Newsgroups: comp.sys.apple2
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From: lgarde@scorch.apana.org.au (Leon Garde)
Subject: Re: where to find the applesoft start of program pointer
Organization: Craggenmoore public Unix system , Newcastle , Oz
Date: Thu, 18 Feb 1993 15:00:35 GMT
Message-ID: <1993Feb18.150035.14988@scorch.apana.org.au>
References: <9302140734.AA28953@apple.com>
Lines: 43

ST2975@SIUCVMB.SIU.EDU writes:

|I think one place is in the auxilliary filetype of the applesoft
|basic file.  I'm not sure if basic.system handles it automatically
|though.

Its not set for basic files is it ?

if you set $67 (low) $68 (high) (ie normal pointer at $67) 
then it will load at the point reffered to
$69  the start of the variable space,
	as set by lomem:

$6b pointer to array memory space

$6d a pointer to end of variable space,
this grows up.

$6f a pointer to start of string space.
string space goes to memsiz -1.
 this pointer grows down, down from the end of memory, as set by
memsiz, $73 . 
$73 pointer is  memsiz = end of string space + 1 byte 
$73 is set by himem:


$af = end of applesoft program.




to load an applesoft at the right address set the pointer, at $67  to
that address.
if the program must relocate itself, fine
set the pointer, then reload it ie
if pointer != rightaddress then reset pointer: ?"ctnrl-d run programn"


source : inside the apple //c.


leon