Re: The World's Fastest 486

Posted on 2021-08-06, 00:53

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Would these 12ns sram chips work on socket 3 boards for 256k cache? https://www.ebay.com/itm/QTY-15-IS61LV256-12N-ISSI-28-PIN-DIP-32Kx8-LOW-VOLTAGE-SRAM-/123589906457?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0 Not sure what "low voltage" means but doesn't sound right. …

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Re: The World's Fastest 486

Posted on 2021-08-05, 23:46

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Would these 12ns sram chips work on socket 3 boards for 256k cache? https://www.ebay.com/itm/QTY-15-IS61LV256-12N-ISSI-28-PIN-DIP-32Kx8-LOW-VOLTAGE-SRAM-/123589906457?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0 Not sure what "low voltage" means but doesn't sound right. …

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Re: IDE support for more than 8 GB HDD storage on Biostar MB-8433UUD

Posted on 2021-08-05, 20:39

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now that I got it working on the Lo-tech ISA board, I'll see if I can get it working on the 3Com 3c515-TX. Curiously, the Lo-tech ISA board comes with a 128 Kbyte EEPROM chip, although I think 64K is the max supported. Why did they do that? With all the motherboard BIOS upgrades I've been doing, …

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Re: Biostar MB-8433UUD-A Flaky DVD-ROM Detection Problem

Posted on 2021-08-03, 01:28

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't have any unused HDDs that are within the size limitations of this board, I think; so no, I did not try with a real HDD. Actually, I do have a 534MB Seagate Medalist I can try next week... Hmm.... I should try and find a <8GB HDD for this build, maybe. If the drive is bigger than 8.4GB, the …

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Re: MSI 4134 AL1 and AMD 5x86?

Posted on 2021-08-03, 01:19

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Part of the reason for the bios dump is because PCem appears to be able to emulate your chipset so we'd all be able to play with the BIOS without having matching hardware, including simulating different CPUIDs. There might be different dumping/flashing software that can dump your bios chip even …

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Re: Troubleshooting my Tseng Labs ET4000AX ISA video card

Posted on 2021-08-02, 20:55

by

by jakethompson1

in Marvin \ Video

in Marvin \ Video

Push down on the three large socketed chips to make sure they're firmly in there, a problem I've had before

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Re: MSI 4134 AL1 and AMD 5x86?

Posted on 2021-08-02, 19:19

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Something went wrong in the dumping process I believe

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Re: MSI 4134 AL1 and AMD 5x86?

Posted on 2021-08-02, 17:30

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That BIOS dump appears corrupt

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Re: MSI 4134 AL1 and AMD 5x86?

Posted on 2021-08-02, 14:28

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can you upload an image of your BIOS, and do you have a POST code card (and if so what does it say when you try the Am5x86)?

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Re: What's the fastest CPU I can have for this socket?

Posted on 2021-08-02, 14:21

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, in theory a Pentium OverDrive will fit. It's arguable whether that or a Cyrix 5x86 or an AMD Am5x86 is actually fastest dependent on whether you get into overclocking or are running something specifically coded for the Pentium, and when you take cost into account. However, given the early 1993 …

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Re: Good modern cooler with 775 support ?

Posted on 2021-08-01, 23:23

by

by jakethompson1

in Milliways

in Milliways

Looks like Noctua sells some coolers that still support the LGA 775 with an extra mounting kit.

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Re: Two VGA cards in Vintage PC? (AGP + PCI?)

Posted on 2021-08-01, 22:46

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Mono plus colour card in old systems worked because their BIOS occupied different addresses. All VGA cards occupy same BIOS address space. So only one can be primary, they can't work together at low level the same way. Specific drivers for OS could allow it, but that would require one driver …

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Re: What mouse connection is this?

Posted on 2021-08-01, 22:22

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Anyone know whether bus mice were cheaper than serial mice? That's the main reason I can see for them...

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Re: a few questions on finding 386 boards

Posted on 2021-08-01, 16:41

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ok guyz, isn't that just the difference between write through and write back? i would rather stick to WT because while WB is a few percents faster, i want larger cacheable range as i am stuffing 32mb into it to run win95 and quake2. I like to call them "read-only" and "read-write" caching. You can …

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Re: visual c++ 5.0

Posted on 2021-07-31, 19:21

by

by jakethompson1

in Milliways

in Milliways

Just curious.... I have an old copy of visual C++ 5.0. I never really spent any time with it. Is there any point in doing so now? Being that this came from the 95/98 era, I am dubious that any programs developed with it would even run on a modern comuter But I could be wrong.... If you're …

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Re: a few questions on finding 386 boards

Posted on 2021-07-31, 18:38

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Isn't 7+1 the scheme where one bit is borrowed from the tag RAM to create a dirty bit? I would imagine it should still be possible to have an extra chip to provide the dirty bit. Yeah, we've talked about the one board I have (EFA 4DMU-HL3S) that has the UM491, but does not have a socket for a dirty …

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Re: What board is this, and how good it is? (Socket 3)

Posted on 2021-07-31, 04:39

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looks like this one? http://www.win3x.org/uh19/motherboard/show/6235

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Re: Why were older EGA/VGA cards 8BIT ISA?

Posted on 2021-07-31, 02:47

by

by jakethompson1

in Milliways

in Milliways

Code would have to make 16-bit accesses to video RAM to actually take advantage of a 16-bit video card, right? Is it possible this was rare in the early days of VGA? Maybe something to do with planar memory? Maybe. The original IBM "VGA card" (the IBM PS/2 Display Adapter) was apparently 8-Bit, too …

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Re: a few questions on finding 386 boards

Posted on 2021-07-31, 01:46

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The fastest is probably one of those 386/486 combo boards like we were talking about the other day: https://www.vogons.org/viewtopic.php?f=46&t=82599 The UM481 and UM491 don't support 7+1 tag ram (as I found from one of my 486 boards) so if you get a board that uses those and no dirty RAM it's …

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Re: Why were older EGA/VGA cards 8BIT ISA?

Posted on 2021-07-31, 01:21

by

by jakethompson1

in Milliways

in Milliways

Code would have to make 16-bit accesses to video RAM to actually take advantage of a 16-bit video card, right? Is it possible this was rare in the early days of VGA? Maybe something to do with planar memory?

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