home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
hackzapple.com
/
www.hackzapple.com.tar
/
www.hackzapple.com
/
LISA
/
DESERIALIZATION
/
P4.HTM.orig
< prev
next >
Wrap
Text File
|
2010-10-06
|
3KB
|
74 lines
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="Adobe PageMill 3.0 Mac">
<TITLE>pg 04</TITLE>
</HEAD>
<BODY BGCOLOR="#ffffff">
<P><CENTER><BR>
<FONT COLOR="#000000" SIZE="+3">Tool Theft Protection Modification<BR>
<BR>
</FONT><U><FONT COLOR="#000000" SIZE="+1">WARNING<BR>
<BR>
</FONT></U><B><FONT COLOR="#000000" SIZE="+1">You must never modify
an original tool diskette. Only modify diskette copies.<BR>
<BR>
</FONT></B></CENTER></P>
<P><FONT COLOR="#000000">The Lisa protects tools from illegal
duplication by the use of the unique serial nunber built into
every Lisa. When a tool is first installed, the diskette from
which the duplicate came is modified. To illustrate this modification
and the method of removing the modification the Macintosh application
FEdit will be used. FEdit displays and modifies raw disk blocks
on a Macintosh or Lisa Sony 400K diskette. A disk block contains
512 bytes. Numbers in hexadecimal (base 16) are proceeded by a
dollar sign ($).</FONT></P>
<BLOCKQUOTE>
<BLOCKQUOTE>
<P><CENTER><BR>
<B><U><FONT COLOR="#000000" SIZE="+1">NOTE</FONT></U></B></CENTER></P>
<BLOCKQUOTE>
<P><B><FONT COLOR="#000000">This modification can not be done
on the Lisa since no Lisa tools exist which allow a person to
modify diskettes at the block level.<BR>
</FONT></B></P></BLOCKQUOTE>
</BLOCKQUOTE>
</BLOCKQUOTE>
<P><FONT COLOR="#000000">Every Lisa diskette stores files in a
data structure known as the diskette catalog. This catalog begins
on block $23 and ends on block $26. The catalog contains entries
for each file present on the disk. For Lisa tools, the tool file
name has the unique structure</FONT></P>
<P><CENTER>{Txxx}OBJ</CENTER></P>
<P>where the xxx refers to a unique number which is assigned to
each tool. For example, the LisaCalc tool is stored under the
file name "{T3}OBJ". After the diskette catalog appears
a single block for every file in the catalog. These blocks contain
the information which, when modif ied, deserializes the tool so
that it may be used on other Lisas. To find the block which has
this tool information use FEdit starting at block $27 and sequentially
search for a block which has the tool name you wish to deserialize
in the first data line. On my LisaCalc diskette I found this information
block at block $2D. The original information appeared as follows:</P>
<P><CENTER> </CENTER></P>
<P><CENTER><FONT COLOR="#000000">(1988) Apple Lisa 7/7 Deserialization
2 of 4</FONT></CENTER></P>
<P><CENTER><A HREF="P5.HTM">Next</A></CENTER></P>
<P><CENTER><A HREF="P3.HTM">Back</A></CENTER></P>
<P><CENTER><A HREF="P1.HTM">Home</A></CENTER>
</BODY>
</HTML>