On Tue, 23 Feb 2021 14:08:01 +0000, Steve Walker wrote:

Our first PC used an odd processor, the NEC V20 - which was pin and code
compatible with the 8088, but had extra instruction matching the 80186
and internal differences meant that it could sometimes do more per clock
cycle than the 8088.

I had several PCs, and I switched all of them (V20 for 8088, V30 for
8086).

I also fitted turbo switches!

It also could be switched in code to emulate an 8080 (so could run the
existing CPM-80 and applications, not that we ever did) and could run
mixed 8080 and 8086 code.

Yes, I liked the idea but never used it in the end.



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