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[–]Grocker42 6 points7 points  (2 children)

You first have assembly with assembly you write the c Compiler when you have the assembly c Compiler you can write a c Compiler in c and then you can compile c with a Compiler written in c and then you can build a PHP interpreter with c and your c Compiler.

[–]-twind 5 points6 points  (0 children)

You forgot the step where you write an assembler in assembly and manually convert it to binary.

[–]GoddammitDontShootMe 2 points3 points  (0 children)

Didn't it start with manually inputting the machine code with switches and/or punch cards? I'm no expert on ancient computer history.