Path: utzoo!mnetor!uunet!husc6!m2c!applix!scott
From: scott@applix.UUCP (Scott Evernden)
Newsgroups: comp.sys.amiga
Subject: Re: LVOs and SetFunction
Message-ID: <661@applix.UUCP>
Date: 7 Mar 88 06:44:18 GMT
References: <8803060000.AA29981@cory.Berkeley.EDU>
Sender: news@applix.UUCP
Reply-To: scott@applix.UUCP (Scott Evernden)
Organization: APPLiX Inc., Westboro MA
Lines: 35

In article <8803060000.AA29981@cory.Berkeley.EDU> dillon@CORY.BERKELEY.EDU (Matt Dillon) writes:
>
>>First off, where do the LVOs come from? Is there some file (I hope) with them
>>defined?  Where does one get this file? 
>
>	LVOs are defined IN the link library...  They are actual symbols
>used as offsets.  I suppose you can recover them by decoding the link
>library.  Otherwise, if you don't have access to a list you need to
>write a program that simply prints their values out.


I do it this way from Manx:
===========================

extern int lvoScrollRaster;

VOID myScrollRaster();

/*********************************************/
/* get the ABS symbol describing gfx/intui lib offsets
 */
#asm
    public  _LVOScrollRaster

    dseg
_lvoScrollRaster        dc.w    _LVOScrollRaster

    cseg
#endasm


    oldScrollRaster = SetFunction(GfxBase, (long) lvoScrollRaster,
                                    myScrollRaster);

-scott