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9.16 a. How many trap service routines can be implemented in the LC-3? Why? b. Why must a RET instruction be used to return from a TRAP routine? Why won’t a BR (Unconditional Branch) instruction work instead? c. How many accesses to memory are made during the processing of a TRAP instruction? Assume the TRAP is already in the IR.

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9.16 a. How many trap service routines can be implemented in the LC-3? Why? b. Why must a RET instru...
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