dionb wrote on 2021-12-21, 10:57:
Later PC98 systems were basically just x86 Pentium machines anyway.
Yes and not. Them still have the non-standard memory/interrupt/io PC98 magic, and its chipset is a NEC custom one which has support for CBus cards in addition to the Intel Northbridge bundled PCI controller (don't confuse with Corollary C-Bus server bus). These Pentium PC98's still need special bus VxD drivers which only come with Win9x PC98 editions... Or an special HAL in case of WinNT based OSs.
Is similar to the first SGIs based in x86 architecture. The only x86 there was the CPU... The chipset was a custom strange thing... And the firmware was microsoft/SGI ARCS, which had nothing to do with standard x86 bioses.
Talking from the experience of dealing with these in ReactOS.