from
The Free On-line Dictionary of Computing (8 July 2008)
Motorola 68010
MC68010
<processor> 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)