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OSdata.com: assembly language 

OSdata.com

Assembly Language

logical operations

summary

    This web page examines logical instructions in assembly language. Specific examples of instructions from various processors are used to illustrate the general nature of assembly language.

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logical

    Logical instructions typically work on a bit by bit basis, although some processors use the entire contents of the operands as whole flags (zero or not zero input, zero or negative one output). Typical logical operations include logical negation or logical complement (NOT), logical and (AND), logical inclusive or (OR or IOR), and logical exclusive or (XOR or EOR). Logical tests are a comparison of a value to a bit string (or operand treated as a bit string) of all zeros. Some processors have an instruction that sets or clears a bit or byte in registers or memory based on the processor condition codes.

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free music player coding example

    Programming example: I am making heavily documented and explained open source PHP/MySQL code for a method to play music for free — almost any song, no subscription fees, no download costs, no advertisements, all completely legal. This is done by building a front-end to YouTube (which checks the copyright permissions for you).

    View music player in action: www.musicinpublic.com/.

    Create your own copy from the original source code/ (presented for learning programming). Includes how to run this from your own computer if you don’t have a web site.


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free computer programming text book project

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Some or all of the material on this web page appears in the
free downloadable college text book on computer programming.


I do the news as an unpaid volunteer for KOCI 101.5 FM, Newport Beach/Costa Mesa (also available on the web)


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    This web site handcrafted on Macintosh computers using Tom Bender’s Tex-Edit Plus and served using FreeBSD .

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    Names and logos of various OSs are trademarks of their respective owners.

    Copyright © 2000, 2001 Milo

    Created: February 21, 2001 (from machcode.htm)

    Last Updated: March 28, 2001


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