[Yeo Kheng Meng] didn’t cheat by simply running MS-DOS on a modern PC, either: he tested the client on a real 1984 vintage IBM 5155 Portable PC. This semi-portable PC/XT model sports a 4.77 MHz ...
Twitter user VirtuallyFun shared their cutting-edge 16 MHz Intel i386 MS-DOS 4 install on the 1987 IBM Personal System/2, which mainly lives on today in its legacy PS/2 peripheral connectors.