Re: A89: Starting out assembly, need help

To: assembly-89@lists.ticalc.org
Subject: Re: A89: Starting out assembly, need help
From: Daniel7073@aol.com
Date: Wed, 2 Dec 1998 21:13:58 EST
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-89@lists.ticalc.org


In a message dated 12/02/1998 6:02:19 PM Pacific Standard Time,
TurboSoft@aol.com writes:

> what is a macro, how do l use it, what are they for?
A macro is similar to a function, except when it is called, the code in the
macro is put in the spot of the macro instruction.

Example:  (the macro definition is almost certainly incorrect)

	MACRO CallSomeFunc
	move.l #5,-(a7)
	jsr lib::somefunc
	add.l #4, a7
	ENDM

main:
	jsr util::zap_screen
	CallSomeFunc
	rts

At compile time, this code would be replaced with:

main:
	jsr util::zap_screen
	move.l #5,-(a7)  
  	jsr lib::somefunc   
  	add.l #4, a7  
	rts


I hope this helps.

Daniel Imfeld

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