Re: What do you drive?

Posted on Yesterday, 23:45

by

by feipoa

in Milliways

in Milliways

That's way too clean! Nice Bilstein shocks. When I replaced my shocks with Bilstein, there was the option for standard replacement, or the "HD", heavy duty. I went with the HD, but wasn't sure if the ride would be as soft as the original. I felt maybe it wasn't as soft. Is this the general consensus …

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Re: What do you drive?

Posted on Yesterday, 22:33

by

by feipoa

in Milliways

in Milliways

Yeah, I would spray the inside of the rockers with undercoating before considering high density spray foam in there. I wasn't really recommending this as a practice, just thinking out loud. The rockers on my W123 are definitely not filled. Would it be better to use bed liner as the undercoating …

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Re: Register settings for various CPUs

Posted on Yesterday, 22:01

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you measure Vcc? Could you share a photo of your soldering job?

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Re: Searching for an old util that enabled 486slc2 clock doubling (nothing else)

Posted on Yesterday, 14:11

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Are you talking about the Cyrix Cx486SLC2 or the IBM SLC2 ? You mentioned "cyrix -cd", implying it is a Cyrix processor, but the Cyrix Cx486SLC2-50MP is locked on 2x mode. Thus, you must be referring to the IBM SLC2 part? The IBM and Cyrix parts use different software to control clock doubling.

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Re: What do you drive?

Posted on Yesterday, 10:26

by

by feipoa

in Milliways

in Milliways

Isn't there a type of high density spray foam , or other spray filler, which is water impenetrable? I haven't tested it, but seems like I've sprayed one variant of spray foam which created a glassy surface film.

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Re: What do you drive?

Posted on Yesterday, 08:55

by

by feipoa

in Milliways

in Milliways

I find myself suspicious of the undercoatings, I have had cars that have had it done, and lost the rockers (sill panel UK) in one because water went along underneath it, rusted underneath, that was the rubberized type, it actually held the water under it. Then on another car that had had the sticky …

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Re: What do you drive?

Posted on Yesterday, 00:20

by

by feipoa

in Milliways

in Milliways

I haven't bought a car since the 90's. I still drive my old cars. Am I helping the environment or hurting it? Running a 15+ year old one is supposed to be better than the invested energy required to make a new one. I wish I could have kept some of mine, but structural rust got them, and there were …

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Re: How to enable clock-doubling on Ti 486SXL2 CPUs

Posted on 2025-03-19, 22:15

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do a gentle poke test on the pins with a metal poker, e.g. a dental pick or toothpick. Also check for conductivity of each pin using the multimeter.

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Re: Register settings for various CPUs

Posted on 2025-03-19, 10:48

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I specifically recall encountering one motherboard for which I could not clock double the SXL2 beyond an FSB of 33 MHz. The command to clock double would be ignored by the SXL2 CPU. I'm not sure which checks the CPU has for this. Try measuring Vcc at the CPU to ensure it is 4.9 to 5.1 V. Also try to …

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Re: Register settings for various CPUs

Posted on 2025-03-19, 09:43

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Marco wrote on 2025-03-19, 08:41: Done. Also without L1 it will crash. Very strange. Maybe power supply issue? Update: tested with second PSU. Same. My suggestion contained two parts. When you wrote "done", did you try both suggestions?

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Re: Register settings for various CPUs

Posted on 2025-03-19, 00:15

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Minor update: I let my kids play Duke3D with the testbed system: 85 MHz SXL2 and AHA-1542CP. After 15 minutes, I hear some B&M ("bitch and moan"). Duke3D is hung with some DOS error layered over the game graphics, stating DOS cannot write to the HDD or something of this nature. When I inquired, I …

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Re: Register settings for various CPUs

Posted on 2025-03-18, 22:56

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What happens if you use a 33 or 40 MHz crystal oscillator instead of a 50 MHz crystal? Some CPUs won't clock double on certain motherboards, but the result is usually that the CPU stays in 1x mode. I've not experienced a freeze-up like this with clock doubling. The normal hang-up is when enabling L1 …

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Re: SIV support for 386/486/586 class + Alpha CPUs and 3dfx + S3 + SiS + Matrox + XGI + old ATI + NVidia GPUs - Testing

Posted on 2025-03-18, 09:21

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I remember reading it at the time; it became a big moderator cut. In my view, that crap was equally bilateral. As the author of this software is no longer responding to this thread, it might be best to un-sticky it.

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Re: 286 upgrade: Evergreen 486 SuperChip version D3 Rev.B, FPU not working

Posted on 2025-03-17, 07:46

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would guess that the jumper position 2-4 would be ASYN, but pin 4 isn't soldered on, and neither is the ASYNC crystal oscillator. This leaves pin position 1-2 and 2-3. I don't know what these two positions do. Having the pin in either position (without ASYNC crystal), doesn't affect the FPU …

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Re: PGA132 rotator boards

Posted on 2025-03-17, 05:55

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When you pull out VCC and GND to their individual planes, you will have less traces to route, saving some PCB real-estate. 180-deg is the most important rotation based on what I've seen in my giant stack of 386 motherboards. I'd suggest to Batyra that they start with this orientation. I have no …

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Re: What do you drive?

Posted on 2025-03-16, 22:54

by

by feipoa

in Milliways

in Milliways

I haven't bought a car since the 90's. I still drive my old cars. Am I helping the environment or hurting it?

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Re: 286 upgrade: Evergreen 486 SuperChip version D3 Rev.B, FPU not working

Posted on 2025-03-16, 22:40

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

lol I am crossing my fingers for you. In a months time though you will get a very authoritative "this is what works" answer off google or bing that is an AI rehash of your prior postings lol I see the 287 socket so we should not have to worry about motherboard not having x87 support in BIOS, but do …

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Re: 286 upgrade: Evergreen 486 SuperChip version D3 Rev.B, FPU not working

Posted on 2025-03-16, 13:37

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Soldered on an SXLC2, but as with the 1992 version, enabling L1 hung the system: Evergreen_SuperChip_SXLC2.JPG Next, I soldering on a Tx486SLC, which is the same model as the original chip, but a different chip: Evergreen_SuperChip_TX486SLC.JPG The Tx486SLC is in 1x mode only (Cx486SLC2 is always 2x …

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Re: PGA132 rotator boards

Posted on 2025-03-16, 12:29

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Batyra, do you know someone who is familiar with, or interested in, doing PCB layout? Your PM led me to believe that you may know someone. If yes, they can probably get a start with sphere's gerbers. There should be sufficient detail in this thread about my original proposal. I think we should …

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Re: 286 upgrade: Evergreen 486 SuperChip version D3 Rev.B, FPU not working

Posted on 2025-03-15, 12:52

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I figured out the probable pins for the 87SLC by looking at how an 87DLC QFP is wired on a PGA interposer and looking at the FasMath 83D87 datasheet. I took a shot in the dark to solder 10K resistors to R22, R31, and R32. I tried all combinations except for the case in which R31 and R32 both have …

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