Re: ATX PSU Latching Circuit PCB for Momentary Switch
Posted on 2023-05-31, 15:36
Thanks for sharing these. I ordered a set from OSHPark, and will post my experience when I try them. - Alex
Re: USB to Serial Mouse using the Pi Pico!
Posted on 2023-04-27, 21:15
Definitely interesting. Thanks Calamity and Darmok! - Alex
Re: Informal poll on anecdotal failures of blank floppy media, specifically for documents needed for school or work
Posted on 2023-03-17, 03:39
I had lots of 3.5" 2MB floppies fail, brand new, because I used to buy super cheap white box floppies. It was all I could afford, at the time. - Alex
Re: Windows 98SE is running on Intel 9th gen platform (bare metal)
Posted on 2023-03-14, 23:55
Re: BIOS Password on Zenith Z-LS/20
Posted on 2023-03-01, 04:36
Here's what the board looks like: Filename IMG_0066.jpeg File size 679.16 KiB Views 140 views Filename IMG_0062.jpeg File size 1.04 MiB Views 140 views Filename IMG_0065.jpeg File size 1.75 MiB Views 140 views - Alex
Re: BIOS Password on Zenith Z-LS/20
Posted on 2023-03-01, 04:08
I finally managed to dump the BIOS for this machine. I'm not sure why I didn't get notified of your response @jakethompson. I uploaded it to archive.org: https://archive.org/details/zenith-z-ls-20-bios And, attached it here, as well. Thanks! - Alex
Re: Dell Ultrasharp 2001FP = Perfect LCD for retro PCs. How can I keep it alive and healthy?
Posted on 2023-02-23, 01:13
My HP 2065 has a _very_ annoying firmware bug where standard DOS text modes are copped, top and bottom. It’s a great panel, but this really limits its use to non-DOS equipment that doesn’t use 80x24 text mode. I’ve wanted to fix that issue since I got the monitor, but there’s no obvious way. I’ve …
Re: DosBox BootfloppyDisk
Posted on 2022-12-26, 16:50
Thanks for this work, Dave! Anything that makes DOSbox easier to use is a service to the community. - Alex
Re: Retro Styled Modular IPS Display for old and new systems
Posted on 2022-12-16, 21:53
The speakers are definitely not the simple cardboard PC speaker modules. The ones chosen appear to be at least decent. As to why speakers at all, keep in mind that this is meant to be an 80s CRT analogue device. Monitors of the time often had at least a mono speaker in the chassis. - Alex
Re: Old at case
Posted on 2022-12-16, 01:19
Looks like it might be AT compatible, though. You’d just need an ATX I/O shield with only an AT keyboard connector cutout. This has been discussed before, and you can 3D print this: https://www.vogons.org/viewtopic.php?p=734921#p734921 One option would be to get something like this and cut a hole: …
Re: 286 USIT Athena PC
Posted on 2022-12-14, 16:13
That's a really neat looking 286. And yeah, reminds me a ton of a PS/2 Model 30 286. I've heard the USIT name, but know nothing about them, unfortunately. - Alex
Re: Zeos motherboard project
Posted on 2022-12-01, 04:11
It's interesting that there is a second socket silkscreened on the board. I assume that this entry is your board? https://theretroweb.com/motherboards/s/zeos-coral-max It's quite a nice second generation P5 board. - Alex
Re: USB to Serial Mouse using the Pi Pico!
Posted on 2022-11-26, 01:37
Thanks for the really cool project, Lime. Seems like it would be very useful for vintage troubleshooting using modern combo USB keyboard/trackpoint devices. - Alex
Re: Retro Styled Modular IPS Display for old and new systems
Posted on 2022-11-24, 21:30
I’d be willing to bet that 70 Hz is supported, as I have seen very few LCD controllers that don’t support that. - Alex
Re: I made a miniature IBM PC
Posted on 2022-11-23, 04:00
I haven’t seen any updates from the OP. - Alex
Re: Odd 386DX + 287 or 387 Board POST Issues
Posted on 2022-11-14, 12:40
Yes, yes it does! When I first found the board, I thougt that someone had just jammed a 287 into the 387 socket. - Alex
Odd 386DX + 287 or 387 Board POST Issues
Posted on 2022-11-14, 09:23
I recently picked up this really cool Chips & Technologies 386DX board, which supports both 80287 and 80387. The interesting thing about it is that the two sockets are combined into one really weird amalgam: 1ECC7DE1-1269-4232-BF21-B35EFB68160A.jpeg I still need to image the BIOS chips from the …
Re: ATX to AT pico Adapter! + Fan Headers, -5v, and 3.3v (Released)
Posted on 2022-11-07, 02:16
So, all 5 units work fine, of course, after fixing the polarity. What is everyone doing who is using these boards in ATX cases? I'm building a Socket 5 Pentium into a modern glass ATX case, and of course the power switch is momentary, and not easy to replace. I'm looking through all the past …
Re: ATX to AT pico Adapter! + Fan Headers, -5v, and 3.3v (Released)
Posted on 2022-11-05, 16:31
Ohhhhh! That explains it. That didn’t occur to me, -at all-. I generally assemble with my multimeter, and the negative voltages led me astray! Here is my solution to the P8/P9 AT connector problem: IMG_0207.jpeg I used the AT connectors from one of the cheap-o no-negative rail ATX to AT adapters. If …
Re: ATX to AT pico Adapter! + Fan Headers, -5v, and 3.3v (Released)
Posted on 2022-11-05, 04:34
I have had the same polarity issue on mine. After running for a while, the c1 capacitor smokes, which is odd, since I verified that the pads next to the edge of the PCB are grounded. I’m using PCB v0.4, as previously mentioned. Sorry it took me so long to actually test! The adapters work just fine …
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