Re: Diagnosing and fixing old AMD386DX 40 MHz boads

Posted on 2020-07-10, 14:02

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did the keyboard work on yours? I have the same board as you (but with a socket instead of soldered CPU) and I've been bashing my head back and forth getting the KB to work. Same exact issue - corrosion from VARTA battery, but mine did POST (came with a TI 486DLC) and stop with a Keyboard error, …

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Re: Bought these (retro) hardware today

Posted on 2020-07-10, 10:01

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That P5HX looks gorgeous with all that white.

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Re: Bought these (retro) hardware today

Posted on 2020-07-07, 05:21

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

appiah4 wrote: OEM (Compaq?) ATI Radeon AGP (7000/7200/7500/8500/9000/9100 - who knows?) Mind checking if there's a PN on it? (other than Compaq/HP's) I managed to find out the exact specs for a Rage Pro Turbo AIW I had that way.

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

Posted on 2020-07-06, 16:04

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Were Utron chipsets really that bad? I've had a M559 once but it was DOA. As for VPX, I've had a EFA/EpoX VPX mobo, and it was actually rock stable w/ about 48MB worth of EDO SIMM sticks, and ran at a decent speed with 98SE, though I didn't have anything better than a S3 Trio 64V+ 🤣

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Re: Acorp 5VIA77 strange issue

Posted on 2020-07-06, 14:14

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, I'll check if it still works with JV_L2 removed. And you're right - JV_L2 is near the SDRAM slots, and L1 is near CPU. EDIT: Tried removing JV_L2 jumper and got met with a surprise - MMX chip now registers as PENTIUM-S CPU at 250MHz (250 is because that's how I set it, 100x2.5). Placing the …

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Re: Acorp 5VIA77 strange issue

Posted on 2020-07-06, 10:27

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Finally, it works! Apparently it needed both JV_L1 and JV_L2 jumpers to be shorted. I have no idea what do they do (Roman555 if you have any idea what are those used for, please let me know), but once I shorted JV_L1, both AGP and MMX chips started working. 2020-07-06 13.22.07.jpg 2020-07-06 13.23. …

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Re: Acorp 5VIA77 strange issue

Posted on 2020-07-06, 08:50

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Putting in a MMX CPU will make the board not do anything besides spin fans. I tried a MMX CPU w/ no RAM or anything else besides PC speaker and HSF. No beeps. I did notice the GF2 had artifacts on this board (as if it doesn't have enough power), while on a newer VIA 693 based Pentium 3 550MHz board …

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Re: What are builds you want to make someday?

Posted on 2020-07-06, 08:27

by

by PcBytes

in Marvin \ System Specs

in Marvin \ System Specs

I'd want to do a somewhat of a sleeper with these: -PCChips M577 -Pentium 233 MMX -3.2GB Maxtor + 850MB WD Caviar 2850 -ATI Rage Pro Turbo AIW -384MB RAM -SB16 PCI (CT5803) -Realtek RTL8139C NIC -circa 2003 Mercedes-styled case made by Linkworld (which isn't bad at all) -Windows 98 SE + 98lite 4.7

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

Posted on 2020-07-06, 07:44

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

VPX chipset should usually work pretty well, even if it's PCChips. Hope it doesn't have fake cache.

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

Posted on 2020-07-06, 05:09

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Horun - I've tried a P-150 (had that from a long dead Soyo 5TF) , a Cyrix 6x86 non-MMX and still, nada. What's interesting though is that I measured my caps, coils and regulators. I get all corresponding voltages on regulators and caps (2.8v and 3.3v, former was the MMX CPU VCore and the latter is …

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Re: Acorp 5VIA77 strange issue

Posted on 2020-07-05, 19:20

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Redid the solder joints on all the caps. Now AGP cards work (although a bit randomly), tested with both a Geforce 2 Pro and a Rage Pro Turbo AIW. MMX chips still do not work. I don't get any beeps at all when I power the board on with a Pentium MMX 233. Same chip works on a i430TX mobo.

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

Posted on 2020-07-05, 17:40

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Rebuilt 90% of a PCChips M577 mobo. Had missing caps, coils, RTC coin holder, missing AT P8+P9 connector, floppy and LPT headers. Sadly no dice: - ATX power doesn't work (won't turn on) - AT power works but no POST - CPU heats up (P233MMX) If anyone has any ideas what to do next, please tell me.

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Re: Acorp 5VIA77 strange issue

Posted on 2020-06-30, 08:14

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have 3.27 on both pins of the PSR16C40DT near the SDR slots, and 2.8V on the cap next to it. The one at the corner of the board (to the right of the coil) reads 4.9V (so around 5v). This is without an AGP card. With AGP card (Rage Pro Turbo AIW), I get 2.8V on both pins of the PSR16C40DT, and 2. …

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Re: Acorp 5VIA77 strange issue

Posted on 2020-06-29, 20:03

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You mean the big PSR16C40DT near the SDR slots?

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

Posted on 2020-06-29, 17:31

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I guess I'm the only one who wouldn't return and instead try and find a solution to have it working myself? 😀

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Acorp 5VIA77 strange issue

Posted on 2020-06-29, 11:30

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've been keeping it for a long time (it was upgraded to a Zida 6DLX after the issue happened) but I'd like to try and fix it if possible. Issues: - will POST ONLY with any non-MMX Pentium chip, Cyrix 6x86 non-MMX and any CPU that does not require dual-voltage - will NOT POST with any MMX Pentium …

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Re: What is your weirdest troubleshooting experience when dealing with retro computers/hardware?

Posted on 2020-06-24, 17:05

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ykot wrote on 2020-06-24, 14:46: SOYO motherboard that won't cold boot Tried replacing the caps? My 6BA +IV did that from time to time prior to recapping, and it went away after.

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

Posted on 2020-06-22, 17:26

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

IBM had Vanta cards in some of their Netvista P4 machines, so not so surprising.

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Re: Bought these (retro) hardware today

Posted on 2020-06-21, 20:51

by

by PcBytes

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's been a while since I posted here but here's today's purchases: https://www.vogons.org/download/file.php?mode=view&id=86461 ATI 3D Rage Pro Turbo AIW 8MB. Works fine, was just dusty. https://www.vogons.org/download/file.php?mode=view&id=86462 Left is what I assume a Shuttle board (not sure, but …

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Re: Romanian Retro Pc

Posted on 2020-05-05, 18:16

by

by PcBytes

in Marvin \ System Specs

in Marvin \ System Specs

IIRC from what I've heard, there's a WinME copy that is crash free, with the trade-off being to defrag the HDD continuously. Though I can tell why it's not liked as much, removed real-mode DOS isn't really that cool.

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