Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2019-03-20, 19:29

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got a bit lucky this time and found a guy who was willing to just give away this stuff: https://i.imgur.com/eiQuDf0.jpg?1 https://i.imgur.com/HGbBZZS.jpg https://i.imgur.com/4m0kvse.jpg Lots of video cards, some sound cards, radio tuner for ISA, some modems or isdn cards and tv tuners, and the most …

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Re: Bought these (retro) hardware today

Posted on 2019-03-13, 13:07

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

twilliamc wrote: It's output does not look very sharp on the CRT and it goes dim sometimes when the XT attempts to seek the floppy disk. Replace/fix the power supply! The voltages are probably way off, especially, when on load of floppy drive...

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Re: Windows 95 *actual* minimum system requirements?

Posted on 2019-03-12, 19:39

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by GigAHerZ

in Marvin \ Software

in Marvin \ Software

I've run Windows 95 on 386SX 20MHz, 8MB ram and some random 512k videocard on a 99MB HDD. It was awfully slow, but it worked. So how big of a masochist are you? I wanted a null-modem serial/parallel cable to be used to mount network drive from another computer and i didn't have any knowledge other …

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Re: Windows 95 *actual* minimum system requirements?

Posted on 2019-03-12, 08:33

by

by GigAHerZ

in Marvin \ Software

in Marvin \ Software

I've run Windows 95 on 386SX 20MHz, 8MB ram and some random 512k videocard on a 99MB HDD. It was awfully slow, but it worked.

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Re: Dos 6 conventional memory tricks

Posted on 2019-03-05, 11:41

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by GigAHerZ

in Marvin \ Software

in Marvin \ Software

retardware wrote: You could simply reserve the UMA memory and add it to the chain of free conventional MCBs to obtain more than 640K conventionally accessible memory. Easily doable by small TSR. Is there such a TSR somewhere already made?

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Re: 286 16MHz, 4GB RAM

Posted on 2019-03-01, 06:13

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by GigAHerZ

in Marvin \ System Specs

in Marvin \ System Specs

rmay635703 wrote: $400,000 is a very affordable and common price for a 286 The thread had 4GB in heading (now fixed), you can still see it in posts' headings...

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Re: Need right serial port cables ?

Posted on 2019-03-01, 06:07

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Take the plastic part off from the port side (the side that mounts to a case) and just rewire it the other way around. There are 2 options, how it is wired currently and you just need the other option...

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Re: Need right serial port cables ?

Posted on 2019-02-28, 20:38

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, the cable is either staggered or sequential on the port side. Just resolder it the other way around and you're done. Yes, there are 2 parallel standards in existance...

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Re: 8BIT ISA SERIAL I/O TO PS2 MOUSE

Posted on 2019-02-28, 18:36

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now this is where i lack some knowledge - do those dual serial chips allow to disable one serial port, if wanted? Maybe we could have second COM enable jumper? Dual UART in plcc44 uses chip select and channel select inputs, with chip select the computer cpu selects the whole DUART while with …

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Re: 286 16MHz, 4GB RAM

Posted on 2019-02-28, 16:44

by

by GigAHerZ

in Marvin \ System Specs

in Marvin \ System Specs

Intel486dx33 wrote: RAM was expensive back in 1993. 1mb. Of ram use to costs $100 […] Show full quote GigAHerZ wrote: 4GB of RAM!? 😜 RAM was expensive back in 1993. 1mb. Of ram use to costs $100 I don’t know the manufacture date of that 286 but I am sure ram was expensive back then. Okay? What are …

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Re: 8BIT ISA SERIAL I/O TO PS2 MOUSE

Posted on 2019-02-28, 15:41

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now this is where i lack some knowledge - do those dual serial chips allow to disable one serial port, if wanted? Maybe we could have second COM enable jumper?

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Re: 8BIT ISA SERIAL I/O TO PS2 MOUSE

Posted on 2019-02-28, 10:57

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Madowax, this is absolutely no problem! :) The thing today looks already amazing. My 2 cents are basically only about getting more features out of it with almost 0 cost. :) The RS232 driver and DB9 connector can even be made in one or another way optional. (unpopulated pads for driver and pin header …

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Re: 8BIT ISA SERIAL I/O TO PS2 MOUSE

Posted on 2019-02-28, 07:57

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why not to keep it really simple? Having a PS/2 port + another COM port just because it can be had almost for free? (As there are dual serial controllers around) Other stuff needs additional chips and make it more complicated... no need for than with this nice little 8bit card.

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Re: 8BIT ISA SERIAL I/O TO PS2 MOUSE

Posted on 2019-02-27, 16:02

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Serial ports are great! It's fun to play around with (emulated) modems over serial port and link computers with null-modem cables...

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Re: Found the vintage PC motherlode...

Posted on 2019-02-26, 20:01

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by GigAHerZ

in Milliways

in Milliways

True... That job is more perfect, when you are already financially free. 😀 (Like everything) Still, amazing oportunity. Take the best and fullest of it!

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Re: Found the vintage PC motherlode...

Posted on 2019-02-26, 11:42

by

by GigAHerZ

in Milliways

in Milliways

Damn, that would be a dream job to have... Checking old hardware, reparing them and putting them on sale in mint condition every time, all the time.

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Re: Dallas battery replacement ?

Posted on 2019-02-26, 10:43

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by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

canthearu, yes, i've done that as well. Yet, with 12885 (which should be direct replacement to 12887 except battery and crystal, which itself should be direct replacement to 1287) you don't need to do anything except 4 pin soldering. It's just a classic PDIP28

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Re: Dallas battery replacement ?

Posted on 2019-02-26, 08:54

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Quick tip: You can replace 12887 with 12885, which doesn't have a crystal nor battery. (Just a chip) If motherboard supports (i'm in the middle of converting Acorp 5vx32), you can just replace it and motherboard will provide power and crystal clock. If you want, you can add the crystal and battery …

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Re: Trying to get a windows 95 game to play on windows 7

Posted on 2019-02-25, 07:20

by

by GigAHerZ

in Windows

in Windows

Full blown emulation - virtualbox, vmware, pcem, qemu, pick your favorite.

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Re: 286 16MHz, 4GB RAM

Posted on 2019-02-24, 17:03

by

by GigAHerZ

in Marvin \ System Specs

in Marvin \ System Specs

4GB of RAM!? 😜

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