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Motorola 68010 A microprocessor from Motorola. It was the successor to the Motorola 68000 and was followed by the Motorola 68020. Some instructions which were previously {user mode} were made {system mode}, which necessitated patches to a few programs. The 68010's main advantage over the 68000 was that it could recover from a {bus fault}. The 68000 microcode didn't save enough state to restart all instructions; the 68010 corrected this fault. This allowed it to use {paged virtual memory}. The 68010's DBxx (decrement and branch) instructions could hold and execute the preceding instruction in the {prefetch buffer}, allowing some two-instruction loops to execute without refetching instructions. At one time there was a 68010 variant that was pin-for-pin compatible with the 68000. Early Amiga hackers replaced their 68000s with 68010s in order to get a small performance increase. (1995-11-29)
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