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GNU Emacs Calc 2.02 Manual

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3.7.46 Types Tutorial Exercise 14

How long will it take for a signal to get from one end of the computer to the other?

 
1:  m / c         1:  3.3356 ns
    .                 .

 ' 1 m / c RET        u c ns RET

(Recall, `c' is a "unit" corresponding to the speed of light.)

 
1:  3.3356 ns     1:  0.81356 ns / ns     1:  0.81356
2:  4.1 ns            .                       .
    .

  ' 4.1 ns RET        /                       u s

Thus a signal could take up to 81 percent of a clock cycle just to go from one place to another inside the computer, assuming the signal could actually attain the full speed of light. Pretty tight!


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