题目内容

8051 does not provide the instruction for subtraction without borrow. ( )

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PUSH and POP instructions only support direct addressing mode. ( )

The instruction INC A does not affect the P flag in PSW register. ( )

What should be the values of RS1 and RS0 bits of PSW SFR to select register bank #2? ( )

A. 1 and 0
B. 1 and 1
C. 0 and 0
D. 0 and 1

Which register bank is selected by default after system reset? ( )

A. bank 0
B. bank 1
C. bank 2
D. bank 3