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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Re: Trident 8900D on 486DX2-66 system - VLB replacement?

Posted on 2021-07-31, 01:11

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the opinions folks - that’s my mind made up there, amazing how many conflicting opinions there are on it. The machine is running DOS 6.22 and Windows 3.1 but it’s mainly going to be a DOS machine tbh, the Windows install wasn’t really necessary. I’ve got my eye on a nice CL 5428 card for …

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Re: 386/486 boards? Motherboards with a socket for both a 386 and 486...

Posted on 2021-07-29, 02:43

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I has me one, a 486LC1, contaq chipset, I has me many other 486 boards to run 486es, I has me soldered down 386SX25s for 386es. I see AMD 386DX40s, I think them shiny. Not sure exactly when those boards were released, but I'd guess the Am386DX-40 is the whole reason they exist. Perhaps it was …

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Re: 486 eBay pickup - new project!

Posted on 2021-07-28, 23:07

by

by jakethompson1

in Marvin \ System Specs

in Marvin \ System Specs

With 64 MB RAM you have to switch your L2 cache to the slower write through mode when it is not larger than 256 KB. Isn't that more a question of TAG ram size? Kind of. There are only as many tags as cache lines. Because the 486 internal cache has lines of 16 bytes, it seems external caches usually …

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