It has a standard 5-pin AT connector but I have not tested it with XT machines. I only tested AT PCs, the lowest spec being an 80286-based machine. It could work with XTs, given the age of this keyboard, but I cannot certify this.

This is somewhere in Romania, while exploring lesser known roads. The car is a Pajero 3.2 turbo-diesel, too bad the camera didn't caught the sound as sound recording wasn't activated. From time to time, I get out in the nature for some overlanding fun. Glad to hear about the ISA system. If you're into building things yourself from ground zero, you might take a look on the microelectronics section on my site. Otherwise, I do have a P233MHz MMX ISA system along the 80386DX one. Socket 370 is even better. I guess you can play even the original DeusEx on it, through Windows 98.

Hello, I still have some work to do on it, but it's almost completed. I am facing some issues while reading the transceiver memory data for memory channel saving. I'll keep you updated.

That is the incandescent Maglite with Xenon bulb.

@@teletype68 cool, thanks for letting me know. I have the newer maglite with the LED bulb but still miss my old incandescent one.

@@ragingjaguarknight86 same for me as well. I tend to use the 3D incandescent Maglite every so often. Also the 6D is very good in the woods or evening walks at the mountains. They're good through fog as they have perceptibly lower backscatter.

Count in the late hour when I did the soldering job and... maximum fun! But I had to test my patience and prove that my prototype works, even though I initially made an error while designing the RAMDAC IC package layout. In the end I corrected everything and designed an interposer PCB adapter for the two video cards that I built already.

@@teletype68 That is a impressive job I would have given up and made a new pcb haha. This is a very impressive board you designed, I am amazed at your skill.

Thank you! I forgot to put a link to the project in the description. More pictures are available there.

It is a 80386-based system that I designed from scratch. Here is the CPU card: www.alexandrugroza.ro/microelectronics/system-design/isa-80386dx-sbmc/index.html

Thanks for the tip. Point taken. I don’t really have experience filming things. But I hope I will improve over time. Indeed I have an old camera that doesn’t support an external monitor. And neither does it have a flippable screen.

Hi André, I am using 8 of them with my 80386 for a total of 32 Mb. They work very well. You can use any chips you'd like (60ns, 70ns, 80ns) but for a 386 I doubt you will notice a difference between 60ns and 70ns. The PCB does not need to be altered for faster/slower RAM timings.

@@teletype68 I'm inclined to put a 20 piece order from JLCPCB ... just need to see where to source the RAM chips ... As I'm thinking not only in 386 machines (I have 3 of those) but also 486 machines, that's why I questioned about 60ns... in a 386 might not be relevant, but a 486 might benefit by the use of faster RAM! I have a couple of 486DX2 66 Motherboard that take only 30Pin RAM, but my stash of memory is limited to a few 1MB sticks... And this will make that not a problem! All the best!!!

Hi, I can design what you need but I really don't have the time for now. Maybe early next year I will be able to do it, if you don't find somebody else to help you in the meantime.

@@teletype68 i can wait. in the meantime I will send you some measurements if you dont mind. PM me somehow.

The Gerber files and more details on this projects are available on the site. I have just updated the video description to include a link to the project documentation. However, I don't recommend OSHPark for the PCBs. They can only do 1.6 mm thickness while these SIMMs require 1.2 mm thickness.

@@teletype68 what is the layer squence at JLCPCB?

@@vinczejani you can find the JLCPCB layer configuration .ZIP file on my site as well. In the Gerbers section there are 2 files. One for JLCPCB and one for OSHPark.

I am glad you find this project useful! Have fun with your new MS-DOS PC!

you can find the link for the picture there

@@vinczejani I have just seen it a couple of minutes ago. It looks nice! What computer are you planning to build with it?

@@teletype68 I have a singleboard computer. Intel 386 sx 25 I will use the eprom socket to run xt ide and cf card. I want to keep this computer for myself to play retrogames and run fasttracker :)

@@vinczejani That is what I was thinking when I designed the backplane PCB with an Option ROM socket. I thought people would want to use XT IDE or something similar. It will be a nice computer, for sure. I am using one backplane with a 386DX / 40 MHz and another one with a Pentium MMX / 233 MHz. PS: I like the SULLINS ISA slots. Nice find! Where did you got them from?

@@teletype68 thank you. The ISA slot come from an old but new backplane. I have had it for years but never touched it until I found your backplane.

Thanks for letting me know! I will check the video once you manage to get everything done! Good luck with the card assembly!

I am indeed using this card with the 386DX system as well. But the performance is crippled by the CPU speed in games like Doom (which starts to be playable by replacing the Intel CPU with an AMD part, clocked at 40 MHz). In my opinion, any ET4000/W32i ISA card would measure (almost) identically to my card in MS-DOS benchmarks when using an 80386DX CPU. Maybe some slight differences would be spotted when using software that is accessing the video DRAM using the internal accelerator. At some point I might do a benchmark but only with one video card since I don't have any big expectations to see differences. I paid close attention though, when I designed the RAMDAC section (both schematic and layout). The stability and intensity/purity of the colors this card produces is indeed something that cannot be compared to other cheap video card implementations based on the ET4000/W32i chip.

Thank you! Especially since I designed the schematic and PCB on my own. Indeed it is a powerful chip. Even though it is 30 years old.

Thanks! The design is based on the ET4000/W32i existing chip. Here is the card performing under Windows 98: kzbin.info/www/bejne/h16XaKRpaManmM0

I have updated the description with the link to my project's page.

Hi, no, this is not a kit. It is something that I designed for my own use but finally decided to release the PCB to the public. It is orderable through OSHPark. But the parts you have to source for yourself.

Hello, I designed it myself and constructed it in a DIY fashion. I know there are a lot of backplanes that you can buy but I am into microelectronics and system design. Thus I like building things on my own.

@@teletype68 Do you sell it?

@@IgorArt1363 I don't think it makes sense to sell such board because of the production costs. However I made public the PCB on OSHPark thus anyone can order the bare PCB (but it is not cheap). Then there are the electronic parts that need to be ordered extra and they cost almost as much as the bare PCB. Next, hand soldering 8 16-bit ISA slots takes a lot of time. Unfortunately these DIY projects end up taking a lot of resources, both time and money.

@@teletype68 How do I order your Board from OSHpark? They need Gerber files.

@@IgorArt1363 You can just order them directly as I already uploaded the gerbers there. This is the project link: oshpark.com/shared_projects/EqWy5PAF

Thank you! I like designing x86 hardware and this was a fun project.

Hello, glad you find it useful. Well it actually depends if you find one in good condition. They are of type foam and foil and if the foam is rotted, the typing quality is not that good. But if you find one in a good condition then you might like it. It resembles to a cheap implementation of Topre switches. But with a different actuation force pattern. It's liniar up until almost all the way down. Then it becomes exponential. Hard to describe. I am using mine for a vintage PC. But I would dare to use it daily. I had one from 1993 up until 2000 and I am very used to typing on it.

Hi, unfortunately you cannot do that. Older mainboards that had PCI and ISA slots had an integrated PCI-ISA signalling translator circuit that allowed this ISA compatibility mode. ISA system backplanes are used for another purpose. As they have no logic on them, they are simply an extension to an ISA single board computer that plugs in any of those ISA slots. Hope this helps.

@@teletype68 Thanks for clarifying this. Much appreciated! 😀