( A )=0A7H,(R5)=68H, Cy =1，执行指令 SUBB A ,R5后 ( A )=［填空1] Cy =［填空2] Ac =［填空3] OV =［填空4] P =［填空5] 首先A不等于9FH

( A )=FFH, Cy =1, Ac =0, OV =0, P =1

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