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

Posted on 2018-12-29, 10:39

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Finally re-capped an MSI MS-6340 (Via KM133 chipset, from a Packard Bell iConnect). After working on 1990-era leaded solder, it's a shock how hard (in every sense of the word) the RoHS stuff is again. But that's just a temporary irritation. Now it's sporting flashy new Nichicon, Rubycon and United …

Re: MAT286 problems / won't start / Gate A20 error - please help with diagnosis

Posted on 2018-12-24, 14:38

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Had this A20 gate error on a 386sx motherboard, in the end the fault was defective KBC. My advice is to try and swap it, but if you care about your board, don't try this unless you have proper desoldering tools. All IMHO (in theory). If it was known for sure that exactly KBC is bad then removing of …

Re: MAT286 problems / won't start / Gate A20 error - please help with diagnosis

Posted on 2018-12-24, 13:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As it says on bioscentral for AMI BIOS Post Codes (After April 1990): 04 Passed keyboard controller test with and without mouse I think this mainboard was made after year 1992 week 10 (date code 9210 written on the chipset) So yes, the keyboard controller or its circuits might be damaged. PS Did you …

Re: PCI sound cards and Chipsets from various manufacturers...

Posted on 2018-12-24, 07:08

in Marvin \ Sound

in Marvin \ Sound

Hi, I just finished 2 videos demonstrating FM synth music quality of this PCI soundcards: Aureal Vortex AU8820B2 FM synth Yamaha XG YMF724F-V FM synth YMF724F-V + DreamBlaster wavetable synth http://www.youtube.com/watch?v=FmKdTKt75Kg - Doom http://www.youtube.com/watch?v=tU85u0EJ2yo - Duke Nukem …

Re: Replacing a choke coil

Posted on 2018-12-21, 07:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

gdjacobs wrote: You can measure L for the choke: https://daycounter.com/Articles/How-To-Measur … nductance.phtml Ferrites are variable in mu, so calculating isn't going to be accurate. I think the material of the core of the choke isn't ferrite. They are called iron powder cores.

Re: Replacing a choke coil

Posted on 2018-12-20, 08:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would try to find replacement on others damaged mainboards. A toroidal core of chokes are marked by colours. Colours depend on permeability. So you just have to find a choke with the same size and colours, the same quantity of turns of winding and the same thickness of wire.

Re: modify bios to add support for newer cpu's

Posted on 2018-12-19, 14:39

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

i will be investigating a bit more, i think i should find a similar motherboard but one that supports an e2140, then i will look at the code. Yes, something like a bios for P5VDC-MX V2.0 https://www.asus.com/supportonly/P5VDC-MX%20V2.0/HelpDesk_CPU/ I was wrong about P5VDC-X - it doesn't support …

Re: modify bios to add support for newer cpu's

Posted on 2018-12-19, 13:20

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

hi everyone i have an asus motherboard, it's a P5VD1-X, which only supports netburst 775 processors. i was wondering if it was feasible to add support for a mere Pentium E2140. i know that this processor uses the core architecture, and has lower voltage and many other differences, but is much …

Re: ECS SI54P-AIO hangs on boot - help!

Posted on 2018-12-16, 10:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've tried the RAM that was in the board when I bought it. I haven't checked to see if it is EDO or FPM. I did try two sticks of what I know is FPM. These sticks I use for testing in general and haven't had an issue. Are there some socket 5 boards which only accept EDO? I can hunt down some EDO- …

Re: ECS SI54P-AIO hangs on boot - help!

Posted on 2018-12-15, 19:25

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What about RAM? Is it FPM or EDO? Did you try to change type of RAM?

Re: Late ISA DMA motherboard?

Posted on 2018-12-09, 10:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

dionb wrote: If LPC DMA isn't enough and you need 'real' PC/PCI DMA, the last Intel southbridge to support it is the ICH5, which corresponds to the i865 and i875 chipsets and i848 , of course

Re: Bought these (retro) hardware today

Posted on 2018-12-02, 13:31

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

oeuvre wrote: Roman555 wrote: No today but recently. It's a PCI SATA RAID controller XFX Pevo64. I tried it with a Socket3 mainboard LS-486E and made a SST v4.78 report. *** ... put an SSD on a 486 😁 I haven't got any SSD, just CF and CF-SATA adapter

Re: Bought these (retro) hardware today

Posted on 2018-12-02, 11:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No today but recently. It's a PCI SATA RAID controller XFX Pevo64 . I tried it with a Socket3 mainboard LS-486E and made a SST v4.78 report. https://i.ibb.co/gZKF3K9/XFX-Revo64.jpg https://i.ibb.co/p2dMSGj/XFX-Revo64-loading.jpg https://i.ibb.co/cYJMQh7/XFX-Revo64-NSSI.jpg https://i.ibb.co/DzWv4tT/ …

Re: Help with VLB controller card

Posted on 2018-12-01, 17:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi! I think it helps (the manual is slightly different): http://www.computer-museum.net/docs/FEIOL-UC3Cusersmanual.pdf Also you can consider doing the modding in case your card has a problem similar to mine https://www.vogons.org/viewtopic.php?f=46&t=39993&p=705833#p705833 Leaving pins J12-J14 …

Re: Motherboard GA-5AX problem.

Posted on 2018-11-19, 17:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If I insert the diagnostic card to pci slot, post stops at code 410d, but if I insert the diagnostic card card to a isa slot it doesn't show anything like there isn't power at all. Edit: It seems that the diagnostic card is broken. It doesn't show anything in a isa slot even if I put it in a …

Re: Did PC-Chips ever release a high quality motherboard?

Posted on 2018-11-19, 08:00

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I liked my TOPGUN M575 (Ali Alladin IV+) featured with 1MB L2 cache, onboard sound and graphic bios. It was 30years ago.

Re: pc rom for Radeon ATI 7000 sapphire?

Posted on 2018-11-17, 20:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok. chrisNova777 , have you read this techpowerup guide ? It says there's a key to unlock the flash, but I don't know if it helps in your case. atiflash -unlockrom X where X - adapter number And could you write here a type of the flash chip? Some people used -sst key to force using sst flashing …

Re: pc rom for Radeon ATI 7000 sapphire?

Posted on 2018-11-15, 07:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

appiah4 wrote: chrisNova777 wrote: anyone know how to unlock the rom? It may be locked down in hardware if the -f switch in atitool does not work. As a last resort try UNIFLASH.. Yes, flash chips have a pin for "write protection". chrisNova777, would you upload photographs of the graphic card and a …

Re: Packard bell PB450 repair / mods / upgrade

Posted on 2018-11-11, 08:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Very interesting reading, including AMD/Cyrix CPU support, WB support, jumper settings, and other things. https://web.archive.org/web/20000817071146/http://www.firmware.com/support/bios/p4hs20.htm Yes. For example, I didn't know there're such things: Turbo speed switching is done with CTL-ALT-PLUS …

Re: secret board found. 815PE board with SB/LINK header!

Posted on 2018-11-10, 11:12

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is it a really secret mainboard? Or just QDI SynactiX from this list ?

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