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    <title>retrocomputing &amp;mdash; G&#39;s Blog</title>
    <link>https://blog.marcg.pizza/marcg/tag:retrocomputing</link>
    <description>Just a place to post random things. Enjoy your stay.</description>
    <pubDate>Thu, 16 Apr 2026 23:53:05 -0300</pubDate>
    <item>
      <title>Writing D64 images to real floppies</title>
      <link>https://blog.marcg.pizza/marcg/writing-d64-images-to-real-floppies</link>
      <description>&lt;![CDATA[Writing D64 images to real floppies&#xA;&#xA;Hello everyone.&#xA;&#xA;When I started my #retrocomputing journey i knew that i would end up with a floppy drive at some point. Had to upgrade from tapes right? One thing i was always unsure of was would i be able to really put it to use. Well when i went looking for a drive i also looked for floppies. Luckily i did find some NOS floppies. Now i had to find a way to get some content on them. In comes the Pi1541. This lovely project turns a Raspberry Pi into a 1541 disk drive. It actually emulates the 1541 in a cycle perfect way. This changed everything for me. With this it was now like i had 2 1541 drives.&#xA;&#xA;So using VIC 2 disk backup i was now able to take a D64 disk image and write it to a real floppy. The software requires at least 16k of memory expansion. It can also use 24k. The way it works is actually quite simple. Here is what the software does. &#xA;&#xA;Prompts for a disk name and ID&#xA;Format the new disk.&#xA;Read in as many blocks as the available memory will allow&#xA;Write those blocks to the floppy.&#xA;&#xA;Repeat 3-4 till all blocks are copied.&#xA;&#xA;It works fairly well. I’ve not had it fail on me yet. I’ve captured a small but probably uninteresting video of the process.&#xA;&#xA;iframe width=&#34;560&#34; height=&#34;315&#34; sandbox=&#34;allow-same-origin allow-scripts allow-popups&#34; title=&#34;VIC20 2 Disk Backup&#34; src=&#34;https://spectra.video/videos/embed/f4c62fa5-f40e-4c33-869d-0292bfa22bb6&#34; frameborder=&#34;0&#34; allowfullscreen/iframe&#xA;&#xA;If you have a system compatible with the commodore 1541 disk drive you should get yourself a Pi1541. I can’t directly compare it to regular SD2IEC devices as i’ve not used those. But this thing works great. Now i can load DOOM from a real floppy (-:&#xA;&#xA;---&#xA;&#xA;Also just a little housekeeping. Its been a while since i posted again. Things are slowing down here and i might find myself with extra free time on my hands. That might turn into more posts again. I&#39;ll also acknowledge my failure to complete the 100 days to offload challenge. I&#39;m a little disappointed but at the same time it did get me to write more posts. If only for a short period of time.&#xA;&#xA;Well that&#39;s all for now&#xA;&#xA;Until next time. Stay safe!&#xD;&#xA;&#xD;&#xA;G&#xD;&#xA;@mgrondin@youdabomb.social]]&gt;</description>
      <content:encoded><![CDATA[<h3 id="writing-d64-images-to-real-floppies">Writing D64 images to real floppies</h3>

<p>Hello everyone.</p>

<p>When I started my <a href="/marcg/tag:retrocomputing" class="hashtag" rel="nofollow"><span>#</span><span class="p-category">retrocomputing</span></a> journey i knew that i would end up with a floppy drive at some point. Had to upgrade from tapes right? One thing i was always unsure of was would i be able to really put it to use. Well when i went looking for a drive i also looked for floppies. Luckily i did find some NOS floppies. Now i had to find a way to get some content on them. In comes the <a href="https://cbm-pi1541.firebaseapp.com/" rel="nofollow">Pi1541</a>. This lovely project turns a Raspberry Pi into a 1541 disk drive. It actually emulates the 1541 in a cycle perfect way. This changed everything for me. With this it was now like i had 2 1541 drives.</p>

<p>So using <a href="https://commodore.software/index.php?Itemid=126&catid=816&id=15556%3Avic20-two-disk-backup&option=com_jdownloads&view=download" rel="nofollow">VIC 2 disk backup</a> i was now able to take a D64 disk image and write it to a real floppy. The software requires at least 16k of memory expansion. It can also use 24k. The way it works is actually quite simple. Here is what the software does.</p>
<ol><li>Prompts for a disk name and ID</li>
<li>Format the new disk.</li>
<li>Read in as many blocks as the available memory will allow</li>
<li>Write those blocks to the floppy.</li></ol>

<p>Repeat 3-4 till all blocks are copied.</p>

<p>It works fairly well. I’ve not had it fail on me yet. I’ve captured a small but probably uninteresting video of the process.</p>

<iframe width="560" height="315" title="VIC20 2 Disk Backup" src="https://spectra.video/videos/embed/f4c62fa5-f40e-4c33-869d-0292bfa22bb6" frameborder="0" allowfullscreen=""></iframe>

<p>If you have a system compatible with the commodore 1541 disk drive you should get yourself a Pi1541. I can’t directly compare it to regular SD2IEC devices as i’ve not used those. But this thing works great. Now i can load DOOM from a real floppy (-:</p>

<hr>

<p>Also just a little housekeeping. Its been a while since i posted again. Things are slowing down here and i might find myself with extra free time on my hands. That might turn into more posts again. I&#39;ll also acknowledge my failure to complete the 100 days to offload challenge. I&#39;m a little disappointed but at the same time it did get me to write more posts. If only for a short period of time.</p>

<p>Well that&#39;s all for now</p>

<p>Until next time. Stay safe!</p>

<p>G
<a href="https://blog.marcg.pizza/@/mgrondin@youdabomb.social" class="u-url mention" rel="nofollow">@<span>mgrondin@youdabomb.social</span></a></p>
]]></content:encoded>
      <guid>https://blog.marcg.pizza/marcg/writing-d64-images-to-real-floppies</guid>
      <pubDate>Sun, 27 Jun 2021 13:13:53 -0300</pubDate>
    </item>
    <item>
      <title>### Back to the 80&#39;s AKA Got me a VIC-20 (#100DaysToOffload Day32)</title>
      <link>https://blog.marcg.pizza/marcg/back-to-the-80s-aka-got-me-a-vic-20-100daystooffload-day32</link>
      <description>&lt;![CDATA[### Back to the 80&#39;s AKA Got me a VIC-20 (#100DaysToOffload Day32)&#xA;&#xA;So this is something i have been wanting to get into for a while. #RetroComputing. I could never find the right listing at the right price. Well this time when i went looking all was right and i scored a (what i consider) mint condition VIC-20. Also got a tape drive for it, some educational software on tape and a couple cart games.&#xA;&#xA;See pics here&#xA;&#xA;So now what to do with this. Well i discovered that there is still an active community of people making games for this system so that&#39;s been fun. Downloading games and converting to a format that i can then record to cassette since that&#39;s the only way i have(for now) of getting things to/from the VIC. That&#39;s worked out pretty well so far. I have also found Compute Gazette on archive.org and have embarked on a semi quest of archiving the program listings from them. I&#39;ll document that better here some day but for now you can find .tap files of what I&#39;ve done here. I&#39;ll also post it all over on the Denial forum(linked above) under the games section.&#xA;&#xA;I have also made .tap files for the above mentioned educational software.&#xA;&#xA;That&#39;s all for now.&#xA;&#xA;Till next time. Be safe!&#xA;&#xA;@mgrondin@youdabomb.social&#xA;&#xA;Until next time. Stay safe!&#xD;&#xA;&#xD;&#xA;G&#xD;&#xA;@mgrondin@youdabomb.social]]&gt;</description>
      <content:encoded><![CDATA[<h3 id="back-to-the-80-s-aka-got-me-a-vic-20-100daystooffload-day32">Back to the 80&#39;s AKA Got me a VIC-20 (<a href="/marcg/tag:100DaysToOffload" class="hashtag" rel="nofollow"><span>#</span><span class="p-category">100DaysToOffload</span></a> Day32)</h3>

<p>So this is something i have been wanting to get into for a while. <a href="/marcg/tag:RetroComputing" class="hashtag" rel="nofollow"><span>#</span><span class="p-category">RetroComputing</span></a>. I could never find the right listing at the right price. Well this time when i went looking all was right and i scored a (what i consider) mint condition VIC-20. Also got a tape drive for it, some <a href="http://sleepingelephant.com/denial/wiki/index.php?title=CES-118_Geography_Book_I" rel="nofollow">educational software</a> on tape and a couple cart games.</p>

<p>See pics <a href="https://cloud.gcfam.net:8099/index.php/s/kYKywYJTdCD6ZGM" rel="nofollow">here</a></p>

<p>So now what to do with this. Well i discovered that there is still an <a href="http://sleepingelephant.com/denial" rel="nofollow">active community</a> of people making games for this system so that&#39;s been fun. Downloading games and converting to a format that i can then record to cassette since that&#39;s the only way i have(for now) of getting things to/from the VIC. That&#39;s worked out pretty well so far. I have also found Compute Gazette on archive.org and have embarked on a semi quest of archiving the program listings from them. I&#39;ll document that better here some day but for now you can find .tap files of what I&#39;ve done <a href="https://cloud.gcfam.net:8099/index.php/s/3CrxCzmZtpyaxke" rel="nofollow">here</a>. I&#39;ll also post it all over on the Denial forum(linked above) under the games section.</p>

<p>I have also made <a href="https://cloud.gcfam.net:8099/index.php/s/orfMJBp8kNsXic2" rel="nofollow">.tap files</a> for the above mentioned educational software.</p>

<p>That&#39;s all for now.</p>

<p>Till next time. Be safe!</p>

<p><a href="https://blog.marcg.pizza/@/mgrondin@youdabomb.social" class="u-url mention" rel="nofollow">@<span>mgrondin@youdabomb.social</span></a></p>

<p>Until next time. Stay safe!</p>

<p>G
<a href="https://blog.marcg.pizza/@/mgrondin@youdabomb.social" class="u-url mention" rel="nofollow">@<span>mgrondin@youdabomb.social</span></a></p>
]]></content:encoded>
      <guid>https://blog.marcg.pizza/marcg/back-to-the-80s-aka-got-me-a-vic-20-100daystooffload-day32</guid>
      <pubDate>Sun, 20 Dec 2020 14:34:43 -0400</pubDate>
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