A certain microprocessor has a simple instruction set shown below. INSTRUCTION S

Question

A certain microprocessor has a simple instruction set shown below.

INSTRUCTION SET

Op-code ---------- Explanation
76 ------------------ Halt the microprocessor.
C6* ---------------- Add next byte to accumulator.
D6* ---------------- Subract next byte from accumulator.
3C ----------------- Increment the accumulator.
3D ----------------- Decrement the accumulator.
3E* ---------------- Move the next byte into the accumulator.

*These instructions use two bytes.

What number would be in the accumulator after the program shown below was run?

PROGRAM

Address ---------- Op-code

001 ---------------- 3E

002 ---------------- 05

003 ---------------- D6

004 ---------------- 02

005 ---------------- 3C

006 ---------------- 76

Explanation / Answer

((05 - 02)++) = 04 will be in the accumulator

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