The algorithm shown in the table below ends up being 18 bytes of code...
Key In | 7 |
Add Rotor | 8 |
Add 1 | 9 |
Over 9? Sub 10 | 9 |
Sub RingSt | 4 |
Negative? Add 10 | 4 |
;CALL_WITH_A_KEY_TO_ENCODE ;CALL_WITH_X_OFFSET_TO_ROTOR ;REM_SUB_ENRING 0103 ENRING 0103 SEC 38 0104 ADC *ROTORS,X 75 57 0106 CMP #$0A C9 0A 0108 BCC ENRIK1 90 02 010A SBC #$0A E9 0A 010C ENRIK1 010C SEC 38 010D SBC *RINGST,X F5 53 010F BCS ENRIK2 B0 02 0111 ADC #$0A 69 0A 0113 ENRIK2 0113 CLC 18 0114 RTS 60
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