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Used in routine at F21E to pick a random value for the co-ordinates of the security code on the code sheet that needs to be entered.
The first 4 values are randomized, the next 4 are fixed (and used to further randomize the initial values)
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| F216 | DEFB $6B,$85 | System variable FRAMES cycle timer (2 bytes of it) stored here at start of code routine at F289 | ||
| F218 | DEFB $B9 | The (first) 2 bytes of the FRAMES timer are used as a random address to pick a byte from. The byte is stored here, in the routine at F289. |
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| F219 | DEFB $8B | The byte at F218 is copied here as well in the same routine. This will be the random value that the co-ordinates are generated from. |
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| F21A | DEFB $76,$B5,$53,$B0 | 4 byte values that are used to XOR and pixel-shift with the previous four, to create random numbers | ||
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