Re: 3 (+3 more) retro battle stations
Posted on 2024-04-19, 15:56
Anonymous Coward wrote on 2024-04-15, 03:08: I’m surprised they worked at 40mhz No, they did not - only 33 MHz. See my posting above "Both work at 33 MHz, no one work at 40 MHz"
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-13, 12:31
Forgot to confirm your question about crystal oscillators. Ebay is littered by them. Brands dont matter. Search for “crystal oscillator”. Can include additional keywords like “dip14” or “full can”. Depends on how far you anticipate to go, consider buying a clock generator. They are more expensive, …
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-13, 08:00
DX variant has 132 pins. SX variant has 100 pins. The processors you show are SLC variants - pin incompatible with DX/DLC. That explains a lot for me, thank you. About the crystal oscillators for overklocking of a 386-CPU: I just found some info for one of your systems here https://www.vogons.org/ …
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-13, 08:00
deleted (double post)
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-13, 07:49
deleted (double post)
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-12, 17:50
Next update: both IBM-CPUs are 386! Tested with a FIC-386SC, Rev. A3. Both work at 33 MHz, no one work at 40 MHz. Identified by CheckCPU as "standard 386"; identified by Speedsys as 80386DX (not sure about the correctness of this, maybe they are DX, or maybe SX). In generally, they seems to be " …
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-12, 08:01
Never seen 386 cpus packaged like that. Are they functional ? As for your second question - all crystals work as advertised, except in one instance of extreme overclock. What are you after ? : ) The CPUs are still not tested, as I am affraid, they are maybe not 386 (with risk to damage my …
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-11, 16:16
one more question - which models/brands of crystal oscillators for overklocking of a 386-CPU over 40 MHz (maybe 45-50 MHz) are recommended? I took a look at page 1 of this thread and followed the links for some 386-systems, but could not find any info.
Re: 3 (+3 more) retro battle stations
Posted on 2024-04-11, 15:48
Are these two chips maybe 386-CPUs from IBM? Should I risk to open/take-down the aluminium covers of them without damage of the cores? Sadly I can not give any additional infos about them, as they are from "a friend of a friend of a friend"...
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-31, 12:25
feipoa wrote on 2024-03-05, 14:11: For my M919 v3.4BF Feipoa, just a short question about your M919: which BIOS are you using, and would you please upload it here. Thanks.
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-29, 17:12
A question to all: is it possible in generally to have really FAST L2-modules labeled as "15 ns" with better timings than 3-2-3 at FSB 60/66? Or are always 12 ns needed? I intend to test some other modules here (all of them 15 ns). The big problem I see is, that if even one module (of at least 5 …
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-29, 12:00
So your cpu is kind of special! You are right, CoffeeOne :-) I have another CPU booting at 200 MHz, too, but freezing the system after few seconds on the first POST-screen. There is a lot of luck - some CPUs can do 180 MHz at 4 V (at the same time, they refuse to start at 5 V), other can do 180 MHz …
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-29, 09:48
Can you confirm how stable the system is ? We see once again that L2 cache with high wait states can easily by as slow as direct DRAM access. Btw, you don't have to share all the CPU-Z and other synthetic test screenshots. Yes, I can confirm, that all my systems above are absolutely stable (100 %, …
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-27, 14:44
and the last pics
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-27, 14:43
next pics
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-27, 14:42
next pics
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-27, 14:40
And here is the last one of my 486-systems running rock-stable at FSB 60 MHz. Sadly, no jumper-options for 66 MHz are known (trying other undocumented jumper-settings as for 60 MHz there is no boot). The mainboard is a Kaimai KM-S4-1 (Rev. 1.1; SiS-496-chipset) and the CPU is an AMD 486-DX5-133 …
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-26, 19:00
Next tests done. For the Zida-board at FSB 50 MHz (CPU 200 MHz), the L2-cache was stable at timings of 2-2-2. GLQuake: 28,5 FPS Quake II: 12,0 FPS 3DMark 99 MAX: see picture At FSB 50, L2-timings 2-1-2, 3DMARK crashes to start (GLQuake: 29, 5 FPS / Quake II: 12,4 FPS). So, the best results are still …
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-26, 09:02
I was unable to make the Zida board do well at 60/66MHz FSB. Was thinking to give it another spin soon. you should check the Zida without L2 cache If not already tried, you should use only one piece of 16 or 32 MB FPM-RAM. My Zida-board has problems with 64 MB (regardless of one ot two module(s)) - …
Re: 3 (+3 more) retro battle stations
Posted on 2024-03-25, 18:04
I have to correct myself: the northbridge of my Zida-board is made in 1995, not 1997! I am sorry. In the meantime, it seems, that for the Zida-board I don't have better L2-modules here. The modules labeled with 10 ns (shown here the last days) seems to be really not 10 ns (maybe 15 ns) ones, as they …
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