MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -CX is used as a default counter in case of string and loop instructions. The loop instruction is executed based on the value in the CX register.

Detailed explanation-2: -➢ The register CX is used default counter in case of string and loop instructions.

Detailed explanation-3: -The LOOP instruction assumes that the ECX register contains the loop count. When the loop instruction is executed, the ECX register is decremented and the control jumps to the target label, until the ECX register value, i.e., the counter reaches the value zero.

Detailed explanation-4: -The Loop instructions use the CX register to indicate the loop count.

Detailed explanation-5: -AX register is used as 16-bit accumulator. BX register is used as offset storage for forming physical addresses in case of certain addressing modes. CX register is used as a default counter in case of string and loop instructions.