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OlimexRetro Computing Nostalgia meet Open Source Software and Hardware with AgonLight and Neo6502, the incredible evolution of modern Retro computer projects <a href="https://olimex.wordpress.com/2025/07/23/retro-computing-nostalgia-meet-open-source-software-and-hardware/" rel="nofollow noopener" translate="no" target="_blank">https://olimex.wordpress.com/2025/07/23/retro-computing-nostalgia-meet-open-source-software-and-hardware/</a> <a href="https://mastodon.social/tags/z80" class="mention hashtag" rel="nofollow noopener" target="_blank">#z80</a> <a href="https://mastodon.social/tags/w65c02" class="mention hashtag" rel="nofollow noopener" target="_blank">#w65c02</a> <a href="https://mastodon.social/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrocomputing</a> <a href="https://mastodon.social/tags/retrogaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrogaming</a> <a href="https://mastodon.social/tags/pascal" class="mention hashtag" rel="nofollow noopener" target="_blank">#pascal</a> <a href="https://mastodon.social/tags/cpm" class="mention hashtag" rel="nofollow noopener" target="_blank">#cpm</a> <a href="https://mastodon.social/tags/forth" class="mention hashtag" rel="nofollow noopener" target="_blank">#forth</a> <a href="https://mastodon.social/tags/basic" class="mention hashtag" rel="nofollow noopener" target="_blank">#basic</a> <a href="https://mastodon.social/tags/cc65" class="mention hashtag" rel="nofollow noopener" target="_blank">#cc65</a>

Karsten SchmidtMemoirs of the CP/M creator released:“Our father, Gary Kildall, was one of the founders of the personal computer industry, but you probably don’t know his name. Those who have heard of him may recall the myth that he ‘missed’ the opportunity to become Bill Gates by going flying instead of meeting with IBM. Unfortunately, this tall tale paints Gary as a ‘could-have-been,’ ignores his deep contributions, and overshadows his role as an inventor of key technologies that define how computer platforms run today.Gary viewed computers as learning tools rather than profit engines. His career choices reflect a different definition of success, where innovation means sharing ideas, letting passion drive your work and making source code available for others to build upon. His work ethic during the 1970s resembles that of the open-source community today."<a href="https://computerhistory.org/blog/in-his-own-words-gary-kildall/" rel="nofollow noopener" translate="no" target="_blank">https://computerhistory.org/blog/in-his-own-words-gary-kildall/</a><a href="https://mastodon.thi.ng/tags/ComputerHistory" class="mention hashtag" rel="nofollow noopener" target="_blank">#ComputerHistory</a> <a href="https://mastodon.thi.ng/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://mastodon.thi.ng/tags/PersonalComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#PersonalComputing</a> <a href="https://mastodon.thi.ng/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a>

Nils M HolmA few weeks ago I wondered what it takes to turn a small LISP-1 into a LISP-2. Turns out it takes just a few hours to get most things right, then some days to iron out a few subtleties, and then a couple of weeks to polish it into a piece of art. MICRO COMMON LISP is a tiny, purely symbolic, microscopic subset of <a href="https://mastodon.social/tags/CommonLISP" class="mention hashtag" rel="nofollow noopener" target="_blank">#CommonLISP</a>. It runs in less than 64K bytes of memory, even on <a href="https://mastodon.social/tags/DOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#DOS</a> (tiny model) or CP/M. Here it is: <a href="http://t3x.org/mcl/" rel="nofollow noopener" translate="no" target="_blank">http://t3x.org/mcl/</a> <a href="https://mastodon.social/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://mastodon.social/tags/LISP" class="mention hashtag" rel="nofollow noopener" target="_blank">#LISP</a>

Martin Maciaszek :commodore:Code indentation in the 70ies was wild! <a href="https://maciaszek.social/tags/cpm" class="mention hashtag" rel="nofollow noopener" target="_blank">#cpm</a> <a href="https://maciaszek.social/tags/pli" class="mention hashtag" rel="nofollow noopener" target="_blank">#pli</a> <a href="https://maciaszek.social/tags/programming" class="mention hashtag" rel="nofollow noopener" target="_blank">#programming</a> <a href="https://maciaszek.social/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrocomputing</a>

Nils M HolmThe Mini <a href="https://mastodon.social/tags/CommonLISP" class="mention hashtag" rel="nofollow noopener" target="_blank">#CommonLISP</a> I have been working on now runs on CP/M with 2416 free cons cells. Enough to load Ken Kahn's tiny PROLOG and run a few simple queries. The <a href="https://mastodon.social/tags/AgonLight" class="mention hashtag" rel="nofollow noopener" target="_blank">#AgonLight</a> (18MHz eZ80) loads the LISP part of the code (236 lines) in 11 seconds. Simple programs run at acceptable speed, but slightly more complex PROLOG queries take *minutes*. :) <a href="https://mastodon.social/tags/LISP" class="mention hashtag" rel="nofollow noopener" target="_blank">#LISP</a> <a href="https://mastodon.social/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://mastodon.social/tags/PROLOG" class="mention hashtag" rel="nofollow noopener" target="_blank">#PROLOG</a> <a href="https://mastodon.social/tags/Z80" class="mention hashtag" rel="nofollow noopener" target="_blank">#Z80</a>

tom jennings<a href="https://tldr.nettime.org/tags/cpm" class="mention hashtag" rel="nofollow noopener" target="_blank">#cpm</a> <a href="https://tldr.nettime.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrocomputing</a> Has anyone come across runnable binaries of SUPERCALC for CP/M? Very hard to find.Looking for any usable spreadsheet program for CP/M, actually... MULTIPLAN, SUPERCALC, there was a VISICALC CP/M release but it's probably scarce.(How sad it is, to see all of these short-sighted "disk imaging" systems to encapsulate obsolete software, but that require using legacy hardware, or weird handmade hardware designed 30 years ago that are as hard to come up with as the original hardware, only 20 years newer! Just preserve the files! Sheesh!)

@Rp12Biker :verified:The little <a href="https://oldbytes.space/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://oldbytes.space/tags/workstation" class="mention hashtag" rel="nofollow noopener" target="_blank">#workstation</a> is finished. My evening work consisted of packing it in a nice case and starting the backplane soldering. But there are still plenty of soldering points left, I'll have to do that tomorrow as well.Do any of you <a href="https://oldbytes.space/tags/Pascal" class="mention hashtag" rel="nofollow noopener" target="_blank">#Pascal</a> nerds knows a source for porting <a href="https://oldbytes.space/tags/Eliza" class="mention hashtag" rel="nofollow noopener" target="_blank">#Eliza</a> to <a href="https://oldbytes.space/tags/TurboPascal3" class="mention hashtag" rel="nofollow noopener" target="_blank">#TurboPascal3</a>, the first good Turing test in <a href="https://oldbytes.space/tags/BASIC" class="mention hashtag" rel="nofollow noopener" target="_blank">#BASIC</a>? <a href="https://oldbytes.space/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://oldbytes.space/tags/ZilogZ180" class="mention hashtag" rel="nofollow noopener" target="_blank">#ZilogZ180</a> <a href="https://oldbytes.space/tags/SC126" class="mention hashtag" rel="nofollow noopener" target="_blank">#SC126</a>

@Rp12Biker :verified:Playing around with a PROFILE.SUB and the SUBMIT command to get a kind of AUTOEXEC.BAT under <a href="https://oldbytes.space/tags/CPM2" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM2</a>. It makes a lot of fun to play with such an old technique and shows how restless our time has become. <a href="https://oldbytes.space/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://oldbytes.space/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://oldbytes.space/tags/ZilogZ180" class="mention hashtag" rel="nofollow noopener" target="_blank">#ZilogZ180</a>

Paolo Amoroso☝️ <a href="https://oldbytes.space/@bitsavers" class="u-url mention" rel="nofollow noopener" target="_blank">@bitsavers</a> has just posted yet another computing history treasure: the scans of the original Digital Research listings of the sources of CP/M 2.2, CP/M Plus 3.0, CP/M-86, and Concurrent CP/M-86 in Intel 8080 Assembly, PL/M, and Intel 8086 Assembly.<a href="http://www.bitsavers.org/pdf/digitalResearch/CPM_Listings/" rel="nofollow noopener" translate="no" target="_blank">http://www.bitsavers.org/pdf/digitalResearch/CPM_Listings/</a><a href="https://oldbytes.space/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrocomputing</a> <a href="https://oldbytes.space/tags/cpm" class="mention hashtag" rel="nofollow noopener" target="_blank">#cpm</a> <a href="https://oldbytes.space/tags/intel8080" class="mention hashtag" rel="nofollow noopener" target="_blank">#intel8080</a> <a href="https://oldbytes.space/tags/x86" class="mention hashtag" rel="nofollow noopener" target="_blank">#x86</a>

@Rp12Biker :verified:Most of the work for the <a href="https://oldbytes.space/tags/RC2014" class="mention hashtag" rel="nofollow noopener" target="_blank">#RC2014</a> machine based on the <a href="https://oldbytes.space/tags/Zilog" class="mention hashtag" rel="nofollow noopener" target="_blank">#Zilog</a> higher integrated <a href="https://oldbytes.space/tags/Z180" class="mention hashtag" rel="nofollow noopener" target="_blank">#Z180</a> CPU is done. The two 90° card connectors are final work for tomorrow afternoon. All parts were available from my private stock, except the 74AHCT139 for the RAM card. The circuits are, as ever, highly quality from pcb4diy. <a href="https://oldbytes.space/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://oldbytes.space/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a>

eiZen- Bonus section -Japanese FORTRAN Handbook Æsthetics<a href="https://mastodon.sdf.org/tags/Japanese" class="mention hashtag" rel="nofollow noopener" target="_blank">#Japanese</a> <a href="https://mastodon.sdf.org/tags/RetroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroTech</a> <a href="https://mastodon.sdf.org/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://mastodon.sdf.org/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://mastodon.sdf.org/tags/Typography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Typography</a>10/10 - E.O.F.

eiZenJapanese CP/M Handbook Æsthetics<a href="https://mastodon.sdf.org/tags/Japanese" class="mention hashtag" rel="nofollow noopener" target="_blank">#Japanese</a> <a href="https://mastodon.sdf.org/tags/RetroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroTech</a> <a href="https://mastodon.sdf.org/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://mastodon.sdf.org/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://mastodon.sdf.org/tags/Typography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Typography</a>8/

eiZenÆsthetics turned up to 11.Japanese CP/M handbook visuals were peak future.My brain feels Gundam, Bladerunner, Tetsuo and Retrocomputing in one go.Some highlights for your timeline...<a href="https://mastodon.sdf.org/tags/Japanese" class="mention hashtag" rel="nofollow noopener" target="_blank">#Japanese</a> <a href="https://mastodon.sdf.org/tags/RetroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroTech</a> <a href="https://mastodon.sdf.org/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> <a href="https://mastodon.sdf.org/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://mastodon.sdf.org/tags/Typography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Typography</a>1/

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