题目内容

CPU要实现数据11000000B和数据10000000B相加,当前PSW中OV位和CY位都为0,则计算结束后,OV位和CY位分别为()和()。()

A. 0, 0
B. 0, 1
C. 1, 0
D. 1, 1

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CPU要实现数据01000000B和数据01000000B相加,当前PSW中OV位和CY位都为0,则计算结束后,OV位和CY位分别为()和()。()

A. 0, 0
B. 0, 1
C. 1, 0
D. 1, 1

CPU要实现数据00100000B和数据00110000B相加,当前PSW中OV位和CY位都为0,则计算结束后,OV位和CY位分别为()和()。()

A. 0, 0
B. 0, 1
C. 1, 0
D. 1, 1

If Timer 1 of 8051 counts in mode 2, after executing the instruction “MOV TL1, #0FEH”, it will generate the overflow after counting ______ numbers.

Memory address H in the interrupt vector table is assigned to serial port, and the memory address H is assigned to external interrupt 1.