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Re: A brief comparison of 386 FPUs

Posted on 2022-12-18, 15:19

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The "KN" is the older design with the grey top, right? Don't those have compatibility issues with Cyrix's own SLC/DLC CPUs? It is not about the color. I has to write KN on top. And yeah I think these are a bit older revisions. To my understanding... just a bit more incompatible with IEEE standards. …

Re: A brief comparison of 386 FPUs

Posted on 2022-12-17, 23:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got one of these correct one? Check again my last video. Assuming testing at the same clock, the fastest FPU is the Cyrix -KN. No question about that. This one is a bit rare though. Now benches are nice but in practice a 387 FPU are a bit pointless these days. Games that need one, just run to …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-09, 22:47

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Feipoa you are the creator of the thread, so you decision is accepted. I tried so much to help her with recommendations etc. It is funny how some follow what I recommencement and still attack after that. The personal attacks and insults never stop, including from you. I am sorry Sphere478 I just can …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-09, 21:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some people really never quit... I wonder if attacking someone like that is also in the rules of this forum too. 90MHz crushes once I enable clock doubling even with 4.1V Worse than Sphere478 one? weird The same people are also so assuming and gaslighting that can not even get the Numbers right.

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-09, 03:16

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah I did 80Mhz at 3.6V 90MHz crushes once I enable clock doubling even with 4.1V I suppose I will know more once I get the sockets and more CPUs. But this sounds in line with your observations. PS: Let me just say that I have zero need to directly advertise here, so I do not do it. I did not do it …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-09, 01:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Very nice :-) I see you soldered all of the vcc pins you could get to with capacitors. Yes this was by design. It is a good idea that you will do that also. What value did you use? 10u, a very classic thing that I have done also to my 386 / 486 M/Bs https://youtu.be/eUaoXPgnZvo?t=780 What does your …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-09, 00:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, in the end I could not wait for a socket... I soldered a G66 directly into the adapter. It worked on the first try 100% stable at 2 x 33.3 = 66.6 MHz with 3.3V. Cache enabled. Now in some benchmarks it is actuality slower than my 486DLC @ 55MHz! In general... Integer tests are faster and …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 17:23

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is exactly what I wanted to avoid, confrontation in some forum. You two are proving my point. I will not answer anymore to attacks. People are not interested reading other fighting. Lets keep the destitution in topic and to the technical stuff. What I will do next only depends on feipoa's will. …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 16:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My thinking was, that it is pointless to do multiple threads on the same topic 486SXL2 132p to 168p. OK, If the creator of the thread "feipoa" does not like to see my results, in the end I go do an other thread, and maybe delete all my comments here and also stop helping here, depends on his will in …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 15:27

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Honestly, yes. This interposer working as well as it does AND being this small, is a miracle. It’s like trying to wire up a bowl of spaghetti. Lol I really wish 8 layer was an option. I would spread these traces out a little farther and put more ground in. It would let me do better power planes …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 15:10

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My initial post was really just presenting pics of my work and saying that I will give updates later. All my stuff are commercial. This was not a sale speech as this is not even ready. Normally I only post only when something is ready, and I have a video on that. I just wanted to inform that I have …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 13:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

feipoa: As I said... I can give advice, but not with this attitude. I would always try to reply to polite request if possible. Saying... "We welcome the critique, not the ego", or again that I am here for marketing or putting "professional PCB designer" in quotes does not help. I have a day job too, …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 01:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@galanopu I recognize the good intention in your message, just the wording feels a bit nuanced. Better say it directly: Hi there, sharing an alternative approach ... Linked CAD and BOM files. I also offer pre-assembled items to save you the trouble. Here is the url. There are other threads in the …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-08, 00:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why all this toxicity? I think Sphere478 knows me and understands. I am super busy, but I always replied when I was asked by him something technical. This topic is just to hard to follow, let alone participate. It is more like a private chat, really. [/quote] no comments in the thread previously [/ …

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-07, 13:38

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Coming soon... This was the request of someone who donated to me. Results within the next few days. The rest in a video and then to the store.

Re: Custom made, 50ns, FPM, Simm 30, memory modules with parity.

Posted on 2022-09-14, 02:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you, I have no plans right now for <50ns modules with parity. I can make something like that, but it is always about availability of chips in a reasonable cost. Even my 1 MB 45ns modules (no parity) are now out of stock.

Re: The World's Fastest 486

Posted on 2022-08-14, 22:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Chadti99 wrote on 2022-08-14, 22:35: galanopu wrote on 2022-06-09, 20:40: Binning / Testing 14 Am5x86 CPUs. The 190% Overclock on Am486-DX2-66 and the Unreal 70MHz 486 Bus! Enjoy... https://youtu.be/dwYBq7K7h-Y Another great video! I just noticed your 110Mhz OC on a POD83, very cool! Thank you 😀

Re: Socket 5/7/SS7 (clock signal interposer) Tweaker (Research)

Posted on 2022-07-08, 22:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for liking my channel :) I see your point here. Slowing down and Pentium is something that I have in mind and it is possible. Now going for the clock divider approach is actually the had way to do this. I have something better and easier in mind that I want to try. Now aside from that... …

Re: Custom / Professionally made, PC/104 Sound Card, ESS ES1869 + Dream SAM2695.

Posted on 2022-06-16, 00:58

in Marvin \ Sound

in Marvin \ Sound

No, this is will be a commercial product. If you want an open source PC/104 soundcard, check here: Open Source PC104 Soundcard

Re: New clock gen for tyan s1564d

Posted on 2022-06-15, 14:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://youtu.be/odcH80wiiPs Oh here we go, Thank you for linking my Video. As it is also mentioned in it, my "any_clk" device is only useful for older systems (max 486 and also there it can be tricky, my board work totally fine though). This can not do socket 5 and later machines. The reason is …

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