My 286-class CPU (real-mode only) is finally working in sim and we have PC-AT BIOS, VGA and IBM Basic working.😀 The CPU is written from scratch and uses a 5-stage pipeline, aiming to be fast enough to run early 90's games. The final core will be in between ao486 and PCXT_MiSTer.
Trying to make something new for 8086/8088. Finally there's progress in coverage tests after many hours of work... x86 is such a complicated beast.😅😅