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Old 02 December 2015, 00:49   #42
matthey
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Join Date: Jan 2010
Location: Kansas
Posts: 1,284
Quote:
Originally Posted by gulliver View Post
2.Current FPGA developments target 68020 and not the 68030 instruction set.
The 68020 and 68030 have practically the same integer ISA.

68020
o many new instructions and addressing modes
o instruction cache added

68030
o data cache added
o MMU added
o CALLM/RTM instructions dropped (no known use on Amiga)

68040
o larger caches
o MMU changed significantly
o FPU (compatible with 6888x using traps, new FPU instructions added)
o MOVE16 instruction added

68060
o larger caches
o MMU changes are minor
o FPU changes are minor (FINT/FINTRZ added back)
o MOVEP, CMP2, CHK2, CAS2 instructions trapped
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