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Why Study Assembly Language:
The Chronology

This depends on the decade in which you studied assembly language.

1950’s You study assembly language because, other than raw binary
       machine language, it is the only way to program a computer.

1960’s & 1970’s
       You study assembly language in order to recode time–critical
       parts of your code generated by a compiler.

       In 1972, on a PDP–9, I could write assembly code that executed
       at least twice as fast as the equivalent compiled FORTRAN code.

1980’s You study assembly language in order to maintain the large base
       of legacy code, written in assembly language.

Today   Legacy code is still an issue, though a minor one.

             We study assembly language in order to understand the architecture
             of the computer and the nature of the software services provided.

             Focus on compilers and the run–time system.

by 进化中的兔子 发表于:2010/8/14 17:51:12
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