Re: 3 (+3 more) retro battle stations

Posted on 2022-01-22, 05:19

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

@novanick That motherboard is not with me anymore, but asked buyer if he can snap photos of the manual. Will let you know what he says. @bitwrangler Agreed. From a practical standpoint (what?!) 4x50 is the thing to do. We kind of beat the 180/200mhz horse to death already anyway.

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Re: The Christmas that happened 21 years later - my "new" 440GX based dual P3 monster workstation, web server and dev bo

Posted on 2022-01-21, 02:18

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

my reply got stuck as a draft. yes, coppermines work on this board. was not able to run tualatins on it.

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-17, 21:41

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Remember looking at 4x50 but didn't capture notes/metrics because it was slower than 3x66. One of the 5x86 ADW CPUs here can do 3x60 on air cooling but is not 100% stable if pushed hard enough. It needs 5V Peltier help (possibly lower) to get into 3x66, but again - not fully stable. For fully …

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Re: 486 L2: Comparison between Write-Through & Write-Back (with and without dirty tag ram)

Posted on 2022-01-17, 05:28

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Right on. In addition - on software level - compilers extend coverage so much these days, but still: Vectorization Data/cache alignment Data caching / lazy computation Stack allocations when possible Stay on the cached data for as long as possible Data prefetching And few others that I cannot think …

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Re: The Christmas that happened 21 years later - my "new" 440GX based dual CPU monster workstation, web server and dev b

Posted on 2022-01-17, 02:20

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Great stuff. 2 years ago I went through similar excersise for a graphics and software development workstation, including a giant post on the forums about it. Lots of similarities 😉 I would go with stronger cpus tho. Still 550mhz is pretty ok.

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Re: The World's Fastest 486

Posted on 2022-01-17, 00:50

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@chadti99 I was able to find a memory module that allows DRAM SPEED = FASTEST for the LuckyStar D motherboard. Updated the related post with bunch of screenthots and summary in the middle. Some of the improvements: + 0.4 fps in Wolf3D (148.7 fps) + 0.2 fps in PC Player Benchmark (29.8 fps) + 0.1 fps …

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Re: OR840 computer

Posted on 2022-01-17, 00:24

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Power supply notes were for you PC not turning on. BIOS/RAM notes were for if it eventually turns on.

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Re: 486 L2: Comparison between Write-Through & Write-Back (with and without dirty tag ram)

Posted on 2022-01-16, 16:05

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That is the theory and you are correct. However some boards deliver better perf in WT mode. At the same time other ones based on the same chipset do better in WB. It does not feel like flawed wb support since using dirty bit or not makes a difference which indicates that wb+db is handled.

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Re: OR840 computer

Posted on 2022-01-16, 08:39

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This motherboard requires special power supply. The one on the picture looks like it, but don't see the special secondary connector to tell. If it is the right PSU - both power connectors need to be plugged. The typical weird big brand stuff. There was something with BIOS versions and size of memory …

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Re: Simplest way to mount SAMBA share on DOS with packet driver and mTCP

Posted on 2022-01-11, 05:53

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Check FreeDOS if you are ok with that DOS flavor.

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2022-01-09, 19:11

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Forgot that the memcard was still not with you. At up to 20mhz most peripherals do just fine.

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-09, 09:13

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Hornet Technology VL-300 - one more VLB multi-io controller with full set of interfaces - SCSI/IDE/FDC/COM/LPT. Based on Adaptec AIC-6360L for SCSI, Adaptec AIC-25VL01Q for IDE and UMC chip for the COM, LPT, joystick, etc. https://petershipkov.com/temp/retro_pc_images/components_lo/ide_vlb_vl-300. …

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2022-01-08, 05:04

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Disappointing. These cpu upgrade modules are flaky pain in the a. So, you are confident that no combination of these switches unblocks the L1 cache ? As mentioned before I am able to run sxl2-50 at up to 70mhz on these vlsi mobos, but the practical limit is around 64mhz. Not sure this is a valid ref …

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Re: Outrigger: an ongoing adventure with the OR840

Posted on 2022-01-05, 03:45

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Got rid of a Type 6868 motherboard last week. It had one of these adapters on it, but i think i have spare. Will check and let you know. Bought it (the adapters) at end of 2020 beginning of 2021 from some online store selling old server hardware. High chance they still have some. Remember that …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-03, 19:39

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

200MHz (4x50) is stable with the tightest timings. Still, performance is lower than 3x66 with 3-1-2/3 and DRAM SPEED = FASTER. Never checked thoroughly the 3x66 option other than some vertical tests. Will try that soon. Thinking to attempt to move that 180MHz PC to 200MHz. Will see how it goes.

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-03, 15:29

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

I bought from Kynix. Chadti99 bought from 5here too I believe. What is your source ?

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-03, 05:17

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

I shouldn't reply but let Feipoa clarify because iu didn't actually do this mod myself. So today i was able to run 3x60 with cache timings 2-1-2, DRAM SPEED = FASTEST with 16Mb module. +0.1 fps in Quake 1 (20.5), so it is possible. But system is not fully stable. Same mem stick can do 200mhz at 212, …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-03, 01:22

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Either replace the resistor or connect the trimmer sequentially. If you run your Peltier at 5v then you can actually avoid condensation. Several posts ago I posted about how I did it.

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-02, 18:03

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

@Feipoa Yes, that was a bit of sarcasm. Pretty sure VLSI-200 floppy issue has nothing to do with CPU upgrade module damaging things. Tested it on the board that never had CPU upgrade on it. It is a BIOS issue. It always reverts to 360 floppy drive. I was so sure floppy worked back then, but maybe …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-01-02, 03:34

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

huh. If you plan on doing more, it might be a good idea to place the DMM's thermocouple tip right at the point of the solder to see how hot the solder is really getting. The tissue I had when using the rolled up aluminium balls is that the PCB's are rather challenging to balance and you will …

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