3 ms·
> It's my understanding that the Motorola 68000 still has some outstanding emulation problems (related to the instruction cache), due to using HMOS logic. This
by wk_end 6y ago
> It's my understanding that the Motorola 68000 still has some outstanding emulation problems (related to the instruction cache), due to using HMOS logic.
This doesn't sound right to me. For one thing, the idea that you need to simulate analog effects in order to properly emulate an instruction cache sort of flies in the face of my (admittedly amateur) understanding of reasonable chip design. For another, that'd imply that the CMOS versions of the 68K function differently than the HMOS ones, and I can't find any indication of that. Finally, as far as I know the 68000 doesn't have an instruction cache!
- krallja 6y agoI also don’t think the 68000 had an instruction cache. The 68010 added a “loop mode” which was effectively a 2-entry instruction cache.