Re: Replacing an AT power supply with a 3.3V rail
Posted on 2020-09-21, 16:11
You can use ATX power supply with AT adapter and make additional 3.3V connector (orange wires).
Re: How to power this ISA backplane computer?
Posted on 2020-09-19, 22:02
There are screw terminals marked by the arrow. You need to attach wires with proper voltage to them. You could use AT, ATX or custom power supply. Simplest, but destructive (for power supply) way: use old ATX (or AT) power supply you don't care about and strip the wires. Match colors of wires. …
Re: Photographing processor silicon - starting with a Pentium Pro
Posted on 2020-09-11, 14:49
Nice! After seeing these photos I started to wonder how likely is the CPU to work after exposing the die. Here is one video with 486 that supposedly works, and it's even not in clean environment https://www.youtube.com/watch?v=3L03k21RDhE I was thinking about using apple watch tempered glass screen …
Re: Anyone know where to find ATX 20 pin -5v adapters in 2020?
Posted on 2020-09-03, 20:39
You could also use this module, solder GND to GND, +5V to VIN and it will output -5V on -VOUT pin https://www.ebay.com/itm/LM2662-Switched-Capacitor-Positive-to-Negative-5-5V-200mA-Voltage-Converter/114190379944 you could also add a capacitor (100uF or larger electrolytic rated for 10V or more) on …
Re: Programming on DOS/Windows 95/98
Posted on 2020-09-01, 23:48
I only have some experience with rapid GUI application development, Borland C++ Builder 1.0 - not open source but old CDs are available for 10-20USD (license is bonded to the disk so if you own it you can use it), IDE works natively on NT 3.51 and 95, you can target Windows 3.11 with win32s addon. …
Re: Thinkpad 701cs with cracked hinge
Posted on 2020-09-01, 19:02
I've had good luck with superglue only when glued parts didn't receive any mechanical stress (like glueing a decorative panel to a case). When there was any kind of flexing involved, parts would separate very quickly and it would be hard to clean off the remaining glue before trying something better …
Re: Thinkpad 701cs with cracked hinge
Posted on 2020-08-30, 20:58
Here you can look up some hardcore methods for case restoration: https://retrohax.net/commodore-sx-64-keyboard-restoration/ do you have a photo?
Re: Uncommon mini pentium3 motherboard
Posted on 2020-08-30, 13:07
Those small components are SMD fuses. Most likely for keyboard and USB ports. Shouldn't be critical for the board to work. But i wonder why were they replaced, maybe just some faulty USB device was plugged in. Similar small board is Chaintech 6via5t if you are interested in finding more like this …
Re: 1990's laptops with good screens?
Posted on 2020-08-29, 23:59
Anonymous Coward wrote on 2020-08-29, 23:45: Maybe there are good ones compared to what the competition was offering, but colour reproduction was an issue with LCDs until at least 2010. Well, that's true. But difference between DSTN screens like this one: Filename sni-14.jpg File size 864.28 KiB …
Re: 1990's laptops with good screens?
Posted on 2020-08-29, 22:42
It's hard to predict the quality of whites because it depends on the ageing of fluorescent lamp. But all laptops with TFT screens ("active matrix") are superior to everything else. STN screens are a joke and are totally useless for games or multimedia. But they could be even $1000 cheaper ( …
Re: List of open-source PC hardware projects
Posted on 2020-08-28, 23:08
Some projects I remember: Sergey's Projects http://www.malinov.com/Home/sergeys-projects (AdLib, ISA Super VGA, Micro 8088 board and more) PS/2 to serial adapter https://www.vogons.org/viewtopic.php?t=42862 https://github.com/matze79/PS2-Adapter/ MicroATX Turbo XT Motherboard https://www.vogons.org/ …
List of open-source PC hardware projects
Posted on 2020-08-28, 23:08
Do we have a list of open-source hardware projects (with published schematics, PCB files, firmware) here? I see lots of modern hardware replicas and addons, some of them are DIY-friendly and it would be nice to have them listed.
Re: Switching between internal and external Ethernet connection with passive splitter? (internal wifi router)
Posted on 2020-08-28, 16:50
I already have this https://openwrt.org/toh/unbranded/a5-v11 flashed with OpenWRT and it works fine for me. Regular router won't do because i'm putting this inside T3200SXC laptop :) i will get +5V directly from the network card and the router will be piggybacked with RJ45 connector desoldered. You …
Switching between internal and external Ethernet connection with passive splitter? (internal wifi router)
Posted on 2020-08-28, 12:41
I would like to solder an OpenWRT wifi module to 3C509B ISA card https://www.vogonswiki.com/index.php/3Com_3c509 so the machine would be able to connect to wifi through internal network card and packet driver. But I would like to retain the ability to connect external network cable (not …
Re: Posts photos of your most unique build.
Posted on 2020-08-25, 18:08
That's a really cool case! How did you build it? Thanks :) I used 3mm thick HIPS sheets, 20x30cm in size, sides are made of entire uncut sheets, and I cut top, bottom and front to adequate size. This is done by hand, by cutting the sheet few times and breaking it. I 3D printed ventilation cover and …
Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?
Posted on 2020-08-25, 17:53
Are you considering the VGA to eDP monitor controller because you have an HDMI device that you could use ? If that is the case, one of the small and inexpensive VGA 70Hz to HDMI 60Hz converters mentioned earlier by Prez might work for you (though no guarantees it would not cut or improperly …
Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?
Posted on 2020-08-25, 13:08
I'm just looking for any solution that would allow capturing VGA output of any quality , doesn't matter if it's scaled or not, it just needs to 1) be an complete image, no cropped out parts 2) work with every resolution without the need of manual adjustments 3) not cost 300 USD and be small enough …
Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?
Posted on 2020-08-25, 09:52
Couldn't this (VGA to eDP LCD controller) https://aliexpress.com/item/33061411194.html + DP to HDMI adapter be used?
Re: VGA Capture Thread
Posted on 2020-08-24, 12:22
I have been using VGA2AV (VGA to RCA) converters and USB video capture cards which are not good quality-wise, but they just work. Unfortunately in DOS the screen is being cropped from the left and right side a little bit, so you don't see C:\> but :\> prompt. I get the same result with two different …
Re: Differences between Windows 95 OSR 2.1 and OSR 2.5
Posted on 2020-08-17, 16:13
Dplus browser is great for old Windows PCs. It is OK for downloading files, google search etc. Very lightweight. Generally works with modern websites, but removes a lot of formatting, scripts, etc. https://sourceforge.net/projects/dplus-browse … ses/dplus-0.5b/
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