Assembler directives are
instructions that direct the assembler to do something
. … This is used to set the program or register address during assembly. For example, ORG 0100h tells the assembler to assemble all subsequent code starting at address 0100h. DS. Defines an amount of free space.
What are assembler directives explain 4 assembler directives in detail?
Assembler directives
supply data to the program and control the assembly process
. Assembler directives enable you to do the following: Assemble code and data into specified sections. Reserve space in memory for uninitialized variables. Control the appearance of listings.
What are assembler directives explain with example?
Directives are instructions used by the assembler to help automate the assembly process and to improve program readability. Examples of common assembler directives are
ORG (origin), EQU (equate), and DS
. B (define space for a byte).
What is assembler example?
An assembler converts the assembly level language code into the machine level language code. The input of a compiler is high-level language source code. … compilers. Examples of assemblers are
GAS, GNU etc
.
What are assembler directives in microprocessor?
An assembler directive is
a statement to give direction to the assembler to perform task of the assembly process
. … They indicate how an operand or a section of the program is to be processed by the assembler. An assembler supports directives to define data, to organise segments to control procedure, to define macros.
What do you mean by assembler directive write all assembler directives with their meanings?
Assembler directives- These are the
statements that direct the assembler to do something
. As the name says, it directs the assembler to do a task. The specialty of these statements is that they are effective only during the assembly of a program but they do not generate any code that is machine executable.
What is the purpose of the origin directive?
The origin directive tells
the assembler where to load instructions and data into memory
. It changes the program counter to the value specified by the expression in the operand field. Subsequent statements are assembled into memory locations starting with the new program/location counter value.
What do you mean by assembler directive?
Assembler directives are
directions to the assembler to take some action or change a setting
. Assembler directives do not represent instructions, and are not translated into machine code. … data directive tells the assembler that information that follows is program data.
What is the function of EQU assembler directive?
In assembly code, the assembler directive EQU is
used to assign a label to a number
, which can be a literal, a file register number or an individual register bit.
Which assembler directive is used in FAR procedure?
The
PROC directive
is used to identify the start of a procedure. The PROC directive follows a name you give the procedure. After the PROC directive, the term near or the term far is used to specify the type of the procedure.
What is an example of an interpreter?
An Interpreter directly executes instructions written in a programming or scripting language without previously converting them to an object code or machine code. Examples of interpreted languages are
Perl, Python and Matlab
. … For interpreted programs, the source code is needed to run the program every time.
What is assembler in simple language?
An assembler is
a program that takes basic computer instructions and converts them into a pattern of bits
that the computer’s processor can use to perform its basic operations. Some people call these instructions assembler language and others use the term assembly language.
How many types of assemblers are there?
There are
two types
of assemblers based on how many passes through the source are needed (how many times the assembler reads the source) to produce the object file. One-pass assemblers go through the source code once.
What is difference between macro and procedure?
A macro is used for a small number of instructions; mostly, less than ten instructions, while
a procedure is used for a large number of instructions; mostly, higher than ten instructions
. Hence, this is the main difference between macro and procedure.
How do you use assembler directives?
Assembler directives are instructions that
direct the assembler to do something
. Assigns a value to a symbol (same as =) Sets the current origin to a new value. This is used to set the program or register address during assembly.
Which directive ends a procedure?
The ENDP directive
marks the end of the main procedure.
