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#a1200

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Jan Beta<p>New video! Testing the new mechanical Amiga 1200 replacement keyboard from AmigaStore.</p><p>YouTube: <a href="https://youtu.be/BKkBesUKZwE" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/BKkBesUKZwE</span><span class="invisible"></span></a><br>PeerTube: <a href="https://makertube.net/w/u5ks6rXXhR8aEFP5MhjWs9" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">makertube.net/w/u5ks6rXXhR8aEF</span><span class="invisible">P5MhjWs9</span></a></p><p><a href="https://chaos.social/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> <a href="https://chaos.social/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> <a href="https://chaos.social/tags/Amiga1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga1200</span></a> <a href="https://chaos.social/tags/Keyboard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Keyboard</span></a> <a href="https://chaos.social/tags/AmigaStore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AmigaStore</span></a> <a href="https://chaos.social/tags/MechnicalKeyboard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MechnicalKeyboard</span></a> <a href="https://chaos.social/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RetroComputing</span></a> <a href="https://chaos.social/tags/VintageComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>VintageComputing</span></a></p>
Matthias Rochow / ooRay<p>1992 was the year of the nerds. They got to play with Alice, Denise and Paula, all at the same time. <a href="https://mograph.social/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a></p>
Stefaan Henninck 🕹️🎥🍿🍺<p>Things I learned while bringing my <a href="https://social.linux.pizza/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> 500 to the current age: The whole <a href="https://social.linux.pizza/tags/AGA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AGA</span></a> shtick is but a wax nose... when you install a more performant CPU and 3.2 ROM, in this case with a <a href="https://social.linux.pizza/tags/PiStorm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PiStorm</span></a>, the colors you're missing from the <a href="https://social.linux.pizza/tags/AGA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AGA</span></a> upgrade from the <a href="https://social.linux.pizza/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a>, is negligible. Games played with WHDload are just as enjoyable and the music is equally fine.</p>
Amiga4000T<p>A warmed up composition of my working A1200 Amiga computer, never used because my A4000T blow the socks of this one</p><p>The A4000T has a Cyberstorm060 accellerator on it with 128GB local ram while there is 2X8GB ram on the main board</p><p>The Picasso96 accelerator of the A4000T died which I why I stopped using it</p><p><a href="https://c.im/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RetroComputing</span></a> <a href="https://c.im/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> <a href="https://c.im/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> <a href="https://c.im/tags/Workbench" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Workbench</span></a></p>
DeFrisselle ☑️<p>Amiga Meanwell PSU Conversion </p><p><a href="https://youtu.be/-EHApEvq1YI" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/-EHApEvq1YI</span><span class="invisible"></span></a></p><p><a href="https://mastodon.sdf.org/tags/Retogameing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Retogameing</span></a> <a href="https://mastodon.sdf.org/tags/Retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Retrocomputing</span></a> <br><a href="https://mastodon.sdf.org/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> <a href="https://mastodon.sdf.org/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> <a href="https://mastodon.sdf.org/tags/Meanwell" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Meanwell</span></a> <a href="https://mastodon.sdf.org/tags/PSU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PSU</span></a></p>
Chaosthief<p>The PCMCIA adapter arrived and I can finally get files onto the A1200. (Non of my floppy drives could format 720k properly &gt;.&lt;)</p><p>Happy to report: Traces works :D</p><p>Here is a screen capture of the first render from this 32 year old machine.</p><p><a href="https://mastodon.art/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> <a href="https://mastodon.art/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodon.art/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a></p>
LukHash<p>Finally got around to completing these two <a href="https://mastodon.social/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> mods I’ve been meaning to tackle for years. Presenting the "Purple <a href="https://mastodon.social/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a>💜" and limited edition "Red SkidRow A1200❤️". Both ready for retro gaming and music making. Pretty pleased with how these turned out! 😍</p>
Filip M. Nowak<p><span class="h-card" translate="no"><a href="https://techhub.social/@dfx" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>dfx</span></a></span> similar feelings, though i never had a legal copy of my favorite editor i was using on <a href="https://mastodon.social/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodon.social/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> as a kid. i've fixed this issue recently :)</p>
Peter Gordon ✅️<p>Happy Birthday to meeeeeeee! 😁</p><p><a href="https://mastodon.social/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodon.social/tags/amiga1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga1200</span></a> <a href="https://mastodon.social/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> <a href="https://mastodon.social/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> <a href="https://mastodon.social/tags/commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>commodore</span></a> <a href="https://mastodon.social/tags/commodoreamiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>commodoreamiga</span></a></p>
XAct_6510<p>Finally some time again for my <a href="https://oldbytes.space/tags/Commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Commodore</span></a> <a href="https://oldbytes.space/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> Recapping of the <a href="https://oldbytes.space/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> which I want to keep as original as possible - Check! The keyboard membrane has to be replaced and the floppy drive doesn't work (despite ESCOM-fix)</p>
yawning_angel<p>The final upgrade has been added to the <a href="https://mastodonapp.uk/tags/backinblack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>backinblack</span></a> Amiga - a sexy new badge. <br>The machine is complete. 😎</p><p><a href="https://mastodonapp.uk/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodonapp.uk/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> <a href="https://mastodonapp.uk/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a></p>
yawning_angel<p>OMG! This game... on this system... I mean... WOW! 😱<br>Twin stick joy. 😎</p><p>Thank you <span class="h-card" translate="no"><a href="https://mas.to/@h0ffman" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>h0ffman</span></a></span> - this is sheer quality! 👍</p><p><a href="https://mastodonapp.uk/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodonapp.uk/tags/cecconoid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cecconoid</span></a> <a href="https://mastodonapp.uk/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> <a href="https://mastodonapp.uk/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> <a href="https://mastodonapp.uk/tags/backinblack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>backinblack</span></a></p>
yawning_angel<p>Right! Time to fire up Cecconoid by <span class="h-card" translate="no"><a href="https://mas.to/@h0ffman" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>h0ffman</span></a></span> on my <a href="https://mastodonapp.uk/tags/backinblackamiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>backinblackamiga</span></a> 😈. Seems fitting given the design of the game. 😎</p><p><a href="https://mastodonapp.uk/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodonapp.uk/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> <a href="https://mastodonapp.uk/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a></p>
yawning_angel<p>Another Amiga Hardware video from me? 😱<br>In this one I fit a GoDrive to my <a href="https://mastodonapp.uk/tags/backinblack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>backinblack</span></a> Amiga A1200. </p><p>Was this a success and is it better than a GoTek? 🤔</p><p><a href="https://youtu.be/Mo9OuaVnpMA" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/Mo9OuaVnpMA</span><span class="invisible"></span></a></p><p><a href="https://mastodonapp.uk/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodonapp.uk/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> <a href="https://mastodonapp.uk/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> <a href="https://mastodonapp.uk/tags/godrive" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>godrive</span></a></p>
:rss: Hacker News<p>Doom didn't kill the Amiga. Wolfenstein 3D did [video]<br><a href="https://www.youtube.com/watch?v=wsADJa-23Sg" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=wsADJa-23S</span><span class="invisible">g</span></a><br><a href="https://rss-mstdn.studiofreesia.com/tags/ycombinator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ycombinator</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/amiga_500" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga_500</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/best_amiga_games" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>best_amiga_games</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/wolf3d" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>wolf3d</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/wolfenstein_3d" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>wolfenstein_3d</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/wolf" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>wolf</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/doom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>doom</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/id_software" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>id_software</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/fps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fps</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/amiga_fps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga_fps</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/killed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>killed</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/mvg" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mvg</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/modern_vintage_gamer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>modern_vintage_gamer</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/chunky" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>chunky</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/vga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>vga</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/ibm_pc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ibm_pc</span></a> #286 #386 #68030 #68040 <a href="https://rss-mstdn.studiofreesia.com/tags/cpu" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cpu</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/texture_mapping" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>texture_mapping</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/raycasting" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>raycasting</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>commodore</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/kickstart" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>kickstart</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/wolfenstein" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>wolfenstein</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/accelerator_card" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>accelerator_card</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/amiga_1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga_1200</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/aga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>aga</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/planar" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>planar</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/bitplanes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>bitplanes</span></a> <a href="https://rss-mstdn.studiofreesia.com/tags/c2p" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>c2p</span></a></p>
yawning_angel<p>The story of my ‘new’ Amiga and how I modded it. Yes, the <a href="https://mastodonapp.uk/tags/backinblack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>backinblack</span></a> Amiga lives. 
Watch the video of its creation… 😱🧛🏻</p><p>(Yes, it’s a ‘hardware’ video from me, so expect ‘issues’. 😅)</p><p><a href="https://youtu.be/PZWQtnI4c64" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/PZWQtnI4c64</span><span class="invisible"></span></a></p><p><a href="https://mastodonapp.uk/tags/amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>amiga</span></a> <a href="https://mastodonapp.uk/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> <a href="https://mastodonapp.uk/tags/a1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>a1200</span></a> <a href="https://mastodonapp.uk/tags/itlives" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>itlives</span></a></p>
Jan Beta<p>New video! I'm trying to figure out what the Amiga 1200 expansion board from my previous video actually is and then hopefully get it to work.</p><p>YouTube: <a href="https://youtu.be/amLo8bR6XQ0" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/amLo8bR6XQ0</span><span class="invisible"></span></a><br>PeerTube: <a href="https://makertube.net/w/gVB55bnRjcuVZxxwfxfKfn" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">makertube.net/w/gVB55bnRjcuVZx</span><span class="invisible">xwfxfKfn</span></a></p><p><a href="https://chaos.social/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> <a href="https://chaos.social/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> <a href="https://chaos.social/tags/Amiga1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga1200</span></a> <a href="https://chaos.social/tags/Expansion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Expansion</span></a> <a href="https://chaos.social/tags/Commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Commodore</span></a> <a href="https://chaos.social/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RetroComputing</span></a> <a href="https://chaos.social/tags/VintageComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>VintageComputing</span></a></p>
Jan Beta<p>New video! I'm trying to transform the "lost cause" Amiga 1200 from the previous video into a full computer using spare parts from my stash.</p><p>YouTube: <a href="https://youtu.be/1K4TpMQW-jI" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/1K4TpMQW-jI</span><span class="invisible"></span></a><br>PeerTube: <a href="https://makertube.net/w/fcwW4wNCMRui8U34dgbBAX" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">makertube.net/w/fcwW4wNCMRui8U</span><span class="invisible">34dgbBAX</span></a></p><p><a href="https://chaos.social/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> <a href="https://chaos.social/tags/Commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Commodore</span></a> <a href="https://chaos.social/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RetroComputing</span></a> <a href="https://chaos.social/tags/VintageComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>VintageComputing</span></a> <a href="https://chaos.social/tags/Retrobright" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Retrobright</span></a> <a href="https://chaos.social/tags/Refurb" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Refurb</span></a> <a href="https://chaos.social/tags/Restoration" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Restoration</span></a> <a href="https://chaos.social/tags/Amiga1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga1200</span></a> <a href="https://chaos.social/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a></p>
XAct_6510<p>Hellorld! This is a test posting from my <a href="https://oldbytes.space/tags/Commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Commodore</span></a> <a href="https://oldbytes.space/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> <a href="https://oldbytes.space/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> using the <a href="https://oldbytes.space/tags/Amidon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amidon</span></a> <a href="https://oldbytes.space/tags/Mastodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mastodon</span></a> client. I´m curious if it works...</p>
Harry Sintonen<p><a href="https://infosec.exchange/tags/Amiga" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga</span></a> world first: Executing code in hardware color registers!</p><p>In 1992 <a href="https://infosec.exchange/tags/Commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Commodore</span></a> Amiga AGA chipset introduced a new control bit RDRAM to BPLCON2 hardware register. The bit specification says “Causes color table address to read the color table instead of writing to it”. Even before I got my <a href="https://infosec.exchange/tags/A1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>A1200</span></a> in 1995 I wondered if I could perhaps store code in the color registers and outright jump to the register address to execute it. Back in the day the problem I ran into was that unfortunately the registers only store the lowest 12-bits and bit 15 of the written values – the other upper bits are all 0. Considering the 68k instruction set, this severely limits the possible instructions that can be used: for example there is no way to affect the control flow (branch or return from subroutine).</p><p>Last evening while participating to Amiga cracking Twitch stream by <span class="h-card" translate="no"><a href="https://mas.to/@h0ffman" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>h0ffman</span></a></span> I remembered this hack and the problems I ran into, and had an epiphany: I could trigger an exception to exit the code flow. I just need to find an opcode that I can present with only lower 12-bits to trigger an exception. As a solution, 16-bit word 0x0fff causes an illegal instruction vector (number 4) to be taken, from which I can then reroute the execution safely back to outside of the color registers.</p><p>The actual implementation was only 15 min hack job. The only hitch is that unfortunately the venerable UAE emulator does not play ball at all, and outright hangs when the code execution in color registers is attempted. However, I correctly guessed that this was an omission in the emulation rather than actual issue in my design. This was proven by <span class="h-card" translate="no"><a href="https://mastodontti.fi/@pyksy" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>pyksy</span></a></span> successfully executing the test program on his actual <a href="https://infosec.exchange/tags/Amiga1200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Amiga1200</span></a> with the expected results (see the photo).</p><p>“But for the love of all that’s holy, why!?”, I hear you cry. Because <a href="https://infosec.exchange/tags/hacking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hacking</span></a> and <a href="https://infosec.exchange/tags/retrocomputers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputers</span></a> are cool, that’s why. Also it’s quite neat to get definite confirmation for a theory you first thought about nearly 30 years ago.</p><p>• Amiga Hardware Reference Manual: <a href="http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0000.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">http://</span><span class="ellipsis">amigadev.elowar.com/read/ADCD_</span><span class="invisible">2.1/Hardware_Manual_guide/node0000.html</span></a><br>• BPLCON2: <a href="http://amiga-dev.wikidot.com/hardware:bplcon2" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">http://</span><span class="ellipsis">amiga-dev.wikidot.com/hardware</span><span class="invisible">:bplcon2</span></a><br>• Motorola M68000 Family Programmer’s Reference Manual: <a href="https://www.nxp.com/docs/en/reference-manual/M68000PRM.pdf" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">nxp.com/docs/en/reference-manu</span><span class="invisible">al/M68000PRM.pdf</span></a><br>• Hack source code: <a href="https://sintonen.fi/src/colexec/colexec.asm" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">sintonen.fi/src/colexec/colexe</span><span class="invisible">c.asm</span></a><br>• Amiga Cracking by Hoffman: <a href="https://www.youtube.com/playlist?list=PLFL-EKU6hI3oPINUeXchGYHCc_t-GnsZ5" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/playlist?list=PLFL</span><span class="invisible">-EKU6hI3oPINUeXchGYHCc_t-GnsZ5</span></a><br><a href="https://infosec.exchange/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> <a href="https://infosec.exchange/tags/hack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hack</span></a></p>