Re: Looking for AMD-K5 PR200

Posted on 2017-11-16, 12:18

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello, I'm not sure if this is the right way to do this. If not, please let me know. Years ago I lost my rare CPU collection and now I'm looking to rebuild it. One of my favorites was a working AMD-K5 PR200. I've been looking for a while to acquire one. If anyone has any tips on where I might able …

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Re: Help with 486 motherboard

Posted on 2017-11-16, 12:15

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This chipset is fussy with RAM and chip density. Try different sticks. Check the IC part number to ensure it 5v FPM and not EDO or 3.3 v. 32 mb per stick is max. I dont think it needs a matched pair, but try anyway.

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Re: PS/2 to Microsoft Serialmouse Adapter Converter

Posted on 2017-11-16, 10:46

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Tim1075 wrote: konc wrote: For anyone interested in KVMs, it works perfectly well with a Level One KVM-0411 Perhaps we can make a sticky list of known working kvm switches? I am using an 8 port Compaq KVM switch but unfortunately there is too much lag 🙁 +1 Too much lag using my IOGEAR MiniView …

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Re: Maximum amount of memory on a 486

Posted on 2017-11-16, 10:44

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The first to attempt 512 MB on a 486 sounds like a novel enough cause to bring out the excavator!

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Re: Maximum amount of memory on a 486

Posted on 2017-11-16, 08:39

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The main issue is that in WT cache mode the cacheable area is 128 MB. (64 MB in write back mode) So most memory will run uncached. Yes, for a system with only 512 K of L2 cache. But for one with 1024K, WT will cache 256 MB. But for 256 MB, I could just use 4x64MB. The issue I have run into, though, …

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Re: PS/2 to Microsoft Serialmouse Adapter Converter

Posted on 2017-11-16, 07:59

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

konc wrote: For anyone interested in KVMs, it works perfectly well with a Level One KVM-0411 Thank you for providing this information. Did you try up to 1280x1024? Any lag? Unfortunately, I'm unable to find any of these for sale. Looks like they were marketed in Europe.

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Maximum amount of memory on a 486

Posted on 2017-11-15, 13:17

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As I recently discovered that the UMC UM8881 486 chipset works with double-sided 128 MB FPM memory sticks, it got me wondering - what's the maximum amount of memory which has been successfully installed (and functions) on a 486? I have personally only tested up to 256 MB, but after noting success …

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Re: Cyrix 386-to-486 upgrades use fast integer multipliers

Posted on 2017-11-13, 15:18

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also have difficulty comparing those two sources. It would be nice if the results came from the same source.

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Re: 30-pin SIMMs with 60 ns memory and 70 ns parity chips

Posted on 2017-11-08, 08:02

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I ran the test again, with less RAM (16 MB) and had the two sticks with 70 ns parity in the first slots. I ran IE3 and Netscape 2 for a bit, and no crashes. When using 70 ns RAM, the system crashes just after Windows 3.11 boot. For the 70 ns RAM, I need to add 1 ws in the BIOS, for 60 ns, I do not. …

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Re: Dual Socket 7 Board

Posted on 2017-11-08, 05:29

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any truth to what this guy says? May 2, 2006 #5 Mackintire 2[H]4U Joined: Jun 28, 2004 There was a motherboard produced that could SMP K6 processors @ 300mhz Infact the same company made a quad motherboard. However unless you have one of these beasties and the required drivers. Your completely out …

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Re: Dual Socket 7 Board

Posted on 2017-11-08, 02:44

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Has anyone tried dual K6 or dual Cyrix 6x86?

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Re: 30-pin SIMMs with 60 ns memory and 70 ns parity chips

Posted on 2017-11-08, 00:59

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Seems like a waste of more expensive chips. Has anyone tested this? I've done some simple tests in which I know a particular motherboard at 40 MHz FSB needs 60 ns chips because when I use 70 ns with 0WS, it will get general protection faults in Win 3.11. When I put 60 ns chips back in, even though 2 …

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Re: Dual Socket 7 Board

Posted on 2017-11-07, 08:19

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Gorgeous board! Appreciate the high-res photo.

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30-pin SIMMs with 60 ns memory and 70 ns parity chips

Posted on 2017-11-06, 22:11

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have some 4MB, 3-chip, 30-pin SIMMs and was noticing that the two RAM chips are rated for 60 ns, while the parity chip is rated for 70 ns. So what is the speed rating for the module as a whole when parity is enabled - 60 ns or 70 ns? Would a system which calls for 60 ns memory and uses tight …

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Re: $50 ebay AT system purchase

Posted on 2017-11-06, 22:03

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What I would like to know is how you managed to get this for $50 shipped. Wouldn't shipping alone be $50? I know Americans get everything for about half the cost of everyone else, but this still has me mystified. Have US shipping rates dropped? Did the guy sell it for 1 cent? Does it have something …

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Re: A tale of 3 Blue Lightnings... tale 1

Posted on 2017-11-05, 12:00

by

by feipoa

in Marvin \ System Specs

in Marvin \ System Specs

386_junkie: Do you still have this motherboard/system? If so, would you be willing to run DOOM -timedemo demo3 (no sound, of course) at 75 and 100 MHz on your BL3? I'm troubleshooting some issues with my BL3 related to cache invalidation.

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Re: How do you recognize if Memory is FPM or EDO

Posted on 2017-11-04, 07:17

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You may still be able to order the older memory testers at http://www.memorytesters.com/products.htm Not sure if the 72-pin SIMM modules (no shown on the site anymore) are able to discriminate between FPM and EDO, or if they just count the RAM quantity and test the response time. Last I checked with …

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Re: Getting the AGP HD4650 to do hardware flash acceleration on Win Xp

Posted on 2017-11-01, 21:10

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sounds like the same problem I ran into. Will those newer APU's run on XP, which have integrated graphics, CPU, etc? Or do the drivers, be it official or unofficial, not exist?

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Re: Stealth64 DRAM T VLB Trio64 86c764-P vs. 86c764X

Posted on 2017-11-01, 05:34

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yea, I was actually hoping for some VESA support from the BIOS. Which Trio64 86c764-P based card to you have and would you be willing to share the BIOS image? Yes, I have an EPROM writer. I checked my inventory and it looks like I have cards with 86C764X only. Ok, thanks for looking. I'm sure one …

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Re: Stealth64 DRAM T VLB Trio64 86c764-P vs. 86c764X

Posted on 2017-10-31, 19:44

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yea, I was actually hoping for some VESA support from the BIOS. Which Trio64 86c764-P based card to you have and would you be willing to share the BIOS image? Yes, I have an EPROM writer.

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