Re: Sigma Designs EGA cards - a deep dive

Posted on 2020-10-10, 01:28

by

by the3dfxdude

in Marvin \ Video

in Marvin \ Video

While I don't know how the card divides the clock by two, I am positive it's not due to a divide-by-2 feature in the standard EGA registers that would be disabled by software setting custom video modes. If they would use the standard EGA divide-by-2 feature to get from 28.5MHz to 14.25MHz, how …

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Re: Sigma Designs EGA cards - a deep dive

Posted on 2020-10-10, 01:25

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by the3dfxdude

in Marvin \ Video

in Marvin \ Video

CLKSEL is bits D2-D3 of the 03C2 register, with four choices according to the IBM EGA Tech Ref: 00=14Mhz, 01=16Mhz, 10=EXT OSC (feature connector), and 11=unused. I think the usual configuration for "superEGA" cards is to connect the faster oscillators to CLKSEL=10 (since apparently nobody ever …

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Re: Sigma Designs EGA cards - a deep dive

Posted on 2020-10-10, 00:16

by

by the3dfxdude

in Marvin \ Video

in Marvin \ Video

So that renders this card useless for what I'm intending to do: 8088MPH-style register manipulations during the active video period. Which relies on having the 8254 PIT timer and the EGA CRTC both running from the same clock. (Obviously only in the 200 line modes.) Even though EGA offers a vertical …

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Re: Sigma Designs EGA cards - a deep dive

Posted on 2020-10-09, 21:53

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by the3dfxdude

in Marvin \ Video

in Marvin \ Video

But I want an EGA card that works in my Turbo XT at 10Mhz! So let's try the ERGO480.... it has two oscillators onboard, a 28.500Mhz and a 32.000Mhz; hmm, very close to 2x of the standard 14.318Mhz OSC signal and the 16.257Mhz oscillator that one expects an EGA card to use. No matter what I do, …

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Re: Acorp 5VIA3-P - MANUAL needed, pls!!

Posted on 2020-05-31, 15:59

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I knew I had an Acorp manual here, but just pulled it out, and it's for 5ALI61. Which of course is ALI chipset. However, it does have a jumper for the DIMM slots. It says that it supports 3.3V SDRAM if JP5 has both jumpers set to 1-2 and 5V EDO/FPM jumpered both to 2-3. Maximum for the DIMM slot is …

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Re: Acorp 5VIA3-P - MANUAL needed, pls!!

Posted on 2020-05-29, 03:09

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I knew I had an Acorp manual here, but just pulled it out, and it's for 5ALI61. Which of course is ALI chipset. However, it does have a jumper for the DIMM slots. It says that it supports 3.3V SDRAM if JP5 has both jumpers set to 1-2 and 5V EDO/FPM jumpered both to 2-3. Maximum for the DIMM slot is …

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Re: Diamond Monster 3D II (Voodoo 2) RevA Capacitor C46

Posted on 2020-04-15, 16:01

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I looked at a few other pics online. It's a common layout. And in every picture the caps are present. Do you know the full ownership history of this card? I have had my 8MB Diamond for more than 20 years (still second owner) and almost as long for the 12MB one, and they are well taken care of. If …

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Re: Diamond Monster 3D II (Voodoo 2) RevA Capacitor C46

Posted on 2020-04-11, 19:48

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I pulled out my Orchid Righteous 3D II 12 MB. It is almost 100% the same layout (minus a couple things I guess that never get populated?), but the writing is in different places. Board # is 9815. The caps C46 and C21 are there.

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Re: Diamond Monster 3D II (Voodoo 2) RevA Capacitor C46

Posted on 2020-04-11, 19:19

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You say Diamond Monster 3D II Rev A. I have a Diamond Monster 3D II Rev A. But yours is 12MB and has different RAM, and my card is 8MB. The silkscreen seems basically the same as mine, except mine says 9808 and your says 9818 in the writing in the image. Anyway my C46 is populated. But so is my C21, …

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Re: Trouble with Rhino MVP3-AT build and nVidia AGP cards

Posted on 2020-03-26, 16:38

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You ask how we survived the year 2000. Honestly by that point, if you bought a system to play games then, you were buying Athlon or P3. Socket 7 was around but it was the very low end and was at the point of being phased out. I had bought my K6-3 a year earlier, and I think I ran a voodoo 2 on it. …

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Re: Matrox Millennium G200 "No Signal" Issues

Posted on 2020-03-22, 23:40

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The BIOS recovery brought up my extra G200 PCI correctly. It won't be going into the trash now.

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

Posted on 2020-03-22, 20:59

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Spent way too many hours and 3 different set ups trying to get this mouse to work. No luck. Seen a few posts on here about mice with this switch but I just cannot get any joy from it. Annoying as my current project only has serial for a mouse. Don't trust what other people are saying about this …

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Re: Matrox Millennium G200 "No Signal" Issues

Posted on 2020-03-19, 23:44

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have two G200 PCI cards that I know both worked. Well trying both out a few weeks ago after sitting a few years in storage, one works and the other doesn't, in the machines they came in 23 years ago. Please share the steps for BIOS recovery and I will try it.

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Re: Long shot - need info for MTI R540 socket 7 board

Posted on 2020-02-22, 16:23

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is sw1: https://web.archive.org/web/20010621191933fw_ … com/R540j-2.jpg And sw2: https://web.archive.org/web/20010621191534fw_ … com/R540j-1.jpg See also the "manual update" https://web.archive.org/web/20010617124955fw_ … com/mupdate.htm

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Re: 486 Motherboard

Posted on 2020-02-22, 02:49

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, I have found errors on the net twice, nothing beats a copy of a manual so here you go. Let me know if you get it to work! https://www.dropbox.com/s/on95wa2wcp9e5s1/M-Technology%20Deep%20Green%20PC%20VESA%20486%20R407e.pdf?dl=0 It would be a good addition to the Vogons Drivers page in case an …

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Re: 486 Motherboard

Posted on 2020-02-20, 14:33

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Following up... Thanks for all the replies. I got the original manual on Ebay (M Technology R407e motherboard), so if someone needs it I'll be happy to scan it and post it here. Hi, like I said there is information on R407e already on the net, and mtech only posted partial information. Some of the …

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Re: Flakey 286 Issues

Posted on 2020-02-14, 14:47

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you checked to see if your power supply is ok?

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Re: What specs to look for to play DOS Quake, Diablo II, Warcraft III, etc. at HIGH native resolutions?

Posted on 2020-01-11, 21:21

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by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My treshold for "smooth" must be really low - in simulated LAN game (4 computers, me as observer, medium map) it still looks OK, even with some bigger fights taking place over the map :) Version is 1.00 - I guess in its current state, after many patches, the game is way more taxing then it once was …

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Re: A 286 computer, is it totally useless?

Posted on 2019-12-12, 19:09

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by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Aren't all PCs essentially based on 'accelerator things with faster CPUs'? I mean, a real PC is the IBM PC 5150, which runs on an 8088 at 4.77 MHz. Why does nobody use those for business applications? Actually, the 5150 was hugely popular for business. At least until the souped version of the PC …

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Re: 486 Motherboard

Posted on 2019-12-10, 13:59

by

by the3dfxdude

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello, does anyone has the M Technology R407e motherboard manual? If so, can you please scan it and post it here please!! I'm trying to set the jumpers for a CPU and found some info online but is inaccurate and don't want to fry something. Thank You! Are you sure you have the R407E? Please post a …

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