Assembler definition in computer

It generates instructions by evaluating the mnemonics (symbols) in operation field and find the value of symbol and literals to produce machine code. Now, if assembler do all this work in one scan then it is called single pass assembler, otherwise if it does in multiple scans then called multiple pass assembler. Here assembler divide these tasks in two passes: • Pass-1: • Define symbols and literals and remember them in symbol table and literal table respectively. • Keep track of location counter • Process pseudo-operations • Pass-2: • Generate object code by converting symbolic op-code into respective numeric op-code • Generate data for literals and look for values of symbols Firstly, We will take a small assembly language program to understand the working in their respective passes. Assembly language statement format: [Label] [Opcode] [operand] Example: M ADD R1, ='3' where, M - Label; ADD - symbolic opcode; R1 - symbolic register operand; (='3') - Literal Assembly Program: Label Op-code operand LC value(Location counter) JOHN START 200 MOVER R1, ='3' 200 MOVEM R1, X 201 L1 MOVER R2, ='2' 202 LTORG 203 X DS 1 204 END 205 Let’s take a look on how this program is working: • START: This instruction starts the execution of program from location 200 and label with START provides name for the program.(JOHN is name for program) • MOVER: It moves the content of literal(=’3′) into register operand R1. • MOVEM: It moves the content of register into memory operand(X). • MOVER: It a...

Assembly languages for IBM System/360 and successor mainframes Basic Assembly Language ( BAL) is the commonly used term for a low-level programming language used on Assemblers on other operating systems for System/360 through General characteristics [ ] The architecture of IBM mainframes has undergone several extensions over the years, including System/360, System/370, System/370 XA, ESA/370, The instruction set consists of the low-level operations supported by the architecture, such as: Instruction Mnemonic Description Load L copy a value from memory to a register Store ST copy a value from a register to memory Compare C compare a register value with a value in memory Shift SLL, SRL move the bits of a register left or right Start subchannel SSCH start a sub-channel I/O operation using a string of channel command words The extreme simplicity of these operations means that the Another reason to use assembler is that not all operating system functions can be accessed in high level languages. The application program interface of mainframe operating systems is defined as a set of assembly language "macro" instructions, that typically invoke Assembler statement format [ ] The format of assembler language statements reflects the layout of an 80-column punched card, though successive versions have relaxed most of the restrictions. • The optional statement label or name is a string alphanumeric characters beginning in column 1. The first character has to be alphabetic. Later versi...

Wiktionary Rate this definition: 0.0 / 0 votes • assembler noun A tool that reads source code written in assembly language and produces executable machine code, possibly together with information needed by linkers, debuggers and other tools. This assembler is much faster than the old one. • assembler noun Assembly language. I wrote that program in assembler. • assembler noun One who assembles items. • assembler noun A nanodevice capable of assembling nanodevices, possibly including copies of itself, according to a plan. Examples of Assembler in a Sentence • This document describes the usage and input syntax of the Unix Vax-11 assembler As. As is designed for assembling code produced by the "C" compiler; certain concessions have been made to handle code written directly by people, but in general little sympathy has been extended. • - Select - • 简体中文 (Chinese - Simplified) • 繁體中文 (Chinese - Traditional) • Español (Spanish) • Esperanto (Esperanto) • 日本語 (Japanese) • Português (Portuguese) • Deutsch (German) • العربية (Arabic) • Français (French) • Русский (Russian) • ಕನ್ನಡ (Kannada) • 한국어 (Korean) • עברית (Hebrew) • Gaeilge (Irish) • Українська (Ukrainian) • اردو (Urdu) • Magyar (Hungarian) • मानक हिन्दी (Hindi) • Indonesia (Indonesian) • Italiano (Italian) • தமிழ் (Tamil) • Türkçe (Turkish) • తెలుగు (Telugu) • ภาษาไทย (Thai) • Tiếng Việt (Vietnamese) • Čeština (Czech) • Polski (Polish) • Bahasa Indonesia (Indonesian) • Românește (Romanian) • Nederlands (Dutch) • Ελληνικά (Gr...

Recent Examples on the Web Foxconn—best known as the assembler of the iPhone, but with zero automaking experience—is backing away from a plan to build the Endurance pickup at a former GM plant in Ohio. — IEEE Spectrum, 2 June 2023 Curry got his start with the UAW in 1992, when he was hired as a truck assembler at Freightliner Trucks in Mount Holly, North Carolina, according to the union. — Eric D. Lawrence, Detroit Free Press, 25 Mar. 2023 The Romanian automaker was founded under communism as an assembler of Renaults built under license, and after the Cold War ended the French automaker absorbed it. — Mike Duff, Car and Driver, 26 May 2023 Saudi Arabia’s sovereign-wealth fund is partnering with the biggest assembler of Apple Inc. AAPL -4.25% iPhones to manufactur electric vehicles, part of an effort to create an industrial sector that Crown Prince Mohammed bin Salman hopes can diversify his economy away from oil. — Rory Jones, WSJ, 3 Nov. 2022 Foxconn, the world’s largest contract assembler of consumer electronics, is in talks with Saudi officials about the prospect of opening a $9 billion factory in the Middle Eastern nation that wants to diversify its economy away from oil, the Wall Street Journal reported this week. — Ralph Jennings, Forbes, 17 Mar. 2022 Curry, the former secretary-treasurer of the union, a truck assembler and military veteran, took the helm in June 2021 after Rory Gamble retired. — Phoebe Wall Howard, Detroit Free Press, 17 Mar. 2022 Covid-19 outbreaks...

• العربية • Asturianu • Azərbaycanca • বাংলা • Беларуская • Беларуская (тарашкевіца) • Български • Bosanski • Català • Čeština • Dansk • Deutsch • Eesti • Ελληνικά • English • Español • Esperanto • Euskara • فارسی • Français • Gaeilge • Galego • 한국어 • Հայերեն • हिन्दी • Hrvatski • Ido • Bahasa Indonesia • Íslenska • Italiano • עברית • ქართული • Қазақша • Kurdî • Latina • Latviešu • Lietuvių • Lombard • Magyar • മലയാളം • Bahasa Melayu • Mirandés • Монгол • Nederlands • 日本語 • Norsk bokmål • Oʻzbekcha / ўзбекча • ਪੰਜਾਬੀ • Português • Română • Русский • Scots • Shqip • සිංහල • Slovenčina • Slovenščina • Српски / srpski • Srpskohrvatski / српскохрватски • Suomi • Svenska • ไทย • Тоҷикӣ • Türkçe • Українська • اردو • Tiếng Việt • 吴语 • 粵語 • 中文 An assembly language is a Programs written in assembly language are usually made of instructions, which are small tasks that the computer performs when it is running the program. They are called instructions because the programmer uses them to instruct the computer what to do. The part of the computer that follows the instructions is the The assembly language of a computer is a low-level language, which means that it can only be used to do the simple tasks that a computer can understand directly. In order to perform more complex tasks, one must tell the computer each of the simple tasks that are part of the complex task. For example, a computer does not understand how to print a sentence on its screen. Instead, a program written in assembly...

ICT (Information and Communications Technology) is the use of computing and telecommunication technologies, systems and tools to facilitate the way information is created, collected, processed, transmitted and stored. It includes computing technologies like servers, computers, software applications and database management systems (DBMSs)... • • Trending Terms What Does Assembly Language Mean? An assembly language is a low-level programming language for microprocessors and other programmable devices. It is not just a single language, but rather a group of languages. An assembly language implements a symbolic representation of the machine code needed to program a given CPU architecture. Assembly language is also known as assembly code. The term is often also used synonymously with 2GL. Techopedia Explains Assembly Language An assembly language is the most basic programming language available for any processor. With assembly language, a programmer works only with operations that are implemented directly on the physical CPU. Assembly languages generally lack high-level conveniences such as variables and functions, and they are not portable between various families of processors. They have the same structures and set of commands as machine language, but allow a programmer to use names instead of numbers. This language is still useful for programmers when speed is necessary or when they need to carry out an operation that is not possible in high-level languages. Techopedia™ is y...

Wiktionary Rate this definition: 0.0 / 0 votes • assembler noun A tool that reads source code written in assembly language and produces executable machine code, possibly together with information needed by linkers, debuggers and other tools. This assembler is much faster than the old one. • assembler noun Assembly language. I wrote that program in assembler. • assembler noun One who assembles items. • assembler noun A nanodevice capable of assembling nanodevices, possibly including copies of itself, according to a plan. Examples of Assembler in a Sentence • This document describes the usage and input syntax of the Unix Vax-11 assembler As. As is designed for assembling code produced by the "C" compiler; certain concessions have been made to handle code written directly by people, but in general little sympathy has been extended. • - Select - • 简体中文 (Chinese - Simplified) • 繁體中文 (Chinese - Traditional) • Español (Spanish) • Esperanto (Esperanto) • 日本語 (Japanese) • Português (Portuguese) • Deutsch (German) • العربية (Arabic) • Français (French) • Русский (Russian) • ಕನ್ನಡ (Kannada) • 한국어 (Korean) • עברית (Hebrew) • Gaeilge (Irish) • Українська (Ukrainian) • اردو (Urdu) • Magyar (Hungarian) • मानक हिन्दी (Hindi) • Indonesia (Indonesian) • Italiano (Italian) • தமிழ் (Tamil) • Türkçe (Turkish) • తెలుగు (Telugu) • ภาษาไทย (Thai) • Tiếng Việt (Vietnamese) • Čeština (Czech) • Polski (Polish) • Bahasa Indonesia (Indonesian) • Românește (Romanian) • Nederlands (Dutch) • Ελληνικά (Gr...

Assembly languages for IBM System/360 and successor mainframes Basic Assembly Language ( BAL) is the commonly used term for a low-level programming language used on Assemblers on other operating systems for System/360 through General characteristics [ ] The architecture of IBM mainframes has undergone several extensions over the years, including System/360, System/370, System/370 XA, ESA/370, The instruction set consists of the low-level operations supported by the architecture, such as: Instruction Mnemonic Description Load L copy a value from memory to a register Store ST copy a value from a register to memory Compare C compare a register value with a value in memory Shift SLL, SRL move the bits of a register left or right Start subchannel SSCH start a sub-channel I/O operation using a string of channel command words The extreme simplicity of these operations means that the Another reason to use assembler is that not all operating system functions can be accessed in high level languages. The application program interface of mainframe operating systems is defined as a set of assembly language "macro" instructions, that typically invoke Assembler statement format [ ] The format of assembler language statements reflects the layout of an 80-column punched card, though successive versions have relaxed most of the restrictions. • The optional statement label or name is a string alphanumeric characters beginning in column 1. The first character has to be alphabetic. Later versi...

ICT (Information and Communications Technology) is the use of computing and telecommunication technologies, systems and tools to facilitate the way information is created, collected, processed, transmitted and stored. It includes computing technologies like servers, computers, software applications and database management systems (DBMSs)... • • Trending Terms What Does Assembly Language Mean? An assembly language is a low-level programming language for microprocessors and other programmable devices. It is not just a single language, but rather a group of languages. An assembly language implements a symbolic representation of the machine code needed to program a given CPU architecture. Assembly language is also known as assembly code. The term is often also used synonymously with 2GL. Techopedia Explains Assembly Language An assembly language is the most basic programming language available for any processor. With assembly language, a programmer works only with operations that are implemented directly on the physical CPU. Assembly languages generally lack high-level conveniences such as variables and functions, and they are not portable between various families of processors. They have the same structures and set of commands as machine language, but allow a programmer to use names instead of numbers. This language is still useful for programmers when speed is necessary or when they need to carry out an operation that is not possible in high-level languages. Techopedia™ is y...

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