The idea to make an adapter board is neat, but a bit over-engineered and probably still quite expensive for the purpose. Well, the actual part costs are neglible (i.e. ATX socket plug is ~0,3€ etc), the only bigger cost is the PCB and it will range down to ~4€ per board with 20-30 copies and drop …

Well that's the only problem, we need to find out how many are 😀

I'm a DOS game enthusiast myself, grew up with IBM PS/2 and still fancy many DOS games over newer releases. Although Dosbox is awesome I prefer genuine hardware whenever I can. I have a big collection of AT hardware in various phases of decay, and a big problem with old hardware has been its …