they got a k6 working on a socket 370 motherboard there is even a pic of a k6 installed on a slocket out there also. but I'm 99% sure that they are hoaxes. if you look at the pinouts they aren't similar.

apparently pentium in a 386 motherboard is a thing though.

Edit from the distant future: I can now say without any doubt that there is basically zero chance that someone got a k6 working in a 370 motherboard or vice versa. Not by plugging it into the socket anyway. I’ve been working with the pinouts of these sockets recently and you would only get smoke of you tried this. Some sort of fancy interposer with super complicated bus translation chips might be possible but. Short answer, no. It didn’t happen.

rmay635703 wrote on 2021-04-16, 02:36:

Anonymous Coward wrote on 2021-04-16, 01:46:

I could be remembering wrong, but isn't that PPro-->Slot 1 adapter designed for a specific motherboard?

Seems like they could work with specific chipsets, later chipsets needed the microcode update removed from the bios to post.

Too bad it’s so hard to get a PPRO working with an AGP chipset

With an adapter, the Ppro should work on some, if not all i440LX mainboards, providing they can handle the right voltage.

apparently pentium in a 386 motherboard is a thing though

That might work if you have a 386-->486 upgrade adapter like the Transcomputer, and a POD83. But, you'd probably have to do something about the extra ground and voltage lines that overhang the PGA168 socket. Didn't the guy on VCfed do this with the Inboard PC?

zyga64 wrote on 2021-04-15, 10:41:

Probably yes, but I only tested it at this speed, and that's all. No serial use, because for playing with early DOS I prefer my […]
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H3nrik V! wrote on 2021-04-15, 10:06:

zyga64 wrote on 2021-04-14, 19:19:

(...)
I have for example PII 400 SL2S7 which can be clocked 133Mhz (2x66 without L2) and 166Mhz(2.5x66MHz with L2) up to 5x100MHz stable.

That's nice, and being a Deschutes core, you must be able to almost run it on passive cooling at 133 MHz?

Probably yes, but I only tested it at this speed, and that's all. No serial use, because for playing with early DOS I prefer my 486DX33 machine.
In fact it has original BIG heatsink which I don't know how to remove 😀 It looks exactly like this one. link
I rather prefer smaller cooling solution from original Intel BOXed processor (those are quiet).
At its original frequency (400Mhz) passive heatink is definitely not sufficient. It's too hot in my opinion, so small fan is attached in addition.

Good thing is - the motherboard I use (rather uncommon Totem P2BX with Intel BX chipset) has jumper for 66/100MHz so FSB can be changed on the fly (tested by me)..

Wow, that's a cool (pun intended) looking heatsing 😉 But I agree, that at rated 400 MHz, active cooling will be required.

C0deHunter wrote on 2021-04-16, 01:59:

Thanks, I’m still not too happy with the HP designation on their website, I hope it’s not pulled from an HP desktop or something like that.
They claim they are new old stocks.

It just means that it's a (replacement) part for HP computers. HP and other brands give Intel parts an extra sticker/serial number so they can specify replacement parts/upgrade paths in their manuals and trying to tie you to the brand. It's a genuine Intel part so no worries.

And you chose well. I actually tried running the cacheless Celeron 266Mhz with speed sensitive games and it isn't slow enough. Some games on the Vogons Wiki seem to max out around the Pentium 233Mhz mark, but the Celeron is faster than that in those cases. Games like Jazz Jackrabbit still needed to be patched with the Celeron.