翻訳と辞書
Words near each other
・ cyberwand
・ cyberzine
・ cybil
・ cyc
・ cycl
・ cycle
・ cycle crunch
・ cycle drought
・ cycle of reincarnation
・ cycle server
cyclebabble
・ cyclic redundancy check
・ cyclic redundancy code
・ cyclo
・ cyclomatic complexity
・ cygnus tcl tools
・ cylinder
・ cyphertext
・ cyrix
・ cyrix 6x86


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cyclebabble : FOLDOC
cyclebabble
Advertising raw clock speed, instead of {bus speed}.
IBM uses raw clock speed as the speed of the computer. In the IBM PC and IBM PC XT, the clock is divided by 4 to produce the 4-phase bus clocks. Thus a 4 MHz IBM XT really runs at 0.895 MHz, because that 4 MHz was really 3.58 MHz which gets divided by four.
A Tandy {Color Computer} ran at exactly the same speed, but clock speed was specified as bus speed, 0.895 MHz, leaving the impression that it was 4 times slower. Actually it ran a little faster with a more efficient instruction set. If the actual clock rate had been specified on a {CoCo 3}, it would have been 14.32 MHz, although the bus speed was still 0.895 MHz. That high speed also generated video, color, and {hidden refresh} timing.
100 MHz computers are running at bus speeds of around 25 MHz.
(1997-02-13)



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