a) What are Assembler Directives? Explain the following directives wi…

Question

a) What are Assembler Directives? Explain the following directives with an example for each: (10)

i) ASSUME

ii) PUBLIC and EXTERN

iii) GLOBAL

iv) ALIGN16

b) Define any four addressing modes used in 8086 microprocessor. Identify addressing modes used in each of the following 8086 instructions. (10)

i) MOV BX, 0354H

ii) ADD AL, [BX+04]

iii) MOV AX, [BX+SI]

iv) MOV AX, [BX+SI+04]