\ --- Mod: Code removed for Elite-A: ------------------> \.DEEOR \ \IF _STH_DISC OR _IB_DISC \ \ LDY #0 \ We're going to work our way through a large number of \ \ encrypted bytes, so we set Y to 0 to be the index of \ \ the current byte within its page in memory \ \ STY SC \ Set the low byte of SC(1 0) to 0 \ \ LDX #&13 \ Set X to &13 to be the page number of the current \ \ byte, so we start the decryption with the first byte \ \ of page &13 \ \.DEEORL \ \ STX SCH \ Set the high byte of SC(1 0) to X, so SC(1 0) now \ \ points to the first byte of page X \ \ TYA \ Set A to Y, so A now contains the index of the current \ \ byte within its page \ \ EOR (SC),Y \ EOR the current byte with its index within the page \ \ EOR #&33 \ EOR the current byte with &33 \ \ STA (SC),Y \ Update the current byte \ \ \ The current byte is in page X at offset Y, and SC(1 0) \ \ points to the first byte of page X, so we just did \ \ this: \ \ \ \ (X Y) = (X Y) EOR Y EOR &33 \ \ DEY \ Decrement the index in Y to point to the next byte \ \ BNE DEEORL \ Loop back to DEEORL to decrypt the next byte until we \ \ have done the whole page \ \ INX \ Increment X to point to the next page in memory \ \ CPX #&56 \ Loop back to DEEORL to decrypt the next page until we \ BNE DEEORL \ reach the start of page &56 \ \ JMP RSHIPS \ Call RSHIPS to launch from the station, load a new set \ \ of ship blueprints and jump into the main game loop \ \ELIF _SRAM_DISC \ \ JMP RSHIPS \ Call RSHIPS to launch from the station, load a new set \ \ of ship blueprints and jump into the main game loop \ \ENDIF \ --- End of removed code ----------------------------->Name: DEEOR, Removed [Show more] Type: Subroutine Category: Loader Summary: Decrypt the main flight code between &1300 and &55FF and jump into the main game loopContext: See this subroutine in context in the source code References: No direct references to this subroutine in this source file