https://fpgartktic.github.io/hugo-theme-c64-boot/tags/1541/Recent content in 1541 on FPGArtkticHugoenMIT-licensed theme. Not affiliated with Commodore.Sun, 14 Jun 2026 00:00:00 +0000https://fpgartktic.github.io/hugo-theme-c64-boot/posts/254-bytes-per-block/Sun, 14 Jun 2026 00:00:00 +0000https://fpgartktic.github.io/hugo-theme-c64-boot/posts/254-bytes-per-block/<p>A 1541 sector holds 256 bytes. Two of them are the track and sector of the next block in the chain, which leaves 254 bytes of your file per block. That is why the directory listing beside this post counts in 254s: the numbers are computed from the real length of each page, not decorated.</p> <h2 id="why-664">Why 664</h2> <p>A freshly formatted disk reports <code>664 BLOCKS FREE.</code> — 683 sectors on 35 tracks, minus the 18 the directory track keeps for itself, minus one for the BAM. The number on this site is 664 less whatever the pages actually occupy.</p>