| Why Is
Universality True? |
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| v | Recall
(Lecture 4) that computers interpret |
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| instructions
using the fetch/execute cycle in hardware |
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| v | Everything
that a computer does, except the basic |
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| instructions,
is formulated as software, i.e. a series of |
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| instructions
accomplishing the task |
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| v | Suppose
computer A has a special instruction in its |
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| hardware
that computer B doesn’t have in its |
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| hardware
… and A’s software uses that instruction |
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| Computer
A’s Program |
| A’s Special
Instruction |
