A basic understanding of any of the programming languages will help you in understanding the Assembly programming concepts and move fast on the learning track
16 fév 2019 · This information is for the programmer who is coding in assembler language, and who needs to become familiar with the operating system and
29 mai 2019 · programs in assembler language or high-level languages, The SWA contains information about jobs that are currently in the system
5 août 2009 · This chapter presents a discussion of JCL (Job Control Language) as used for jobs run on a modern IBM mainframe running a descendant of the
6 fév 2009 · One of the main issues in learning Assembler Language for the IBM Mainframe Series, such as Purging Jobs from the Hold Queue
A program to break down the operands of an assembler language instruction into its constituent that runs the machine between jobs
As he developed his career, the technical aspects of programming were merely a means to He then learned assembly language and machine code on DEC PDP-11
Assembly language is almost certainly the most difficult kind of computer locomotive-sized nuggets every day (or even every century) most jobs a
options and IPOs, all make up the many reasons why a career in languages in use, and they all serve unique purposes, at General Assembly or our
Assembly language is converted into executable machine code by a utility keyboard, displaying information on screen and performing various other jobs
execute System/370 (mainframe) assembler language programs on a personal C, or even Lotus may be the best choice for some jobs, BAL is the language of
assembly language, high-level language; ○ This operating system executes jobs serially one after another from a batch of jobs submitted for execution
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or this tutorial content contains some errors, please contact us at webmaster@tutorialspoint.comBinary Arithmetic ...................................................................................... 10
Addressing Data in Memory ..................................................................... 11 Assembly Environment Setup ................................................ 13Installing NASM ........................................................................................ 13
Assembly Basic Syntax .......................................................... 15The data Section ...................................................................................... 15
The bss Section ....................................................................................... 15
The text section ........................................................................................ 15
Comments ................................................................................................ 15
Assembly Language Statements .............................................................. 16 Syntax of Assembly Language Statements .............................................. 16 The Hello World Program in Assembly..................................................... 16 Compiling and Linking an Assembly Program in NASM ........................... 17 Assembly Memory Segments ................................................. 18Memory Segments ................................................................................... 18
Assembly Registers ............................................................... 20Processor Registers ................................................................................. 20
Data Registers ......................................................................................... 20
Pointer Registers ...................................................................................... 21
Index Registers ........................................................................................ 21
Control Registers ..................................................................................... 22
Segment Registers ................................................................................... 22
Example: .................................................................................................. 23
Assembly System Calls .......................................................... 24Linux System Calls ................................................................................... 24
Example ................................................................................................... 25
Addressing Modes ................................................................. 27Register Addressing ................................................................................. 27
Immediate Addressing.............................................................................. 27
Direct Memory Addressing ....................................................................... 28Direct-Offset Addressing .......................................................................... 28
Indirect Memory Addressing ..................................................................... 28The MOV Instruction ................................................................................ 28
SYNTAX: .................................................................................................. 28
EXAMPLE: .............................................................................................. 29
Assembly Variables ............................................................... 31 Allocating Storage Space for Initialized Data ........................................... 31 Allocating Storage Space for Uninitialized Data ....................................... 32Multiple Definitions ................................................................................... 32
Multiple Initializations ............................................................................... 33
Assembly Constants .............................................................. 34The EQU Directive ................................................................................... 34
Example: .................................................................................................. 34
The %assign Directive.............................................................................. 35
The %define Directive .............................................................................. 35
Arithmetic Instructions ............................................................ 37SYNTAX: ................................................................................................. 37
EXAMPLE: .............................................................................................. 37
The DEC Instruction ................................................................................. 37
SYNTAX: ................................................................................................. 37
EXAMPLE: .............................................................................................. 37
The ADD and SUB Instructions ................................................................ 38SYNTAX: .................................................................................................. 38
EXAMPLE: ............................................................................................... 38
The MUL/IMUL Instruction ....................................................................... 40SYNTAX: .................................................................................................. 40
EXAMPLE: ............................................................................................... 41
EXAMPLE: .............................................................................................. 41
The DIV/IDIV Instructions ......................................................................... 42
SYNTAX: ................................................................................................. 42
EXAMPLE: .............................................................................................. 43
Logical Instructions ................................................................ 45The AND Instruction ................................................................................. 45
Example: .................................................................................................. 46
The OR Instruction ................................................................................... 46
Example: .................................................................................................. 47
The XOR Instruction ................................................................................. 47
The TEST Instruction ............................................................................... 48
The NOT Instruction ................................................................................. 48
Assembly Conditions.............................................................. 49The CMP Instruction................................................................................. 49
SYNTAX ................................................................................................... 49
EXAMPLE: ............................................................................................... 49
Unconditional Jump .................................................................................. 50
SYNTAX: .................................................................................................. 50
EXAMPLE: ............................................................................................... 50
Conditional Jump ..................................................................................... 50
Example: .................................................................................................. 51
Assembly Loops ..................................................................... 53Example: .................................................................................................. 53
Assembly Numbers ................................................................ 55ASCII Representation............................................................................... 56
BCD Representation ................................................................................ 57
Example: .................................................................................................. 57
Assembly Strings ................................................................... 59String Instructions .................................................................................... 59
MOVS....................................................................................................... 60
LODS ....................................................................................................... 61
CMPS ....................................................................................................... 62
SCAS ....................................................................................................... 63
Repetition Prefixes ................................................................................... 64
Assembly Arrays .................................................................... 65Example: .................................................................................................. 66
Assembly Procedures ............................................................ 67Syntax: ..................................................................................................... 67
Example: .................................................................................................. 67
Stacks Data Structure: ............................................................................. 68
EXAMPLE: .............................................................................................. 69
Assembly Recursion .............................................................. 70 Assembly Macros ................................................................... 72Example: .................................................................................................. 73
Assembly File Management ................................................... 74File Descriptor .......................................................................................... 74
File Pointer ............................................................................................... 74
File Handling System Calls ...................................................................... 74
Opening an Existing File .......................................................................... 75
Reading from a File .................................................................................. 75
Writing to a File ........................................................................................ 76
Closing a File ........................................................................................... 76
Updating a File ......................................................................................... 76
Example: .................................................................................................. 77
Memory Management ............................................................ 79Example: .................................................................................................. 79