--- title: (C2SLFF4 | daily.dev description: A deep dive into the mysterious first line of the 1980 BASIC game 'The Wizard's Castle', originally published for the Exidy Sorcerer microcomputer. The cryptic... canonical: https://daily.dev/posts/c2slff4-on4pfnbag twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: (C2SLFF4 | daily.dev og:description: A deep dive into the mysterious first line of the 1980 BASIC game 'The Wizard's Castle', originally published for the Exidy Sorcerer microcomputer. The cryptic... og:url: https://daily.dev/posts/c2slff4-on4pfnbag og:image: https://api.daily.dev/og/posts/On4pfNbag.png og:image:alt: (C2SLFF4 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # (C2SLFF4 **[Hacker News](https://daily.dev/sources/hn)** · 16 min read · 0 upvotes · 0 comments ## Summary A deep dive into the mysterious first line of the 1980 BASIC game 'The Wizard's Castle', originally published for the Exidy Sorcerer microcomputer. The cryptic REM statement `"_(C2SLFF4` turns out to be Z80 machine code embedded directly in a BASIC comment, used to seed the game's pseudo-random number generator. The code reads the Z80 R register (which increments on every instruction fetch), stores a non-zero value into the lower-right corner of the screen's memory-mapped display, and then a subsequent PEEK reads that value to seed RND(). The investigation reveals that the printed ASCII characters in the magazine listing don't correspond to actual ASCII bytes — the Sorcerer's BASIC interpreter maps certain byte values to multi-character display strings, meaning anyone who typed the listing from the magazine would have gotten non-functional code. The author likely POKEd the machine code in directly and never documented how to reproduce it. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [\(C2SLFF4](https://daily.dev/posts/c2slff4-tzxn2doqg) · Beej's Blog · 0 upvotes · 0 comments - [BASICally, Its Retro Machine Language](https://daily.dev/posts/basically-its-retro-machine-language-06cdyyh22) · Hackaday · 0 upvotes · 0 comments - [10 PRINT CHR$\(205.5\+RND\(1\)\); : GOTO 10](https://daily.dev/posts/10-print-chr-205-5-rnd-1-goto-10-h1zenyynk) · Two Stop Bits · 0 upvotes · 0 comments - [Diving into Retro Computing with the Amstrad PCW 8256](https://daily.dev/posts/diving-into-retro-computing-with-the-amstrad-pcw-8256-yksnkio8j) · Scott Logic · 0 upvotes · 0 comments --- Tags: [#reverse-engineering](https://daily.dev/tags/reverse-engineering) [View this post on daily.dev](https://daily.dev/posts/c2slff4-on4pfnbag) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"(C2SLFF4","url":"https://daily.dev/posts/c2slff4-on4pfnbag","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/c2slff4-on4pfnbag"},"datePublished":"2026-07-22T15:07:50.769Z","dateModified":"2026-07-22T15:08:23.269Z","description":"A deep dive into the mysterious first line of the 1980 BASIC game 'The Wizard's Castle', originally published for the Exidy Sorcerer microcomputer. 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