Assembler directives :-

Assembler directives are the directions to the assembler which indicate how an operand or section of the program is to be processed. These are also called pseudo operations which are not executable by the microprocessor. The following section explains the basic assembler directives for 8086.

It control the organization if the program and provide necessary information to the assembler to understand the assembly language programs to generate necessary machine codes. They indicate how an operand or a section of the program is to be processed by the assembler.

Assembler Directives of the 8086 Microprocessor :-

(a) The DB directive

(b) The DW directive

(c) The DD directive

(d) The STRUCT (or STRUC) and ENDS directives (counted as one)

(e)The EQU Directive

(f)The COMMENT directive

(g)ASSUME

(h) EXTERN

(i) GLOBAL

(j) SEGMENT

(k)OFFSET

(l) PROC

(m)GROUP

(n) INCLUDE

For detailed explanation, please refer to Short notes on assembler directives