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Floating Point Coprocessors
Part 1 of Paper ....s limited by the quantity of silicon available (not
to mention the problems of testability and complexity). Consequently, a real
microprocessor represents a compromise between what is desirable and what is
acceptable to the majority of the chip's users. For example, the 68020
microprocessor is not optimized for calcula.... Part 2 of Paper ....th an
instruction interpreter and program counter. Each instruction fetched from
memory is examined by both the MPU and the coprocessor. If it is a MPU
instruction, the MPU executes it; otherwise the coprocessor executes it. It can
be seen that this solution is feasible, but by no means simple, as it would be
difficult to keep the MPU and coprocessor in step. Another technique is to equip
the microprocessor with a special bus to communicate with the external
coprocessor. Whenever the microproces.... |
Number of words: 2861 - Approximate pages: 11 |
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