Question 1 why cannot the 68000 be single-stepped through, Ask an Expert

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Question: 1. Why cannot the 68000 be single-stepped through instructions simply by halting its clock after AS* has been negated at the end of a memory access?

2. Design a circuit to permit a single bus cycle at a time to be executed. The HALT* line must normally be held in its active-low state and be negated long enough for the 68000 to execute a single bus cycle.

3. Unlike other byte-addressable microprocessors that employ an A 0 0 pin as a least significant bit to distinguish between an odd and even byte, the 68000 does not connect A00 from an address register (or the program counter) to a pin. How then does the 68000 implement byte accesses?

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Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M92339800

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