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Re: S3 ViRGE VLB project (or " Making a Concurrent for Creative 3D Blaster VLB" )

Posted on 2022-02-18, 18:45

in Marvin \ Video

in Marvin \ Video

I actually have a few hundred of these SOJ-40 sockets on a reel. Could be used with more spacing between the chips on the PCB. Also those S3 Trio/ViRGE chips have weak 135MHz RAMDACs which blur the image at higher resolutions. They cannot even do 1024x768x32bpp without interlacing, so there's no …

Re: The World's Fastest 486

Posted on 2022-02-10, 16:21

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

BitWrangler wrote on 2022-02-10, 15:47: Nobody likes 180 though, it doesn't sound like a real speed, how about we rename it to "166+ Turbo" Even Intel sold 180MHz PPro and Pentium MMX Overdrive.

Re: An analysis of Warcraft 2 MIDI music on Roland synthesizers

Posted on 2022-02-04, 23:20

in Marvin \ Sound

in Marvin \ Sound

Roland SC-88 came with a 64-voice polyphony as well as the first Yamaha XG compatible synth, the MU-80. Although there were cost reduced models like MU-50 with only 32 voices. Although that's year 1994 for the SC-88 and 1995 for the MU-80 while the SC-55 was introduced in 1991. I recall E-mu Proteus …

Re: Lets make new M919 Cache sticks?

Posted on 2022-01-27, 17:11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sure thing it will do the job without much overclocking. Just checked, those IDT71V124SA12Y chips you put in are rated at 130mA each. That's 1.2A additional current on that LDO regulator. It doesn't seem real tough, could be an issue.

Re: Lets make new M919 Cache sticks?

Posted on 2022-01-27, 14:05

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looked at your schematics, it's really good that A18 and A19 lines are present in the slot. Makes things much easier. Is there any reason for choosing 3.3V SRAM chips other than general availability? I mean UM8881F is a 5V chip and probably expecting 5V signal levels. Should be fine this way at …

Re: FIC KC19+ (HP OEM) Motherboard Slot 1 with RDRAM

Posted on 2022-01-27, 00:15

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What issues are there with ECC memory on these RDRAM platforms? On RDRAM? None. Those Supermicro boards, P3DM3 and P3DME, used i840 with two SDRAM MTHs. Servers take a lot of memory and RDRAM's price was a no go. Besides dual channel memory bandwidth even with SDRAM exceeded system bus throughput. …

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2022-01-26, 02:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's better to install a 40-pin socket instead of soldering a 80C42 compatible controller directly to the board. It isn't 'cause chip in socket is too high and prevents some ISA cards from being fully inserted in slots 1 and 2. Anyway there's no way back to VT83C41 that doesn't require soldering …

Re: FIC KC19+ (HP OEM) Motherboard Slot 1 with RDRAM

Posted on 2022-01-26, 01:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That's a nice board BTW. HP used it for Vectra VL600 corporate PCs. 533MHz or 600MHz PIII Coppermine, 128Mb RDRAM, Matrox G400. Not bad at all, though I recall 128Mb RDRAM cost about $1000 those days. May take a PIII Tualatin with the right slotket. The onboard CS4280 + CS4297 audio bundle is a good …

Re: DTK 486VIP PKM-0039E BIOS and Jumpers Wanted

Posted on 2021-07-20, 14:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

By the way, I suspect this board has a SiS 471 chipset clone of some sorts (relabel), because: 2A4O3 D12-00 -> indicates a EFAR 802G + 100 combo (while this one has 802G + 810 + 100 instead) there is a board which uses both SiS and EFAR labels: http://www.win3x.org/uh19/motherboard/show/6895 (which …

Re: DTK 486VIP PKM-0039E BIOS and Jumpers Wanted

Posted on 2021-07-20, 11:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Reystlin wrote on 2021-07-11, 21:13: Hello everyone. There is one. Working. Still relevant? PS: Jumpers are under AMD-DX4-100 Can you upload a higher resolution photo, so I can actually see the jumpers? Thanks

Re: Old hardware giveaway thread.

Posted on 2021-07-07, 21:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Small flat rate will also do probably

Re: Old hardware giveaway thread.

Posted on 2021-07-07, 20:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is it small enough for the 1st class?

Re: The World's Fastest 486

Posted on 2021-06-22, 01:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It doesn't matter what revision of LS-486E you have. Only SiS 496 of PR stepping supports EDO properly. Older steppings such as OR, NV, NU, MU do not.

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-06-21, 09:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's better to install a 40-pin socket instead of soldering a 80C42 compatible controller directly to the board. The 74LS06 inverter is basically for PS/2 mouse support. 80C42 can run in either AT or PS/2 mode while this VT80C41 can do AT only. Although once you've got a 80C42 working, there's no …

Re: Aopen AX59 pro with general instability

Posted on 2021-06-05, 00:52

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

PLL malfunctions are very occasional in my experience. If you borrow a high speed scope, it should help. I use a 200MHz Fluke 199C for such purposes, but this thing is very expensive. I suggest to double check all SMD components around the PLL because they are more likely to fail.

Re: Aopen AX59 pro with general instability

Posted on 2021-06-01, 17:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If it works fine with a K6-3 or 3+ and the L3 cache disabled, then you need to replace those two cache SRAMs.

Re: The World's Fastest 486

Posted on 2021-05-11, 13:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

120MHz is easy enough. 133MHz is where the fun starts.

Re: The World's Fastest 486

Posted on 2021-05-11, 12:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cyrix/IBM PQFP 5x86 came with aluminium heat spreaders buried in molded epoxy while AMD chose copper heat spreaders. Makes some difference.

Re: Cyrix 5x86-133GP a unicorn?

Posted on 2021-02-03, 05:23

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd say an AMD 5x86-X5-133ADZ is the most affordable high performance 486 solution. You can glue a heat spreader to it and run without active cooling even with some overclocking like 4x40MHz or 3x50MHz . ph4nt0m - do you know how to achieve this? I have a dx50 and would love to find a replacement …

Re: Lets make new M919 Cache sticks?

Posted on 2020-12-29, 21:31

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Has any checked to see if the address lines for 512K and 1024K go to that cache slot? I suspect not. I was also wondering if 10 or 12 ns cache chips have been sourced NOS. The date codes on the chips suggest years 2001 and 2000. I have to dig up my M919 to check the address lines. Even if they …

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