http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=Chexsum 2026-04-07T20:03:59Z Revision history for this page on the wiki MediaWiki 1.19.2 http://fileformats.archiveteam.org/index.php?title=Chexsum&diff=51474&oldid=prev 2026-02-13T05:33:35Z

<p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 05:33, 13 February 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 24:</td> <td colspan="2" class="diff-lineno">Line 24:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/msxgamesbookandrewlaceyfoundpage56andaddedhere/page/n9/mode/2up MSX Games Book pg 6]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/msxgamesbookandrewlaceyfoundpage56andaddedhere/page/n9/mode/2up MSX Games Book pg 6]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/amstrad-games-book-cpc-464-664-kevin-bergin-andrew-laceyacme/page/2/mode/2up Amstrad Games Book pg 3]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/amstrad-games-book-cpc-464-664-kevin-bergin-andrew-laceyacme/page/2/mode/2up Amstrad Games Book pg 3]</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [https://archive.org/details/writing-adventure-games-on-the-amstrad-mike-lewis-simon-price-1985acme/page/154/mode/2up Writing Adventure Games on the Amstrad pg 155]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [https://archive.org/details/writing-adventure-games-on-the-amstrad-mike-lewis-simon-price-1985acme/page/154/mode/2up Writing Adventure Games on the Amstrad pg 155] <ins class="diffchange diffchange-inline">([http://people.cs.bris.ac.uk/~ecsnp/games/Writing%20Adventure%20Games%20on%20the%20Amstrad.pdf alternate source])</ins></div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [https://archive.org/details/Atari_130XE_Games_Book/page/n11/mode/2up Atari 130XE Games Book pg 3]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [https://archive.org/details/Atari_130XE_Games_Book/page/n11/mode/2up Atari 130XE Games Book pg 3] <ins class="diffchange diffchange-inline">([https://www.atarimania.com/documents/Atari_130XE_Games_Book.pdf alternate source])</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">** [http://atarionline.pl/v01/utils2.php?ct=utils2&amp;sub=9.%20Rozne&amp;title=+Atari+130+XE+Games+Book&amp;file=Atari+130+XE+Games+Book.atr .ATR file] ([http://atarionline.pl/v01/index.php?ct=utils2&amp;sub=9.%20Rozne source page])</ins></div></td></tr> </table>

Parchivist http://fileformats.archiveteam.org/index.php?title=Chexsum&diff=51471&oldid=prev 2026-02-13T05:04:55Z

<p>Created page with &quot;{{FormatInfo |subcat=Error detection and correction |released=1983 }} &#039;&#039;&#039;Chexsum&#039;&#039;&#039; is a type-in program checker for the Commodore 64 and 16, Amstrad CPC 464 and 664, Atari 13...&quot;</p> <p><b>New page</b></p><div>{{FormatInfo<br /> |subcat=Error detection and correction<br /> |released=1983<br /> }}<br /> '''Chexsum''' is a type-in program checker for the Commodore 64 and 16, Amstrad CPC 464 and 664, Atari 130XE, and MSX used by Melbourne House Publishers.<br /> <br /> It displays a four-digit checksum for each entered line.<br /> <br /> It can sometimes see a '.' as a ',' and a ';' as a ':' if they fall on certain positions in a program line.<br /> <br /> There are different versions in each book.<br /> <br /> <br /> == Sample Output ==<br /> [[File:Chexsum.gif]]<br /> <br /> <br /> == Links ==<br /> * [https://archive.org/details/commodore-64-games-book/page/n13/mode/2up Commodore 64 Games Book pg 4] ([https://github.com/OldSkoolCoder/Melbourne-House-Commodore-64-Games-Book/tree/master/Book alternate source])<br /> * [https://archive.org/details/commodore-64-games-book-2/page/n13/mode/2up Commodore 64 Games Book 2 pg 7] ([https://github.com/OldSkoolCoder/Melbourne-House-Commodore-64-Games-Book-2/tree/master/Book alternate source])<br /> * [https://archive.org/details/Machine_Language_for_the_Absolute_Beginner_1984_Melbourne_House/page/n181/mode/2up?q=chexsum Commodore 64 Machine Language for the Absolute Beginner pg 176]<br /> * [https://archive.org/details/commodore-16-games-book/page/8/mode/2up Commodore 16 Games Book pg 16]<br /> * [https://plus4world.powweb.com/software/Chexsum C16 PRG file]<br /> * [https://archive.org/details/msxgamesbookandrewlaceyfoundpage56andaddedhere/page/n9/mode/2up MSX Games Book pg 6]<br /> * [https://archive.org/details/amstrad-games-book-cpc-464-664-kevin-bergin-andrew-laceyacme/page/2/mode/2up Amstrad Games Book pg 3]<br /> * [https://archive.org/details/writing-adventure-games-on-the-amstrad-mike-lewis-simon-price-1985acme/page/154/mode/2up Writing Adventure Games on the Amstrad pg 155]<br /> * [https://archive.org/details/Atari_130XE_Games_Book/page/n11/mode/2up Atari 130XE Games Book pg 3]</div>

Parchivist