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+ Some off-the-cuff thoughts on the 8-bit CPUs.

Thomas Harte 2020-12-23 00:28:02 -04:00
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Roadmap-for-Flexibly-Timed-Platforms.md

@ -49,4 +49,11 @@ What to include in the template signature will be a question of measure and degr
3. build the JIT threaded-code generator and deploy it coupled to the 68k decoder to provide flexibly-timed 68020, 68030 and 68040s;
4. use those to build out the higher-function pre-PowerPC Macintoshes.
With a workable pattern suitably discovered, apply the same to other architectures.
With a workable pattern suitably discovered, apply the same to other architectures.
## Z80 and 6502 Notes
Both the Z80 and 6502 both almost have instruction decoders themselves, in the form of the disassemblers. It would probably make sense to formalise those; it also wouldn't necessarily be unproductive:
* in 6502 world, it would simplify the logic flow for instruction set selection between the 6502, various 65C02s and possibly the 65816; and
* for the purposes of the Z80, it might aid in unification of CLK and CP/M for OS X.