Re: help with LAP op-codes

[Richard Stallman]

    1) what's the purpose of op-code 90 (\132) the instruction byte-diff ?

It subtracts one number from another.

    2) what's the purpose of op-codes, and what arguments do they take on stack?

      \220     byte-temp-output-buffer-setup

It does the beginning of with-output-to-temp-buffer,

      \221     byte-temp-output-buffer-show

It does the end of with-output-to-temp-buffer,

      \217     byte-condition-case

It implements a condition-case.  Disassemble a function
that uses condition-case to see how it is used.