Re: Assembler Help

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#372

From: Randy G Jouett
Date: Thu, 06 Jul 1989 06:38

35 lines
1221 bytes

	It is also important to note that moving data address register
direct will not set the condition codes of that status register. That is:

	lea	DosName(pc),a1
	moveq	#33,d0

;The next instruction will not set the condition codes.

	move.l	_AbsExecBase,a6
	jsr	_LVOOpenLibrary(a6)

;the following line won't set them either.

	move.l	d0,a0
	beq	NoDos			;wud never be taken if d0 is NULL.

	Here is how the code should look:

	lea	DosName(pc),a1
	moveq	#33,d0
	move.l	_AbsExecBase,a6
	jsr	_LVOOpenLibrary(a6)
	move.l	d0,DBase(a4)		;base relative addressing via geta4(),
					;_LinkerDB, etc.

	beq	NoDos			;no dos around these parts.
	move.l	d0,An			;if you want to put DosBase in an
					;address register.


	Hope all this helps.....................

--
Randy Jouett  sun!portal!cup.portal.com!nop  or  nop@cup.portal.com

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!sun-barr!cs.utexas.edu!uunet!portal!cup.portal.com!nop
From: nop@cup.portal.com (Randy G Jouett)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Assembler Help
Message-ID: <20172@cup.portal.com>
Date: 6 Jul 89 06:38:52 GMT
References: <20123@cup.portal.com>
Organization: The Portal System (TM)
Lines: 35

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