This code appears in the following versions (click to see it in the source code): Cassette, Disc (flight), Disc (docked), 6502 Second Processor, Master and Electron Code variations between these versions are shown below. .YSAV2 Code variation 1 of 1A variation in the comments onlyTap on a block to expand it, and tap it again to revert. Cassette, Flight, ElectronDocked6502SP, Master SKIP 1 \ Temporary storage, used for storing the value of the Y \ register in the TT26 routine SKIP 1 \ Temporary storage, used for storing the value of the Y \ register in the CHPR routine SKIP 1 \ This byte appears to be unused