;This article describes the modification of Carbon Copy Plus V4.0
; using the serial number 03078888 for example you can easily
; make and understand part of the protection Scheme.
;
; Earlier versions are not worth un protecting
;
; The serial number is protected to death and is used in the determination
; of various versions of Carbon Copy and should not be changed.
;
;Example of level 1 serial number checks is given below
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; for a FAST unptotect do the following
C>patch cchelp.dif cchelp.exe cchelp.new
C>copy cchelp.new cchelp.exe
C>del cchelp.new
;;
;; Patch is Borlands turbo C patch utility
;; which is a public domain program and is included in this archive
;; or found else where on this bbs
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; Details
;
2533:76B7 B8D0C8         MOV	AX,C8D0 
2533:76BA 0306136F       ADD	AX,[6F13] '07' of 03078888
2533:76BE 7555           JNZ	7715 	; death
2533:76C0 C706B571F85E   MOV	Word Ptr [71B5],5EF8 
c8d0 is derived from (NOT 3730)+1 from the one's complement
- there are two more of these
- at 355b (6f15) and 7776 (6f17)
- the '03' is used for some reserved purpose.

;Here is the focus of this article, the patch to get rid
;of that money Grubbing check, ie cannot use the same copy with itself
;;
;; This is the routine we wanna examine.
;;
2533:8BA0 BE116F         MOV	SI,6F11  'beginning of 03078888'
2533:8BA3 8B07           MOV	AX,[BX] 
2533:8BA5 3B04           CMP	AX,[SI] 
2533:8BA7 751D           JNZ	8BC6    'serial # not equal, OK!'
2533:8BA9 83C302         ADD	BX,+02 	 'Death Routine because same ser#'
2533:8BAC 83C602         ADD	SI,+02 
2533:8BAF 81FB965E       CMP	BX,5E96 
2533:8BB3 75EE           JNZ	8BA3 

; to make the patch do this
C>ren cchelp.exe cchelp.dat
C>debug cchelp.dat
-f 8ba7 8ba7 eb	  <--Type this

-u 8ba0	<-- type this

; you will see the following..........
2533:8BA0 BE116F         MOV	SI,6F11 
2533:8BA3 8B07           MOV	AX,[BX] 
2533:8BA5 3B04           CMP	AX,[SI] 
2533:8BA7 EB1D           JMP	8BC6 	  ** Must see a JMP here
2533:8BA9 83C302         ADD	BX,+02 
2533:8BAC 83C602         ADD	SI,+02 
2533:8BAF 81FB965E       CMP	BX,5E96 
2533:8BB3 75EE           JNZ	8BA3 
-w   <- Type this
 Writing xxxxx bytes
-q   <-Type this
C>ren cchelp.dat cchelp.exe  <type this 

:::DONE!!!!!!!!!!!!!!!!
;;;; From the Swash Bucklers BBS 
;;;;;By the Riceball