题目内容

In register indirect addressing, only register R0 and R1 are available for use to hold the address of the data. ( )

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

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