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+*-----------------------------------------------------------
+* Title      : Ceasar chipher
+* Written by : Manuel V?gele, Simon W?rner (Team 1)
+* Date       : 12.05.2015
+* Description: This program encrypts a string using ROT3
+*-----------------------------------------------------------
+    ORG    $3000
+START:                  ; This is where the program starts - obviously
+
+* Put program code here
+    
+    ; Load string address
+    move.l  #input, A0
+    move.l  #output, A1
+    
+LOOP:
+    ; Load char to register
+    move.b  (A0), D0
+    
+    ; If end of string is reached end loop
+    cmp.b   #0, D0
+    beq     LOOP_END
+    
+    ; Apply the encryption key
+    add.b   #key, D0
+    
+    ; Make the char lower case
+    move.b  D0, D1
+    or.b    #casebit, D1
+
+    ; Check if char is greater than 'z'
+    cmp.b   #z, D1
+    ble     WRITE_CHAR
+    
+    ; Cycle to A after Z
+    sub.b   #alphabetLength, D0
+    
+WRITE_CHAR:
+    ; Write the encrypted char to the output string
+    move.b  D0, (A1)
+    
+    ; Move pointers to next char
+    add.l   #1, A0
+    add.l   #1, A1
+    bra     LOOP
+
+LOOP_END:
+
+    ; Add '\0' at output string end
+    move.b  #0, (A1)
+
+    SIMHALT             ; halt simulator
+
+* Put variables and constants here
+
+input           dc.b    'Zykluszeit',0
+output          ds.b    11
+
+key             EQU     3
+
+z               EQU     'z'
+casebit         EQU     $20
+alphabetLength  EQU     26
+
+
+    END    START        ; last line of source
+
+
+
+
+*~Font name~Courier New~
+*~Font size~10~
+*~Tab type~1~
+*~Tab size~4~