已知:A=DBH R4=73H CY=1,指令:SUBB A, R4 执行后的结果是()。A.A=73HB.A=DBHC.A=67HD.以上都不对
已知:A=DBH R4=73H CY=1,指令:SUBB A, R4 执行后的结果是()。
A.A=73H
B.A=DBH
C.A=67H
D.以上都不对
参考答案和解析
D
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