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Routines | 
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| GameEntry | 5B80 | DI | Disable interrupts. | |
| 5B81 | LD HL,$5F01 | Moves 20FF bytes from 5F01 to 5F00. | ||
| 5B84 | LD DE,$5F00 | |||
| 5B87 | LD BC,$20FF | |||
| 5B8A | LDIR | |||
| 5B8C | JP SecurityCheck | Jump to SecurityCheck. | ||
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View the equivalent code in;  
 
Later Ultimate games use more advanced decryption mechanisms;  
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