[userbinator]

but rather, you can't let the VM manage its own PTEs. virtualbox lets you configure that - just turn off nested paging

The background information for that reason is contained in these two detailed articles:

https://blog.stuffedcow.net/2015/08/pagewalk-coherence/

https://blog.stuffedcow.net/2015/08/win9x-tlb-invalidation-b...

tl;dr: newer AMD processors have non-coherent pagewalks. Intel has maintained coherent pagewalks despite that not being explicitly guaranteed in their documentation. Win9x depends on that.

I will say ME runs fine where 98 doesn't. weird!

Caching/speculative execution related bugs are very sensitive to patterns of memory access.