3 ms·
> The 8088/8086 had a MMU that provided only addressing space extension, from 16-bit to 20-bit. In hardware this is literally an add. Calling a single add (wit
by danachow 5y ago
> The 8088/8086 had a MMU that provided only addressing space extension, from 16-bit to 20-bit.
In hardware this is literally an add. Calling a single add (with aliasing) an MMU is quite a reach. The 80286 is not merely an extension on this as the segment registers actually do indirection. Also in terms of silicon real-estate I think you greatly underestimate the complexity of what you call the “easy” part - anything that can fault is no longer trivial for one - the 8088 cannot do this.