IBM PS/1 Processor Upgrade \ VOGONS

IBM PS/1 Processor Upgrade

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First post, by CunardPier54

Posted on 2023-07-08, 16:28

CunardPier54 Offline

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Joined: 2023-07-08, 15:23

I was able to upgrade my 1993 IBM PS/1 (2155 Professional) from the stock 33 MHz 486 DX to a 66MHz DX2. Would I be able to replace that with a Am5x86-P75 AMD (AM486DX5-133W16BHC) which to my understanding is a 486, without a hassle?

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Reply 1 of 1, by Sphere478

Posted on 2023-07-08, 23:57

Sphere478 Offline

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A pentium overdrive 83mhz is probably the easiest option.

Some of the faster cpus need 3.3v so a interposer would be required. I have a project for this, and so does calamity lime. They also used to sell them, might be able to find a old one online.

But here is the catch, a pentium overdrive 83 is kinda as fast as those other options in many respects even with the slower clock.

Sphere's PCB projects.
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