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Topic: Assembly language


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  Assembly language - Wikipedia, the free encyclopedia
Assembly language, commonly called assembly, asm or symbolic machine code, is a human-readable notation for the machine language that a specific computer architecture uses.
In particular, assembly is often used in writing the low level interaction between the operating system and the hardware, for instance in device drivers.
Assembly language is also valuable in reverse engineering, since many programs are distributed only in machine code form, and machine code is usually easy to translate into assembly language and carefully examine in this form, but very difficult to translate into a higher-level language.
en.wikipedia.org /wiki/Assembly_language   (1499 words)

  
 Programming:Assembly - Wikibooks, collection of open-content textbooks
Assembly does not provide the abstraction level of such languages; basically it is a one-to-one mapping of the bare machine code instructions to so-called mnemonics.
Unfortunately, assembly language cannot be presented to you as a table of commands and a paragraph of instruction on how these commands are written.
Randall Hyde's High Level Assembly (HLA) is considered a good tool by some for learning assembly language for those who are already skilled in a high-level programming language, such as C or C++.
en.wikibooks.org /wiki/Programming:Assembly   (487 words)

  
 Assembly Language
Assembly languages are still used in some time-critical programs since they give the programmer very precise control of what exactly happens inside the computer.
Assembly languages still require that the programmer should have a good knowledge of the internal structure of the computer.
Assembly languages are still machine specific and hence the program will have to be re-written if it is to be implemented on another type of computer.
www.cee.hw.ac.uk /~pjbk/pathways/cpp1/node21.html   (328 words)

  
 Jeff Duntemann's Assembly Language Books and Links
In assembly language, if you know where your operands are, you're three quarters of the way to anywhere else you might want to be.
Macros are a mechanism allowing code re-use in assembly work, and they foster a philosophy of "define once, use everywhere" that gives you the programmer another defense against both duplication of effort and the bugs that come of writing the same sequence of assembly instructions over and over again, which is dumb.
Assembly language is also discussed in newsgroups with more specific focus, like game programming or virus technology, and there are some interesting things in alt.hacker.
www.duntemann.com /assembly.htm   (5264 words)

  
 Introduction to Assembly Language   (Site not responding. Last check: 2007-10-21)
Assembly languages are close to a one to one correspondence between symbolic instructions and executable machine codes.
Programs written in high level languages (especially object oriented programming languages) are much easier and less expensive to maintain than similar programs written in assembly language (and for a successful software project, the vast majority of the work and expense is in maintenance, not initial development).
Another is that assembly languages generally have a feature, called macros, that frees the [programmer] from having to repeat similar sections of code used in several places in a program.
www.osdata.com /topic/language/asm/asmintro.htm   (2337 words)

  
 Assembly Language Techniques for the Solaris OS, x86 Platform Edition
The "Assembly Functions for C Applications" section is key to understanding how to integrate assembly language snippets in your C code so you can make use of function parameters and any local variables that have been established.
Assembly language shouldn't be the first answer when the performance of an application must be improved.
My assembly language function is still cleanly beating its C counterparts for the larger copies, but look at the smaller ones.
developers.sun.com /solaris/articles/x86_assembly_lang.html   (5384 words)

  
 Art of Assembly Language:Forward
They refuse to use assembly because it is not portable, and then they turn around and write equally non-portable programs in C. Yes, there are lots of lies, misconceptions, myths, and half-truths concerning assembly language.
While certain programs may not benefit much from implementation in assembly, you can speed up many programs by a factor of five or ten over their HLL counterparts by careful coding in assembly language; even greater improvement is possible if you're not using an optimizing compiler.
While the typical college student won't have much need for assembly language during the four years as an undergraduate, the machine organization portion of the class is useful in several upper division classes.
maven.smith.edu /~thiebaut/ArtOfAssembly/fwd/fwd.html#61   (4052 words)

  
 The Old Joel on Software Forum - Assembly language
I dont regret learning assembly though, and I have been doing some stuff in my spare time in assembly, but since you say you have to prioritize your learning efforts I would not learn assembly language if I was in your shoes.
I thought that if assembly language had some practical applications in web programming, it might be more worth the time.
Having assembly language skills on your resume will show people that, even beyond having a good understanding of low-level machine function, that you are really interested in computer science and have devoted a considerable amount of your time toward seeking more knowledge.
discuss.fogcreek.com /joelonsoftware?cmd=show&ixPost=26214   (1347 words)

  
 ONLamp.com -- Why Learning Assembly Language Is Still a Good Idea
No, the real reason assembly language programs tend to be more efficient than programs written in other languages is because assembly language forces the programmer to consider how the underlying hardware operates with each machine instruction they write.
So if you know assembly language for your particular machine, you'll be able to correlate high-level language constructs with the machine language sequences that a compiler generates.
So even if the programmer never actually writes applications in assembly language, the knowledge makes the programmer aware of the problems with certain inefficient sequences so they can avoid them in their high-level code.
www.onlamp.com /pub/a/onlamp/2004/05/06/writegreatcode.html   (1654 words)

  
 X86 assembly language - Wikipedia, the free encyclopedia
x86 assembly language is the assembly language for the x86 class of processors, which includes Intel's Pentium series and AMD's Athlon series.
The x86 processor and instruction set design is CISC; however, in the latter half of the 1990s the internal architecture moved towards being more of a RISC or VLIW design.
Most modern x86 processors translate their instructions to one or more RISC-like "micro-ops" before they execute them, allowing the substeps of complex instructions to be executed in parallel in a superscalar fashion, rather than just being able to execute instructions in parallel as the original Pentium could do.
en.wikipedia.org /wiki/X86_assembly_language   (4435 words)

  
 What is assembly language? - A Word Definition From the Webopedia Computer Dictionary
Assembly languages have the same structure and set of commands as machine languages, but they enable a programmer to use names instead of numbers.
Each type of CPU has its own machine language and assembly language, so an assembly language program written for one type of CPU won't run on another.
Programmers still use assembly language when speed is essential or when they need to perform an operation that isn't possible in a high-level language.
www.webopedia.com /TERM/a/assembly_language.html   (239 words)

  
 Assembly languages
They are rarely used any more except for handling very low-level machine-specific tasks, since languages like C can generally satisfy most requirements, even low-level ones.
The other main use of assembly language is to provide the "glue" to enable different languages to be used in a single program.
It is however useful to know something about assembly language to get a feel for what goes on inside a processor, as well as for understanding code generation in compilers and for debugging when there is no source code available.
burks.bton.ac.uk /burks/language/asm   (333 words)

  
 PowerPC assembly
Assembly language is not widely known among the programming community these days, and PowerPC assembly is even more exotic.
High-level languages offer great advantages in general by hiding many mundane and repetitive details from programmers, allowing them to concentrate on their goals.
Assembly language is the programming language closest to the hardware, which makes it a natural last resort in such situations.
www-106.ibm.com /developerworks/library/l-ppc   (2585 words)

  
 Assembly Language programming   (Site not responding. Last check: 2007-10-21)
Assembly language programming is writing machine instructions in mnemonic form, using an assembler to convert these mnemonics into actual processor instructions and associated data.
The chosen language will undoubtably need to be converted into the appropriate binary bit-patterns which make sense to the target processor (the processor on which the software will be run).
In writing assembly language programs for micro-computers, it is essential that a standardized format be followed.
www.xploiter.com /mirrors/asm/asm_1.htm   (1958 words)

  
 The Object Oriented Programming Web - Assembly Directory
The book is divided into seven main sections: a section on machine organization and architecture, a section on basic assembly language, a section on intermediate assembly language, a section on interrupts and resident programs, a section covering IBM PC hardware peculiarities, a section on optimization, and various appendices.
The document has the primordial function of introducing you to assembly language programming, and it has been thought for those people who have never worked with this language.
This is one of the main references used by assembly programmers.
oopweb.com /Assembly/Files/Assembly.html   (164 words)

  
 x86 Assembly Language FAQ - General Part 1/3   (Site not responding. Last check: 2007-10-21)
From: raymoon@ms1.dgsys.com (Raymond Moon) Newsgroups: alt.lang.asm, comp.lang.asm.x86 Subject: x86 Assembly Language FAQ - General Part 1/3 Date: 21 Mar 2000 23:02:28 GMT Message-ID: <8b8v24$n7i$1@news.dgsys.com> Reply-To: raymoon@moonware.dgsys.com Summary: This is the FAQ for the x86 Assembly Language programmers for the alt.lang.asm and comp.lang.asm.x86 newsgroups.
To program directly in machine language is tedious, so you use assembly language instead, and use an assembler to produce the actual machine code.
Assembly language is very flexible and powerful; anything that the hardware of the computer is capable of doing can be done in assembly.
www.faqs.org /faqs/assembly-language/x86/general/part1   (3183 words)

  
 FreeBSD Assembly Language Programming
Portability is generally not one of the strengths of assembly language.
assembly language background, you may be used to writing directly to the video hardware.
For example, you may be parsing the input stream for a textual string (e.g., when implementing a language compiler): If a character is followed by another character, or perhaps a digit, it is part of the token you are processing.
www.int80h.org /bsdasm   (11498 words)

  
 HLA: The High Level Assembly Programming Language | Linux Journal
For those interested in learning more about HLA and the Art of Assembly Language programming, Yahoo Groups offers aoaprogramming, which, as the Web site states, is a "forum for those interested in learning and working with Randall Hyde's HLA assembler." At the time of this writing, aoaprogramming had over 1,089 members.
The HLA (High Level Assembly) language was developed as a tool to help teach assembly language programming and machine organization to University students at the University of California, Riverside.
Real assembly language programmers don't need C++ style crutches (which is what HLA looks like) and unless one is prepared to fully understand the underlying machine architecture, one will *NEVER* be any good at assembly language.
www.linuxjournal.com /article/8408   (1759 words)

  
 Assembly Language Library by David Parker
You can use a classic assembly language trick to test if a unsigned integer is a power of two.
One of the classic assembly language tricks is taking the absolute value of a 2's complement integer.
This method is bad for clarity (although most experienced assembly language programmers would recognize it as a common idiom) and for register usage, but is good for speed because it gets rid of the test and jump.
www.dpgraph.com /assembly.html   (4793 words)

  
 Programmed Introduction to MIPS Assembly Language
his is a course in assembly language programming of the MIPS processor.
ssembly Language is normally taken the semester after a course in a high level programming language (such as Java or C).
ssembly language: what it is, why it is studied, and where it is used.
chortle.ccsu.edu /AssemblyTutorial/TutorialContents.html   (470 words)

  
 Amazon.com: Assembly Language Step-by-step: Programming with DOS and Linux (with CD-ROM): Books: Jeff Duntemann   (Site not responding. Last check: 2007-10-21)
If you are new to assembly, or want to fill in some gaps in you knowlege this is a great book to start with.
Those instructions are in assembly and the other languages use assembly to assess computer parts to make everything work.
This book is great for assembly language beginners and programmers, It could even help fill in missing information for experienced programmers.
www.amazon.com /exec/obidos/tg/detail/-/0471375233?v=glance   (1524 words)

  
 Amazon.com: The Art of Assembly Language: Books: Randall Hyde   (Site not responding. Last check: 2007-10-21)
This chapter is a "quick-start" chapter that lets you start writing basic assembly language programs as rapidly as possible.
There it is, if you are looking for the traditional assembly language, this book is not for you.
Because, the path you are taken to the assembly is through some `nor-assembly-nor-high level' kind of all new language.
www.amazon.com /exec/obidos/tg/detail/-/1886411972?v=glance   (1191 words)

  
 Whiz Kid Technomagic
And since assembly language programs are considerably faster than programs written in other languages, the difference in speed of image filtering is mind boggling.
Not only is assembly language easier in Windows 95 than it was in Windows 3.x, it is, in my opinion, even easier than it was under MS DOS.
No longer needs the assembly language programmer be concerned with various interrupts, memory segments, writing directly to the screen, or accessing extended memory.
www.geocities.com /SiliconValley/Heights/7394   (4016 words)

  
 Assembly Language   (Site not responding. Last check: 2007-10-21)
This summary is now explained in more patient detail in a series of web pages starting at Introduction to Assembly Language.
Most data structures are abstract structures and are implemented by the programmer with a series of assembly language instructions.
The assembly language programmer must also pay attention to word length and optimum (or required) addressing boundaries.
www.osdata.com /topic/language/asm.htm   (13118 words)

  
 Typed Assembly Language   (Site not responding. Last check: 2007-10-21)
Typed Assembly Language (TAL) extends traditional untyped assembly languages with typing annotations, memory management primitives, and a sound set of typing rules.
Moreover, the typing constructs are expressive enough to encode most source language programming features including records and structures, arrays, higher-order and polymorphic functions, exceptions, abstract data types, subtyping, and modules.
Consequently, TAL is an ideal target platform for type-directed compilers that want to produce verifiably safe code for use in secure mobile code applications or extensible operating system kernels.
www.cs.cornell.edu /talc   (145 words)

  
 Assembly Language Windows Applications   (Site not responding. Last check: 2007-10-21)
Even though Assembly Language programming seems to be a lost and dying art, the Web is chock full of interesting and useful resources.
The world has a new Intel-compatible operating system written in 100% pure assembly language.
"The Art of Assembly Language Programming" is a textbook on machine organization and assembly language programming developed and written by Randall Hyde for his CS264 (Assembly Language Programming) course at Cal Poly Pomona and US Riverside.
grc.com /smgassembly.htm   (1214 words)

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