Specifications

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At the end of the "list" file there is a table of symbols used in a program. Useful element of 'list'

file is a graph of memory utilization. At the very end, there is an error statistic as well as the

amount of remaining program memory.

Macros

Macros are a very useful element in assembly language. They could briefly be described as "user

defined group of instructions which will enter assembler program where macro was called". It is

possible to write a program even without using macros. But with their use written program is

much more readable, especially if more programmers are working on the same program together.

Macros have the same purpose as functions of higher program languages.

How to write them:

<label> macro [<argument1>,<argument2>,......<argumentN>]

........

.......

endm

From the way they were written, we could be seen that macros can accept arguments, too which

is also very useful in programming. Whenever argument appears in the body of a macro, it will be

replaced with the <argumentN> value.

Example:

The above example shows a macro whose purpose is to place on port B the ARG1 argument that

was defined while macro was called. Its use in the program would be limited to writing one line:

ON_PORTB 0xFF , and thus we would place value 0xFF on PORTB. In order to use a macro in the

program, it is necessary to include macro file in the main program with instruction include

"macro_name.inc". Contents of a macro is automatically copied onto a place where this instruction

was written. This can be best seen in a previous list file where file with macros "bank.inc" was

copied below the line #include"bank.inc"

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