Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on Today, 16:21

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have some good news and some bad news. The good news it I plugged the card into my DTK Data-1000 XT clone and it appeared to work, albeit with an incorrect color palette . The bad news is I have a TL866II and it doesn't support PAL chips...only GAL/CLD/PCLD. I do have a MEGA 2560 arduino, but …

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Re: Acer 500+ XT system

Posted on 2024-04-23, 02:24

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by kinetix

in Marvin \ System Specs

in Marvin \ System Specs

hello. I know it's an old post, but... I found one of the cards from this PC, like the VIO, but with missing parts, especially a PAL. but I have already restored everything, except the PAL. Could you, if you can, if you have the proper equipment, dump that PAL? and also the EPROM, just in case. and …

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Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on 2024-04-15, 01:50

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

about the image in the wrong color, I have seen it happen other times. Even recently in a YouTube video of "Adrian Digital Basement" he had to try several motherboards so that the color was correct with a card he was testing. I have already completed the work of putting all the missing components on …

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Re: FuryGpu - Custom GPU capable of playing Quake

Posted on 2024-03-29, 22:32

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by kinetix

in Release Announcements

in Release Announcements

Together with GraphicsGremlin (and its modified version with HDMI) this project is a good option. Of course it should have ISA, VLbus, PCI or AGP bus versions, instead of PCIexpress. Also need drivers that support OpenGL and DirectX

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Re: ALR Business VEISA 386DX 33

Posted on 2024-03-15, 03:03

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by kinetix

in Marvin \ System Specs

in Marvin \ System Specs

hello. I have not found the manual for this motherboard. The link in a previous comment does not work. Do you have any reference where to find it? https://theretroweb.com/motherboards/s/alr-business-veisa-asic I have one, yet to test, but I need all the information possible first. It's a shame I …

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Re: some help to repair/restore a leaking battery ravaged motherboard

Posted on 2024-03-15, 00:13

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had thought to do that too. a little hard because I dont had a de soldering tool.

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Re: some help to repair/restore a leaking battery ravaged motherboard

Posted on 2024-03-13, 23:34

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The -12V tantalum capacitor right at the PSU connector can be shorted or one of the 3 tantalums on the left side between the ISA slots. Shorting when powered on after a long storage time is a typical behavior of tantalums made in that period. You can remove all 4 of them or one at a time and test …

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Re: some help to repair/restore a leaking battery ravaged motherboard

Posted on 2024-03-13, 02:56

by

by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

any hint? I'm getting about 8 ohms between -12 and GND. I will remove the -12V tantalum capacitor to check if it is shorted.

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Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on 2024-03-12, 00:34

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://www.vogons.org/viewtopic.php?f=46&t=99081 well, I made some tests and I read several different PALs, GALs and PLDs with a Dataman-40Pro, all OK then I saw this. https://www.youtube.com/watch?v=qoY64kw9qd8 this guy does an very simple adapter to read a PAL (16V8), as it was reading an EPROM. …

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

Posted on 2024-03-09, 00:49

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well. I finally tested today a motherboard I was restoring/repairing. Yesterday I corrected the big mistake of having soldered the power connection the other way around, which, thank goodness, I realized. Everything was OK, everything measured correctly, all fixed lines ok, and no shorts. But it …

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Re: some help to repair/restore a leaking battery ravaged motherboard

Posted on 2024-03-08, 22:27

by

by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well. I finally tested the motherboard today. Yesterday I corrected the big mistake of having soldered the power connection the other way around, which, thank goodness, I realized. Everything was OK, everything measured correctly, all fixed lines ok, and no shorts. But it seems that Lady Luck is not …

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Re: Creating 80186 Based System

Posted on 2024-03-07, 03:49

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did anyone ever build the system (MPX-16) featured in the "Circuit Cellar" section of Byte magazine, Volume 7 Number 11 , 1982 (and v7#12 , v8#1)? Nope, but you got me looking at the first article. 120 IC, 5 layer board, that's a project and a half. I see the board listed as available for $300 …

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

Posted on 2024-03-07, 01:43

by

by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

one question. Did anyone ever build (MPX-16) the system featured in the "Circuit Cellar" section of Byte magazine, Volume 7 Number 11 , 1982 (and v7#12 , v8#1)?

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Re: Old computer magazines - Anyone got Circuit Cellar #66?

Posted on 2024-03-07, 01:42

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by kinetix

in Milliways

in Milliways

Did anyone ever build the system (MPX-16) featured in the "Circuit Cellar" section of Byte magazine, Volume 7 Number 11 , 1982 (and v7#12 , v8#1)?

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Re: Creating 80186 Based System

Posted on 2024-03-07, 01:39

by

by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did anyone ever build the system (MPX-16) featured in the "Circuit Cellar" section of Byte magazine, Volume 7 Number 11 , 1982 (and v7#12 , v8#1)?

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Re: some help to repair/restore a leaking battery ravaged motherboard

Posted on 2024-03-07, 01:27

by

by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I just "completed" the repair of this motherboard. It is the first one I have done with such a level of damage and it took me a while. some lines had just disintegrated. thank goodness I took enough pics beforehand, plus some found around in the web. BUT... When I was measuring everything for …

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Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on 2024-03-05, 04:32

by

by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

thank you so much. I am taking note.

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Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on 2024-03-03, 03:59

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ups. sorry here it is

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Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on 2024-03-02, 23:32

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently acquired a complete Acer PC-500+. I'm currently preparing a write up comparing it to it's cousin the Franklin PC-8000. For a "clone", the differences between the two are striking. The Acer has two main cards...a CPU card and an I/O card. Here are some additional photos of the cards from …

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Re: Some help with one interesting multifunction card (Multitech PC500+ II VIO)

Posted on 2024-03-02, 23:18

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by kinetix

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

this is my card. I´ve seen 3 slightly different versions, mainly in the stencil markings, and some resistors , capacitors and inductors missing or not. one have a 20V8 instead 20L8, so is a lot harder to reverse ing. please, can you tell me the values of the components (missing in my card) indicated …

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