The most imporant desktop computer competitor,in terms of lognevity and acceptance,that has survived the longest with the least alteration was (and is) the original Apple.(its predecessor apple was more a design effort than a commercial prodcut)The design of the apple was innovative and clever and it introduced features and technologies which will soon become familiar in the discussion of the implementation of the IBM PC. The original apple computer blazed a path as one of the first single board computers that also featured a dedicated expansion bus into accessories (and some necessities)could be attached.The key board was combined into the housing for the electronics a simple practical and cost effective approach. The central processing unit of the apple computer was a microprocessor that bore the designation 6502 at the time a respectable chip choice,and could perform 64 bit calculations at an operating speed of about one millions cycles per second (MHz). The straight forward original design of the apple compute made no provision for lower case letters,could but only 200 columns of test across the screen and could bought with as little as 16 kilobytes of memory for more permanent storage it could route data from its electronic memory onto magnetic tape using a conventional audio cassette machine.later additions to the apple computer repertory included lower case characters in 160 coloumns bit mapped graphics,and disk storage controlled by apple (D.O.S) means (disk operating system).some of these potential additions were neither foreseen nor allowed for the original design and was a consequence,requried some clever engineering ( which was duly provided)these design alterations resulted in some workable but odd adaptations particularly in memory structure in which alternate characters on the screen for example:were separated into different biocks of memory..
Wednesday, 7 January 2015
What is the Apple computer? and how it work fast from other computers
The most imporant desktop computer competitor,in terms of lognevity and acceptance,that has survived the longest with the least alteration was (and is) the original Apple.(its predecessor apple was more a design effort than a commercial prodcut)The design of the apple was innovative and clever and it introduced features and technologies which will soon become familiar in the discussion of the implementation of the IBM PC. The original apple computer blazed a path as one of the first single board computers that also featured a dedicated expansion bus into accessories (and some necessities)could be attached.The key board was combined into the housing for the electronics a simple practical and cost effective approach. The central processing unit of the apple computer was a microprocessor that bore the designation 6502 at the time a respectable chip choice,and could perform 64 bit calculations at an operating speed of about one millions cycles per second (MHz). The straight forward original design of the apple compute made no provision for lower case letters,could but only 200 columns of test across the screen and could bought with as little as 16 kilobytes of memory for more permanent storage it could route data from its electronic memory onto magnetic tape using a conventional audio cassette machine.later additions to the apple computer repertory included lower case characters in 160 coloumns bit mapped graphics,and disk storage controlled by apple (D.O.S) means (disk operating system).some of these potential additions were neither foreseen nor allowed for the original design and was a consequence,requried some clever engineering ( which was duly provided)these design alterations resulted in some workable but odd adaptations particularly in memory structure in which alternate characters on the screen for example:were separated into different biocks of memory..
