Re: AGP to PCI adapters - any PCB designers here willing to make one?

Posted on 2022-05-31, 23:31

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by 0xCats

in Marvin \ Video

in Marvin \ Video

When you want to add PCI-e and AGP to something that only does PCI. Just small things one works on, as I do... Filename Screenshot_20220601_012856.jpeg File size 94.56 KiB Views 1969 views

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Re: Last modern PCI vga speed results

Posted on 2022-05-25, 11:41

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by 0xCats

in Marvin \ Video

in Marvin \ Video

Windows run D3D6 code (3dmark 2001 is largely directx6) natively as designed, with all it's problems and the largely CPU side TCL logic. Additionally to this under Windows 7,8+ D3D6 code runs via a legacy API translation layer which implements a lot of things in CPU side software. All GPU's since …

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-06, 07:54

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How's your schematic coming along?

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[removed]

Posted on 2022-04-05, 01:26

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[removed]

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 18:22

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The same will apply for your BRDY, & ADS# pins.

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 17:48

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

- wt/wb pull up and pull down switches I just saw you wrote this, but controlling this line is not safe to do with pull resistors. It operates in unison with the PWT and KEN# signals. See the documentation: Screenshot_20220402_194350.jpeg This is a chipset controlled signal. And from the AMD K6-2 …

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 16:28

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Created the Footprint + Symbol with all rule defintions 😁 Time to rock and roll Filename socket 5-7 symbol.png File size 273.56 KiB Views 3728 views

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 12:20

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere478 wrote on 2022-04-02, 11:57: would we need a comprehensive database of cpus and settings to make that work? (programmed into the controller) like, people would have to report data from their cpus and it would be added to the firmware? Yes, but it's not too difficult to put together.

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 11:53

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think the easiest way to flexibly control all of them would be with a modern microcontroller on the PCB that can detect the CPU type, voltage, multi, detect the pin state and load and set specific pin configurations all without needing to fiddle any dip switches. At least that is what I'm …

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 11:22

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

To add something more A dual PCB design with headers between them is almost entirely unworkable. Here is why: I ran a simulation of it and tried with just normal stacked sockets to find out how badly it affects system stability and reliability. How many sockets can I stack with the CPU still working …

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Re: Socket 5/7/SS7 VOLTAGE Interposer.

Posted on 2022-04-02, 11:02

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can't actually use these pin headers to create the sockets correctly The pin spacing and diameter is not correct. They are also too thick and break the internal socket clasps. But there is no need to use a janky pins of any sort at all. Max-Mill PGA interstitial sockets already exist. (they are …

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Re: Adding 3.3v to pci

Posted on 2022-03-21, 14:06

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://www.vogons.org/viewtopic.php?f=46&t=86969&p=1054366#p1054366 We may have a new voltage source soon Can someone with more understanding put together a guide on how to test and make sure the mod will work? I hear that some older mobos use 5v on these pins? Is that true? Edit: Catsay on …

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Re: Cyrix/ST/IBM Aiming for the stars!

Posted on 2022-03-12, 11:32

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Probably, still the higher v2.9 frequency is 250 mhz (little to none overclocking chance), while the v2.2 is 285 (or 300 for the almost impossible to find 433gp). That's the performance difference at 250mhz clock: Immagine.png The configuration was slightly different compared to the 200 mhz, but …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-12, 11:28

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Epoxy cpu lives! Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket) It doesn't have an integrated sensor, hence also no thermal protection. The thermistor is instead located on the motherboard inside the socket hole, and are as a result …

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Re: Cyrix/ST/IBM Aiming for the stars!

Posted on 2022-03-11, 21:13

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just adding this here The Cyrix M2 block diagrams, as well as the Cyrix M2 databooks,which can be a bit quirky to find. cache diagram 1.png block diagram 1.png Also the 433GP max ratings: Vcc3 = IO Voltage Vcc2 = Vcore (this is for a 2.2V chip) (The NSC node used is just godawful with clock scaling …

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Re: Tillamook SMP mod.

Posted on 2022-03-03, 11:40

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for bringing this up. I haven't looked at the exact operation of tillamook SMP logic yet, but I have a hunch as to what is going on. I'll be working on my Socket 5/7 adapter again soon so this is something I'll take a look at in detail. The multiplier controls is certainly something that can …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-02-21, 17:28

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm curious to see if those cpus are really stable when the cache is enabled, if so this is a game changing discovery! Prime 95 Blend or large fft test (good for cache) for ~8 hours and 3DMark 2000 in loop For testing in Windows plain Prime 95 with small FFT is fine for finding unstable L2 cache. …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-02-21, 13:48

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The actual chip allocations and configurations are generally determined by market demand, not ideal configurations. As such if there is a large demand for K6-2+ 500's but not much for K6-3+ 500's using the same die and at the same time a large population of K6-3+ dies are meeting full spec, but …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-02-21, 13:31

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just want to add this for anyone else seeking to decap their K6-2+ To soften up the silicone adhesive dunk the CPU in acetone upside down for a while, it completely softens it up and you can slice the lid off like it were attached with butter. Almost no force required.

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-02-21, 08:52

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by 0xCats

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So mine also unlocks to K6-3 But I now need to run it at 2.4V and just 66Mhz FSB 2x(6x) Multi to get it to run stable.

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