The Enigma of The Wizard’s Castle Comment Finally Solved
In July 1980, Recreational Computing magazine published the source code for The Wizard’s Castle, a roguelike game written in BASIC for the Exidy Sorcerer microcomputer. The very first line of this listing, 10 REM"_(C2SLFF4, immediately raised questions. Superficially, it appeared to be a standard comment (denoted by the REM operator), which the BASIC interpreter would typically ignore, serving only for human readability. However, the sequence of characters "_(C2SLFF4 was an unintelligible jumble.
The Surprising Truth: A Comment That Was Actually Machine Code
The editorial team at PROSTO24 conducted an in-depth investigation, utilizing emulators and analyzing memory dumps. The findings revealed that the mysterious string "_(C2SLFF4 was neither a random sequence nor a typographical error. Instead, it was carefully disguised machine code, cleverly embedded within what appeared to be a mere comment. This discovery indicates that what seemed like an innocuous remark was, in fact, an integral and executable part of the program.
This revelation also clarifies why readers who diligently re-typed the game’s listing from the magazine would have been unable to run The Wizard’s Castle. Without the understanding that a portion of the comment constituted executable code, the game was destined to fail. This case highlights the ingenuity of early developers and the unique challenges faced by computing enthusiasts during the dawn of personal computing.
This is absolutely fascinating! The idea of embedding machine code within a BASIC REM statement is such a clever hack for its time. I’m curious, were there other known instances of developers using similar ‘hidden code’ techniques in early microcomputer games, or was this a particularly unique case for The Wizard’s Castle? It makes me wonder about the debugging nightmares this must have caused. What other challenges did this type of obfuscation present for early programmers and users?