如A=57H,(R0)=30H,(30H)=0DAH执行指令XCHD A,@R0后,(A)=___________、(R0)=_____________、(30H)=_______________
举一反三
- 如果(A)=5CH,(R0)=30H,(30H)=7AH,执行XCHD A, @R0;结果(A)=_______H,((R0))=_______H。
- 指令 MOV R0,20H 执行前 (R0)=30H, (20H)=38H,执行后(R0)=?
- 假设(30H)=60H,(60H)=55H,则执行下列指令后,(A)=H,MOV R0,30HMOV A,@R0
- 执行如下三条指令后,30H单元的内容是( ) A: 、0 B: H C: H D、F D: H E: O F: O G: O H: R1,#30H I: 40H,#0 J: @R1,40H <br/>A、40H B、30H
- 指令MOVR0,#20H执行前(R)=30H,(20H)=38H,执行后() A: (R0)=00H B: (R0)=20H C: (R0)=30H D: (R0)=38H