Re: Buying/using NOS IDE hard drives

Posted on 2021-07-19, 04:06

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I've been accumulating hardware for several retro builds, period correct around the late 90s - early 00s, windows 98 and XP, and considering buying NOS IDE hard drives as I prefer legit hardware. I am aware of the CF adapter option, and I will also use those in some builds. I'm curious to hear …

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Re: Gigabyte GA-486VS missing caps

Posted on 2021-07-19, 00:09

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Out of curiosity is there any reason why someone would do this? Do you think they were practicing desoldering? Or wanted to re-cap the board but then quit before the new ones came in?

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Re: Change a game's name by one letter, to make it something completely different (just for fun!)

Posted on 2021-07-19, 00:03

by

by jakethompson1

in Milliways

in Milliways

Reminds me of this blog post: https://devblogs.microsoft.com/oldnewthing/20 … 305-00/?p=40373 Apparently one way to catch early DirectX drivers cheating on benchmarks was that they looked for the test program by executable name, so it could be caught by changing one letter.

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Re: Struggling to Setup PNP SB16

Posted on 2021-07-17, 04:34

by

by jakethompson1

in Marvin \ Sound

in Marvin \ Sound

I've gotten what I believe is everything in order, but I can't get the diagnose tests finished properly. When I use diagnose.exe it runs through every channel until the HIGH DMA, on which it hangs forever. I can't seem to go into CTCU and change the channel at all, am I missing something? Can you …

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Re: Need an AT switch in an ATX case because AT cases are to expensive

Posted on 2021-07-16, 01:50

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Once you are in the realm of using an ATX-to-AT converter on the power supply, another option is to replace the momentary power switch in an ATX case with a latching one. I've found the E-Switch TL2285EE to fit many cases. You would have to solder wires between the correct pins, and the wires on the …

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Re: IBM PS/1 processor upgrade.

Posted on 2021-07-16, 00:12

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Mine is the one labeled "235 of 304", with 236 being the image. Nothing there or in the "processor type" setting shows a bus speed toggle. On that note, I've come across this listing. Would this allow me to use an Am5x86-P75 chip, or would the bus speed prevent that? Intel486dx33 is like this …

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Re: 100Mbps PCI NIC that does *not* bus master

Posted on 2021-07-15, 23:31

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

maxtherabbit wrote on 2021-07-15, 20:26: Didn't seem to work, which is unsurprising since all the parameters in that key were laid out into subkeys and not just plain string values Is it the 3c59x or the 3c90x driver that you are using? Remember these are NDIS, so the same drivers are (usually) …

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Re: IBM PS/1 processor upgrade.

Posted on 2021-07-15, 01:04

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Intel DX4ODP75 comes with a built in voltage regulator and heatsink. If you're replacing the existing CPU, make sure you get the DX4ODP R version. The DX4ODP is meant for an overdrive socket. Are you sure? I see that someone posted a picture of the motherboard now, and I thought so too at first …

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Re: IBM PS/1 processor upgrade.

Posted on 2021-07-14, 23:13

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A DX4-75 would be the easiest and most compatible upgrade, I think. The Intel DX4ODP75 comes with a built in voltage regulator and heatsink. You'd have to weigh that against buying the three parts separately. You could get a DX4-100 upgrade and just run it underclocked too. As you mention, the …

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Re: IBM PS/1 processor upgrade.

Posted on 2021-07-14, 22:56

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

First question would be whether the board has multiple clock rates or is stuck at 25 MHz.

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Re: 286 with 1MB RAM - any way to get 640K Conventional?

Posted on 2021-07-14, 21:16

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Early 286 mainboards in fact did not support the 640+348 configuration, because that one is technically more difficult to handle than 512+512. So rmay634703 is correct that the only way to make use of all mainboard RAM and get 640K conventional is using a 16bit ISA memory expansion card. On 6MHz …

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Re: 3 (+3 more) retro battle stations

Posted on 2021-07-14, 06:05

by

by jakethompson1

in Marvin \ System Specs

in Marvin \ System Specs

So you put device=c:\um8673.sys into the config.sys, but what file do you edit to set the speed, e.g. Speed 16, 17, etc ? I assume those speeds are MByte/s values? Note that I have the MB-8433UU C -A which has the UM8886 A F rather than BF, but they seem similar. One difference is with this board, …

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Re: So embarrassing..what's the default bios password for this PC Chips Cheetah 486 board v1.7 motherboard?

Posted on 2021-07-12, 05:14

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am encountering this problem now with a PCCHIPS M918. I have absolutely no chance. CMOS resets, leaving it without a battery, etc. does not help. Entering the BIOS is not possible. All the passwords, that I tried, don't work. Even if I use a BIOS from another Board with the same chipset, it asks …

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Re: CacheCHK and Socket 3 Pentium Overdrive POD83

Posted on 2021-07-12, 03:42

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looks like 16K for code and 16K for data so your results make sense

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Re: AMI Color BIOS (1993 and earlier) modification in hex editor

Posted on 2021-07-12, 01:25

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice to see this information retained online now. It is probably too involved for most users of the forum, but that could change in time. Now you know what it's like for us reading your directions on upgrading the 8433UUD to 1024k cache, modifying the keyboard controller to add a mouse port, etc. " …

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Re: 486 - Brief sign of life upon power up

Posted on 2021-07-10, 05:51

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I tried powering it up again tonight with different RAM this time to the exact same result: The fan spins about one rotation upon power-on, then nothing, and then about one rotation upon power-off. I did notice a quiet electrical noise rising in frequency just before the fan spun, a build up of …

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Re: PCI slots fouling CPU heatsink

Posted on 2021-07-09, 19:47

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The HOT-591P also had this issue. My understanding was the official recommendation was a low-profile copper heatsink.

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Re: Where can I find "AMIBCP" (for DOS) ?

Posted on 2021-07-09, 02:10

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No that is not the original AMIBCP for Windows 1.0, was hoping to find it..... Again though, is there something specific you are trying to do with a 10/10/94 bios? Like the other thread I posted for non-WinBIOSes, it may be easier to analyze the bios and figure out how to do what you want, although …

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AMI Color BIOS (1993 and earlier) modification in hex editor

Posted on 2021-07-08, 01:40

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I saw the AMIBCP search thread was active again. In talking with some of the members about the PS/2 mouse hardware modifications on their boards, there are at least a few modifications you can do with these BIOSes even without having AMIBCP, found by digging around in the hex dump, DOS DEBUG, and in …

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Re: Where can I find "AMIBCP" (for DOS) ?

Posted on 2021-07-06, 16:36

by

by jakethompson1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The oldest Windows version I have is 2.42. The oldest DOS version I have is 5.11E. It would be nice to get a hold of every version between 1.0 and 5.0, but I'm feeling pretty pessimistic about this. The odds are about as good as finding a MR BIOS image for the VLSI topcat. I would like a copy of …

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