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

Posted on 2019-10-27, 02:26

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh! I have very similar motherboard an simiral problems, but in my case - it counts time too quickly (like skips 2-3 seconds instead of 1)... Similar dammage too... I replaced ceramic caps which were cracked, but it didn't helped... which oscillator you replaced? 14.31818MHZ - usually 286 …

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Re: Missing parts on Voodoo 1 card (photo included), no 3D image

Posted on 2019-10-26, 22:33

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

from the picture they appear to have three legs and look like micro smd transistors, yeah I know there is a D. https://electronics.stackexchange.com/questio … igured-as-diode

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Re: PSU question - are voltage sense wires mandatory?

Posted on 2019-10-26, 22:07

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ahh ok I misunderstood, inside my psu case the 3v sense goes to solder thru hole with s+ (micro stamped on top of pcb) and the gnd sense does same to a s- right next to. Any marking on the PSU board you have ?

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Re: My Motherboard/ISA video/Big old HDD motherlode

Posted on 2019-10-26, 21:35

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Really nice work and am jealous of the big haul of goodies ! The octek board was super nasty and after the clean, its slots feel quite crusty ... getting the POST card properly connected to that board is quite hard. I sprayed some contact cleaner. It helped but it's not adequate. But at some point I …

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Re: PSU question - are voltage sense wires mandatory?

Posted on 2019-10-26, 21:20

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just checked one of my ATX with 20 pin, it has the 3.3 sense connected with a main +3.3v supply wire at pin 2, the GND sense is connected with main GND at pin 3. Here is a pic and you can sorta make out how there are two wires going to each of those two pins.

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Re: Missing parts on Voodoo 1 card (photo included), no 3D image

Posted on 2019-10-26, 20:42

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Those appear to be micro transistors or bridge type diodes and yes they are there. What is your main video card and are you using a short pass-thru (or a VGA extension) cable from the main vid card db15 to the voodoo input port ?

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Re: Opening HP Vectra VL Case

Posted on 2019-10-25, 03:17

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry no but did you read the manual, specifically: https://www.manualslib.com/manual/276849/Hp-V … ?page=29#manual It would help if you showed a picture of the front of the case because diff models had diff cases....

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Re: Pentium 2 VS 3 for period accurate win98 build?

Posted on 2019-10-25, 03:09

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yuuker wrote: Something semi-period accurate either in the 98, or 99 ish range. 1998 means slot-1, 1999 could be slot-1 or socket 370. Unfortunately during that period many things changed so it might be better if you choose a motherboard platform from that era and then start from there.

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Re: Friend's CT1600 not working - any possible way to test the card?

Posted on 2019-10-25, 01:56

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would replace those two dented caps just in case they are leaking (voltage) inside, might be causing the chips they are protecting to not function quite right or have shorted. I would not think using a DVM to check the Gnds and + supplies to each chip would do much harm though you may want to …

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Re: What PSU goes into this tower?

Posted on 2019-10-25, 01:42

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

pan069 wrote: Hey everyone, quick update. I found a full size AT power supply on Recycled Goods (with a dot com) and they were super helpful. They even tested it before sending it out! (Thanks again Dustin) Nice ! You must live near one of their outlets to get it that fast.

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Re: Bought these (retro) hardware today

Posted on 2019-10-25, 00:12

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice laptop and vid card ! All I could find of value in the last few days at the thrifts stores was a MS original Intellimouse (Serial and PS/2 compat w/adapter), a box of unopened Sony 5.25" HD floppies and a NSHL468 ethernet cable tester. $12 total but last month got a Leading Edge DC-2014 XT KB …

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Re: Ram with same make/clock speed but different timings and voltage

Posted on 2019-10-24, 23:54

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The ram with 1.8v is what I would use, that is the standard voltage of DDR2. The ones that require 2.1v to run at 800 would be inferior chips IMHO even though their CAS is lower because they require higher voltage to attain the 800mhz and CAS4 over 800Mhz and CAS5 of the ones at 1.8v. Sorta like …

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Re: P5PE-VM dying - advice on new 775 mobo?

Posted on 2019-10-23, 01:52

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Foxconn 865G7MF is similar to the Asrock 775i65g and Newegg has them new for $36. Free shipping in USA and seller has a good rating. https://www.newegg.com/p/N82E16813186060 used Asrock 775i65g https://www.ebay.com/p/74082135

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Re: looking for Cache chips

Posted on 2019-10-23, 01:38

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oops sorry wrong link. Looks like either Ebay from china of thru Aliexpress. There are 10ns, 12ns and 15ns but not sure how good they are. https://www.aliexpress.com/item/32274986746.html. I have 3 -486 boards that can use the 32pin but they are already fully populated with 28pin, and they are all …

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Re: Installing a DOS packet driver for Intel PRO/100 NIC

Posted on 2019-10-23, 00:24

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

did you try the other pro100 dos packet driver at ibiblio ? https://www.ibiblio.org/pub/micro/pc-stuff/fr … ml/e100pkt.html

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Re: looking for Cache chips

Posted on 2019-10-22, 23:28

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Warlord wrote: Anyone here can find me 128k x 8 15ns dip-32 sram 😠 😢 😐 😒 preferably not Chinese junk 😵 closest thing I could find is this: https://www.jameco.com/z/AS7C259-15PC-Major-B … 32_2288183.html What is the sram going into ?

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Re: Help finding info on some card - part II

Posted on 2019-10-22, 03:15

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Could be but the layout is all wrong for a variation where jumpers are replaced by switches

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Re: VTech / Laser computers history

Posted on 2019-10-22, 02:31

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes we had Laser computers here in USA, mostly XT, 286 and 386. There were also Leading Technology (PC Partner series) computers that also had some connection to Vtech way back in early 1990's that were 286 thru 486. I have a manual from a Laser Xt/3 and a working PC Partner QE 486 computer in my …

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Re: CMOS/BIOS battery for Toshiba Portege 610CT

Posted on 2019-10-22, 01:10

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My Tosh 100CS has a similar but slightly larger NiMH cmos battery, was able to buy similar local and just soldered the Tosh wires to it after removing the ones it came with. One thing: my Tosh manual states 24hours to fully charge it and lasts about 30days when off. Am sure your newer version Tosh …

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Re: 286 Tinkering - What Crystals?

Posted on 2019-10-22, 01:01

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

One thing to keep in mind is that changing the CPU clock will likely change the ISA bus speed and ram timing. At 24Mhz /2 for cpu and /3 for ISA so going to 32Mhz (for say a Harris 16mhz cpu) will put the ISA at 10.6 which most GOOD vid and IDE cards should handle but you would probably have to add …

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