Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-11-27, 18:20

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I like to use MLCC SMD capacitors, around 10uF to 22uF for this CPU, 6.3V voltage rating too for 386 and 486 class. Yet, the small SMD capacitors on the CPU package is minor role in your photo and is much later. The most of the ESR comes from capacitors on the that are pentium and later …

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Re: If you have a Compaq LTE series laptop with a broken floppy drive, check the belt!

Posted on 2022-11-27, 02:16

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes that one. I got two from this while ago. Cheers,

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Re: If you have a Compaq LTE series laptop with a broken floppy drive, check the belt!

Posted on 2022-11-27, 01:47

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Infamous W1D indeed. Yes, there a seller selling new belts for these on ebay. Cheers,

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-11-27, 01:11

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

CPU needs massively low resistance equivalence for CPU's voltage core . Much less capacitor's ESR so as voltage get less. Cheers,

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Re: Gpu advice needed for a WinXP build.

Posted on 2022-11-26, 22:06

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

GT310 is really low end and will not offer much even on low details, go with GTS250, will let you have stuff on medium with 1280x1024. If 1080p, there will be loss of performance. Get a GTX 285 later on. I know this, as I had played with low end video card due to cost on PCs I had back in the day. …

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Re: Anyone own an Asus PCI/I-P54TP4 with pipeline burst SRAM? Planning to mod direct-mapped SRAM to pipelineburst

Posted on 2022-11-26, 01:28

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I thought Asus firmware is same for this board for either pipelined cache or async cache unless this custom board was created solely for one maker? Had you have installed '245 buffers yet? Does the silkscreened on the board itself have jumpers that shows pipelined cache and async cache …

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Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2022-11-26, 01:04

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A coworker planned to throw out a Compaq Deskpro 50M and I said not without me checking it out. Dirty with spots of dust here and there. I knew nothing about these PCs and hoped it'll be a 486 VLB system, since I'm planning to build one for a while I didn't want to pay the price of the mainboards …

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Re: Bought this (Modern) hardware today

Posted on 2022-11-25, 01:32

by

by pentiumspeed

in Milliways

in Milliways

Got a nick somewhere or got hit on low quality tempered glass. The digitizer glass on phones and tablet is properly tempered, and take lot of stress, can be bent over 50 degrees before breaking, till it get scratched will start crack into several cracks, but not shatter into little pieces like you …

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Re: Rarest CPUs?

Posted on 2022-11-24, 01:34

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, dual plane for sure, I tested this long ago, still have the processor. I confirmed with this Pentium 90 2.9V. Cheers,

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Re: Rarest CPUs?

Posted on 2022-11-23, 22:26

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a pentium 90 in TCP package on a adapter to fit into socket. Also 2.9V. Does works in dual voltage plane boards even FX chipset if it has socketed VRM and later boards as well. Cheers,

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Re: Oak Oti 077 repair

Posted on 2022-11-23, 00:05

by

by pentiumspeed

in Marvin \ Video

in Marvin \ Video

Yes, TL431, an programmable constant current source. Very common part and easy to find, inexpensive.

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Re: Bought these (retro) hardware today

Posted on 2022-11-22, 23:52

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A few items showed up this past week, including a BlasterBoard and Roland SCB-55. Plus managed to obtain original disks and user guide for the Epson Equity III+, and a bunch of memory chips destined for the memory card in that computer. Assuming they all work, that should give me 8 MB of RAM in …

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Re: The success rate of repairing modern GPU cards vs buying reliable GPU card.

Posted on 2022-11-21, 17:08

by

by pentiumspeed

in Milliways

in Milliways

What can I do to lessen the chances of these so called "exploding"? Anything else I can do about this? Buying new one at full price is not feasible. What about AMD GPUs? Cheers,

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The success rate of repairing modern GPU cards vs buying reliable GPU card.

Posted on 2022-11-20, 18:24

by

by pentiumspeed

in Milliways

in Milliways

Other day, repaired the blown components (literally blew off and melted inductor SMDs, on this one used 5 small inductors in parallel at power input), and replaced the shorted power MOSFET, did check stuff and is not abnormal anymore, even the gate pin is good means gate driver IC is fine on a EVGA …

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Re: What retro activity did you get up to today?

Posted on 2022-11-20, 02:31

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Finally located 5 pieces of 20MHz oscillator in SOJ package for reasonable price. Ebay search didn't include this seller, it was in the links bar below the another through seller's main store links while looking at their 20MHz oscillator which costs 3.5 times as much. For the experiment with slowing …

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Re: What retro activity did you get up to today?

Posted on 2022-11-18, 23:39

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought electronic components including 33MHz and 25MHz plastic package oscillators to modify a compaq motherboard to run 12.5 or 16.5MHz 386 or 486 for experiment with slow down method for some "touchy" games. Cheers,

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Re: Weird the p próbę on a Slot 1 motherboard.

Posted on 2022-11-16, 22:53

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, a temperature probe. This started with socket 462 era. Cheers,

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Re: Would anyone happen to recognize the description of an old Pentium 4 PC I had?

Posted on 2022-11-16, 16:13

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Get a different case and different hardware but still get a P4 instead to relive your vintage computing experience? Cheers,

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Re: Would anyone happen to recognize the description of an old Pentium 4 PC I had?

Posted on 2022-11-16, 00:28

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Blue logo is actually large "Dell" in blue. Started doing that in Pentium through PIII days. Well, mine is slot 1 PIII based on Intel SE440BX board. If from work, he probably had bought in a server used as PC as they have round holes. HP and Compaq does not. https://www.ebay.ca/itm/133846792754?hash …

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Re: New find, two ST412/ST506 mfm drives.

Posted on 2022-11-15, 23:55

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

These ST412 is 10mb and ST506 is 5MB. Not much to do with it, imagine few 720K floppies on one of these! If I recall correctly both are non-intelligent stepping means the controller card had to manually step through cylinders. Later MFM drives had microcontroller onboard which controller card do is …

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