Language Processors
The macro processor must perform

save the macro definitions
expand macro calls and substitute arguments
All of these
recognize macro definitions and macro calls

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Language Processors
A base register table

allows the programmer to write base registers and displacements explicitly in the source program
allows multiple programs to reside in separate areas of core at the same time
is a term that refers to the control programs of an operating system
is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain

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Language Processors
Terminal Table

consists of a full or partial list of the tokens as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
contains all constants in the program
a permanent table which lists all key words and special symbols of the language in symbolic form

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Language Processors
An Interpreter is

a program that automate the translation of assembly language into machine language
a program that places programs into memory and prepares them for execution
is a program that appears to execute a source program as if it were machine language
program that accepts a program written in a high level language and produces an object program

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