Re: JUKO NEST XT board questions (manual attached)

Posted on Yesterday, 15:36

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That would basically be setting the duty cycle. 8086 is always 33%, and V30 can be either 33% or 50%. I soldered in the two jumpers. J11 doesn't seem to do anything as far as I can tell. J9, when open (the default is closed) causes the system to not boot up. Memory wait states can be adjusted using …

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Re: JUKO NEST XT board questions (manual attached)

Posted on Yesterday, 09:33

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Anyone have any idea what jumper locations J11 and J9 might do? They are unsoldered on my board, and not mentioned in the manual. If I had to guess, I'd say J9 probably controls DRAM wait state 0/1, and J11 might be duty cycle 33%/50%.

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Re: Should a Diamond Speedstar Pro (CL-GD5426) work in Win3.1 in 286 real-mode?

Posted on Yesterday, 06:06

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay, I read the disks. They're still good. I saw there's a folder for GEM on one of the disks too. I checked the manual. There are GEM drivers. It doesn't mention if the drivers are for the VGAWonder or the Ultra section of the card. It also doesn't mention if they're 256 colour or not.

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Re: JUKO NEST XT board questions (manual attached)

Posted on 2021-09-22, 07:20

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's where those NEC 8087s come from: Yaskawa Electric JANCD-HA03 Control Board REV.B D70116C PLC AUTOMATION CARD Search for that on eBay if you want to see a photo.

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Re: JUKO NEST XT board questions (manual attached)

Posted on 2021-09-21, 13:21

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I got a receipt from CPU Shack. You can always just send him a PM to find out.

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Re: JUKO NEST XT board questions (manual attached)

Posted on 2021-09-21, 06:27

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cpuworld might have more. I’d also be really interested to know where they came from.

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Re: JUKO NEST XT board questions (manual attached)

Posted on 2021-09-21, 01:38

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Recently some 8087 clone FPUs from NEC were discovered. Supposedly they are CMOS too, which implies they may be okay at speeds that exceed 10MHz. Anyone else buy one?

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Re: How to properly add 80287 NPU

Posted on 2021-09-16, 01:23

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The only reason 287XL is only rated at 12.5MHz is because intel never made 286s faster than 12.5MHz.

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Re: How to properly add 80287 NPU

Posted on 2021-09-14, 15:33

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Try cpu world. You might get a price lower than 25. In my opinion 287xl is worth your trouble if you want an fpu.

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Re: Computrend Systems Contaq-486 Motherboard

Posted on 2021-09-14, 05:50

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Where did you find the MR BIOS image? Was it from here: How about a MR-BIOS ROM file repository? ?

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Re: 486DLC/TI486SXL interposer board for cache coherency

Posted on 2021-09-14, 05:44

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by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cyrix had a kit that came with one of these too. It was called the 486DRu. The CPU was a regular DLC-40, but their interposer added clock doubling circuitry in addition to the cache coherency. I guess since you already powered yours on, it probably doesn't clock double since I assume you had your …

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Re: 286 "CHIPS" mainboard with missing parts...

Posted on 2021-09-14, 05:37

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you try powering it on? Sometimes the chips that go in the empty sockets aren't needed.

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Re: How to properly add 80287 NPU

Posted on 2021-09-14, 05:35

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cyrix and IIT are good choices too if you can find them. The 80287XL is way easier to find and probably cheaper too. The original i80287 is only made up to 10MHZ and NMOS (very hot), so avoid those. AMD is probably not worth bothering with either as they are normally only found as 10MHz parts.

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Re: Win98SE + P4 Build

Posted on 2021-09-14, 05:21

by

by Anonymous Coward

in Marvin \ System Specs

in Marvin \ System Specs

Most of the games you have listed are for DOS. You'd better go with a Socket7 build instead. You can always build a second more powerful system for the few 3D games on your list.

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Re: Old BIOS modding tools?

Posted on 2021-09-13, 14:01

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Except for 808x and 80286, I am not that familiar with the Phoenix BIOS. Can v2.0.18E edit 486 BIOSes?

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Re: Bought ViewSonic monitor - image too wide

Posted on 2021-09-11, 12:44

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by Anonymous Coward

in Marvin \ Video

in Marvin \ Video

Viewsonic monitors were very nice when new, but at least the ones from the late 90s didn't seem to last very long. I knew a whole bunch of people that had them, including myself and they usually only lasted about 3 years with casual use. Maybe they had a bunch of those leaky capacitors in them.

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Re: Need motherboard for InWin A500 case ?

Posted on 2021-09-11, 12:36

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I really liked those Powerman PSUs. They seemed very similar to the old FSP PSUs, though I don't think I ever seen a 300W one (most I seen are the 235W and 250W varieties). I am fairly certain that the Powerman that came in my H500 was a 300W version. Sadly I think it was lost during my big move. …

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Re: Need motherboard for InWin A500 case ?

Posted on 2021-09-11, 02:56

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recommend an i820 Camino motherboard with RAMBUST, a Pentium III 1133 (not the re-issue, the original coppermine version), an IBM Deathstar 75GXP (the more platters the better), and a Bitchin' Fast 3D. Only use power supplies usingthe finest Taiwanese capacitors made between 1999~2006.

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Re: This slocket adapter allows 3.5V to be sent to the processor

Posted on 2021-09-11, 01:21

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Stick a P133 on there and see what happens.

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Re: Upgrade Path for P54VL-PCI Socket 5 Board

Posted on 2021-09-11, 00:39

by

by Anonymous Coward

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Huh, go figure. I haven't seen too many EISA Pentium boards anyway. It seems like there's more 486 ones out there, and the SiS chipset on the NICE Super VL/EISA is more than fast enough for some fun EISA action. I did see a dual Socket 5 EISA board a while back on eBay, but the price hurt to look …

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