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Routines |
| Prev: F268 | Up: Map | Next: F289 |
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Used by the routine at F296.
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The code sheet is referenced with a letter (A-P) and a set number (0-41), but these are stored as two numbers, from 0-15 and 0-41 respectively.
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| F274 | CALL $F21E | Call hashing routine to obfuscate data at F216 | ||
| F277 | AND $0F | The A register is returned with a hashed/randomized value - the 4th byte of the data set at F216. Keep bits 0-3 (values 0-15) |
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| F279 | LD ($F261),A | Store as first part of code from code sheet (this will signify the letter, A-P) | ||
| F27C | CALL $F21E | Call hashing routine again | ||
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Get the number in the range 0-41 as this is the number of code sheet rows:
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| F27F | SUB $2A | Subtract 42 | ||
| F281 | JR NC,$F27F | Still positive (>=0)? If so, keep subtracting | ||
| F283 | ADD A,$2A | Add 42 to get the number in the range 0 to (+)41 | ||
| F285 | LD ($F260),A | Store as second part of code from the code sheet (number) | ||
| F288 | RET | |||
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