🚀 go-pugleaf

Phil Katz has supplied the following patch for PKARC 2.0 in response to
objections that the "squashing" is not supported by ARC512.

--cut--here--DISSQASH.PAT--cut-here--
By default, PKARC 2.0 will "squash" a file if this compression 
technique would appear to be optimal for that file.  While I 
personally do not think it is desirable to change this, this patch is 
presented at the request of others who disagree.
 
However, PLEASE DO NOT distribute PKARC 2.0 if it has been patched as 
shown in this document.  Not only can this create problems for 
recipients of the program that are not aware that the program has 
been patched, but it is also in strict violation of the license 
agreement in PKARC to distribute the program in modified form.  
 
PKWARE INCORPORATED RESERVES THE RIGHT TO FIND ANYONE WHO DISTRIBUTES 
PKARC IN MODIFIED FORM WITHOUT EXPRESS WRITTEN CONSENT FROM PKWARE 
INCORPORATED TO BE IN VIOLATION OF THE SOFTWARE LICENSE AGREEMENT AND
LIABLE FOR DAMAGES.
 
Using DEBUG, change the byte at offset F25 hex in the file PKARC.COM,
version 2.0, dated 12-15-86.  The value in the distribution copy is 
75 hex.
 
Changing this value will yield the results shown:
 
Byte at F25	Program Behavior
------------	----------------
 
    75		This is the 'normal' value.  Squashing will be
		performed by default, when it is optimal.
 
    74		Reverses the meaning of the "/oc" flag.  By default
		squashing will NOT be performed.  Specifying "/oc"
		on the command line will ENABLE squashing when it
		is optimal.
 
    EB		Permanently disables squashing.  Squashing will
		never be performed, regardless if the "/oc" flag is 
		specified or not.
 
WARNING: Changing the value of this byte to any other value will cause 
unpredicatble program operation.
 

 
The following example session with debug will change the value to 74.
 
Enter
 
debug pkarc.com<CR>
 
where <CR> means the enter key.  Debug will display a "-" prompt.  Then enter
 
ef25<CR>.
 
Debug will display something like "xxxx:0F25  75.".  The xxxx value will
vary from computer to computer.  Debug should display the number 75 as
above.  If this value is not 75, then you do not have PKARC 2.0 and
should not continue.  Enter
 
74<CR>
 
followed by
 
w<CR>
 
and then
 
q<CR>.
 
 
The result should appear similar to:
 
A>debug pkarc.com
-ef25
xxxx:0F25  75.74
-w
Writing 4430 bytes
-q
A>
 
 
 
		-Phil Katz  1/14/87
--cut-here--
-- 
--Keith Petersen
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