Ch 08: String Instructions and Primitives

By default, the Code Segment (CS) register is implicitly associated with which offset register to form logical memory addresses for instruction execution?

In which bit rotation operation does every bit move one position to the right, with the bit dropped from the rightmost position (LSB) inserted into the leftmost position (MSB) and also copied into the Carry Flag?

ror ax, 1

Which bit shift operation shifts every bit one position to the right while replicating the original Most Significant Bit (sign bit) at the MSB position and catching the bit dropped from the right in the Carry Flag?

sar ax, 1

Which one of the following instructions is illegal in 8088 assembly language?

MOV AX, [BX + BP]

In 8088 processor architecture, the CX register is primarily designated and used as a:

mov cx, 10
loop label_name

Regarding signal transmission direction between the processor and peripheral devices, the System Data Bus is:

Which instruction is effectively equivalent to multiplying the value in register AX by 8?

shl ax, 3

When a 32-bit dividend is divided by a 16-bit divisor in 8088 assembly language ('DIV reg16'), what is the bit width of the remainder stored in register DX?

div bx

________ allow changing specific processor flags and system control behaviors directly.

cld
cli

In the instruction 'CMP AX, BX', the contents of which register are modified?

cmp ax, bx