Obviously, we did not write all of the preceding code just for fun; we need to write some code for the virtual processor. Since the architecture is very limited and restricted to a specific task, there are not too many options as to what the code may look like:

; Virtual code                     ; Binary output
vm_code_start:
   vm_load_key                     ; 0x00
   vm_load_data_length             ; 0x02
   vm_nop                          ; 0x01
 .encryption_loop:    
   vm_load_data_byte register_b    ; 0x30 0x01
   vm_encrypt register_b           ; 0x20 0x01
   vm_store_data_byte register_b   ; 0x31 0x01
   vm_loop .encryption_loop        ; 0x10 0xf5 0xff 0xff 0xff

   vm_exit                         ; 0x12