如果(A)=34H,(R7)=0ABH,执行XCH A, R7;结果(A)=_________H,(R7)=________H
举一反三
- 如果(A)=34H,(R7)=0ABH,执行XCHA,R7;结果(A)=(),(R7)=()。 A: 0ABH, 34H B: 0A4H, 3BH C: 3BH,0A4H D: 34H, 0ABH
- DJNZ为减一判零指令,如DJNZ R7, LOOP,若R7=0,执行后R7结果为?
- 若(A)=85H,(R7)=43H , (Cy)=1,则依次执行指令“ADD A,R7;DA A ”之后,进位位Cy、累加器A、寄存器R7的内容分别是 A: (A)=28H,(R7)=43H , (Cy)=1 B: (A)=85H,(R7)=43H , (Cy)=1 C: (A)=B8H,(R7)=43H , (Cy)=0 D: (A)=28H,(R7)=43H , (Cy)=0
- 若(A)=85H,(R7)=43H , (Cy)=1,则执行指令“ADDC A,R7”之后,进位位Cy、累加器A、寄存器R7的内容分别是 A: (A)=85H,(R7)=43H , (Cy)=1, B: (A)=C8H,(R7)=FFH , (Cy)=1, C: (A)=C9H,(R7)=43H , (Cy)=0 D: (A)=C9H,(R7)=43H , (Cy)=1
- 1 Complete the words. ► h a i r c u t haircut 1 f r _ _ _ e ____ 2 s _ _ s s _ r _ ____ 3 h _ _ r s t _ _ e ____ 4 h _ _ r d _ _ _ r ____ 5 p _ _ t _ n g ____ 6 t _ _ m ____ 7 c _ l _ _ r ____ 8 b l _ w – d r _ ____