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I remember running a Prolog IDE in UCS (Caxias) a long time ago. The IDE was freeware and the logo was a lion's head. I don't really remember its name anymore.

Found it. It was Arity Prolog.

So far I haven't made any videos with C++. I plan to shoot one with an object-oriented language, but I'm thinking Smalltalk.

I'm glad to hear it, hope your typewriter brings you joy. At this price range, it probably needs some love, like cleaning the typebars (I use turpentine and cotton swabs, wearing gloves and careful to avoid dripping on plastic parts; don't put any oil on it, it turns gunky over time). A new ribbon is also a good idea.

Hi, most versions of Merlin should be fine. In doubt, you can try Merlin Pro 2.43.

Thanks! I find most at the website of the Dutch Association for the History of Radio (NVHR): nvhr.nl/docs/schema/schematheek.php

Congrats! It's an elegant machine 🙂

You got it. The mini assembler is rudimentary and can't tell data from instructions. It will just try to disassemble everything as instructions. Very often you can ignore what comes after an RTS.

Thanks. I'm still around, currently working on a vacuum tube radio from the 1940s. Hopefully, the video will be ready in a few weeks. Meanwhile, I'm always ready to answer questions as they come🙂. Interaction keeps things interesting in YT, so I appreciate the welcome!

Indeed HEX is not an opcode in the 6502 instruction set but rather a Merlin assembler pseudo op. The Merlin manual defines them as "an instruction to the assembler rather than the processor being assembled for. A pseudo op may or may not result in bytes being placed into the program." Link to manual: gswv.apple2.org.za/a2zine/Docs/MerlinManual.txt

@@TacianoPerez super impressed you got back to me so fast. how would it look in straight assembly that you would enter in the mini assembler. Or is that some wierd thing no one would do?

I have an apple 2 e and 2c. That I’m following along with. I’m beyond thrilled that you have pulled back the veil on something that has stuck me as magic for so long. 😊 where can I get Merlin on floppy

@@andrewr5504 I made a short video explaining: th-cam.com/video/rq7hLt-IYNY/w-d-xo.html

@@andrewr5504 The best way to get a Merlin floppy is via asciiexpress.net/

Hi Luis, I used paleotronic.com/merlin/# . I literally copied and pasted the editor pane to a text file and vice-versa. If you have trouble because the buttons "Assemble" and "Exec" are failing with an expired certificate error (which can be seen at the browser's console with ctrl+shift+i) please check my answer to your other comment. Let me know if that answers your question!

Hi Luis, for me it still results in an ERR_CERT_DATE_INVALID when clicking the "Assemble" and "Execute" buttons. The only workaround that works for me is: first went to "turtlespaces.org:6502/api/v1/asm/multifile%20net::ERR_CERT_DATE_INVALID" to see the "Not Secure" badge on Chrome's address bar. Then followed the steps described here: www.pico.net/kb/how-do-you-get-chrome-to-accept-a-self-signed-certificate/. After restarting Chrome, I went back to the insecure URL above and clicked "advanced", "proceed to..." and "reload".

Thanks! Let me know if there's a particular old school game that you'd like to see converted :-).

Thanks for sharing! We learned a lot from these first domestic computers as they were simple enough that one could wrap one's mind around the whole HW-SW stack (although I personally struggled with assembly as a kid :-) ). This keeps them relevant even today.

@@TacianoPerez I thought I knew the Atari 8-bit machines inside and out (this was back in the early 1980's). Then, earlier this year, someone in the Facebook Atari group mentioned some games written by Polish programmers. It turns out they were very popular in Poland. Anyway, I looked on TH-cam for a demo of the games and when I found it, it blew me away. They used a technique I never heard of that allowed them to put more than 4 sprites on a display list graphics area AND made them multi-colored. I asked and they said the used something called ray tracing. It turns out, this technique was used quite often on the Atari 2600 because it only had 2 sprites. I guess one's never too old to learn.

@@bjbell52 True that! If you still have the link to these videos, I'd be curious in taking a look...

@@TacianoPerez I replied to your last post and gave a link to the book about Atari video game programming. Somehow, that post is now missing. So - use Google to find the book named Atari Graphics and Arcade Design. Change "Atari" to "Apple" in your search to see the other book. Also, search TH-cam for Atari 8-bit video games Poland to see some of their games.

Thanks! I used 1K resistors. I took inspiration from this video (you can see the schematic around the 5 min mark): th-cam.com/video/rBITfrbDbbI/w-d-xo.html&ab_channel=AntiqueRadioArcheology-WilliamMorris

Red is gorgeous too :-).

True, that was a huge step.

That's cool! What kind of RPG would you like to make? Do you already have some ideas?

Hi Tallison, yes, I'm Brazilian. My first computer was a Tk3000 IIe in the late 80s, a clone of the Apple IIe platinum manufactured by Microdigital Eletrônica.

Happy to hear it! 😁

That makes sense. Still, it seemed to me the easiest way to get a PSU with ground isolated from the radio. It's probably okay if the BT module works for a decade or two, since by then we're likely to be using some other protocol for audio devices. There's some interesting videos from Electronics Old and New about how to supply the BT module by adding a new winding to the radio's power trafo (th-cam.com/video/eWfsWNUpSNs/w-d-xo.htmlsi=1NVTFHwa5PjrME6d) or from the magic eye circuit (th-cam.com/video/TeoWENXwcWs/w-d-xo.htmlsi=gl6BpXF-ak7jAiHA), but I thought they would be overkill for my case. How would you do it?

Hi Patrick, in this case it was 330 ohms. Usually I start at around 100 ohms and play with the values until the desired output voltage. I like this article by Rich Bonkowski: w5rkl.com/wp-content/uploads/2022/07/RBSelenium2.pdf

@@TacianoPerez , thank you for the information!. Saved it in my tech library.

Happy to hear it! It's never too late for a good new text adventure. I would love to play it 🙂

Indeed testing for continuity tells you whether any of the windings are open, but says nothing about efficiency. Another approach is to introduce a low-voltage signal on the primary (e.g. 1V@50Hz) and check the secondary voltage output for the desired ratio. There's a great video by M Caldeira (Electronics Old and New) explaining: th-cam.com/video/7xvTGd4ysRE/w-d-xo.html&ab_channel=ElectronicsOldandNewbyMCaldeira . Thanks for the question, much appreciated!

That’s nice to hear, thanks!!

Me too, they have a big, warm sound much better than transistor equipment (at least to my ears.)

@TacianoPerez I agree all the way. I repaired a 1950s magnavox console and wow... has a 15 and 12 inch woofer. I almost don't believe the sound it outputs and frequencies it can get to.

@@speakeradventures I have an output transformerless Philips B5X63A in my restoration queue. Apparently they have a wider dynamic range than traditional radios with an output trafo. Looking forward to that one!

@TacianoPerez huh, that's interesting, transformerless..is it a hot chassis set then..I just looked that radio up..love it. Any radio with dual speakers immediately peeks my interest as I love speakers. I bet it will have beautiful sound. Never seen that fabric on the back of a speaker before. Will be neat to see that retorted.

Hello there, the problem seems to be that ASSEMBLE and EXEC make a call to turtlespaces.org:6502, and that fails with an ERR_CERT_DATE_INVALID error. In the past I was able to work around it by running Chrome with some special flags, or importing the turtlespaces.org certificate to Chrome trusted certs. But now these tricks don't seem to work anymore :-(. If you figure out a new workaround, please let me know...

It does sound easier indeed, I wish I had thought of that...🙂 Thanks!

Verdade, Nicolas!

Hi there! I've made a video for you: th-cam.com/video/NQnxwjTrYpw/w-d-xo.html

Obrigado!!!

I could definitely make something, do you have anything specific in mind?

@@TacianoPerez I made some new commands for the text screen and the graphic screen like a CENTER command for the text screen and a bresenham line command for the graphic screen. But i am not so good in math. I do not understand how to make 3D graphic, i use only 2D formular. For pictures i use the TGA (uncompressed) picture format. I never learn how to decode other format like JPG, GIF or BMP picture format. I failed to build a routine to play WAV sound files. So there is a lot of work to do. I made some videos to show my work for DosBox. But i am not familar with the C language. I use x86 assembly and i put all instructions to create new executable inside batch files. Feel free to use my work in your projects and have fun.

That’s cool! Is it shared somewhere, like GitHub?

@@TacianoPerez I made a video for it. Please take a look into my pinned comment.

@@maxmuster7003 I've checked your video, and I really like the concept. The art (colors, images, sounds, story) is great!

I made an other video that shows how to make 1 bit Pixel Art animation. Have fun! 😊

I can give it a try, could you share more details?

It would be interesting if you could teach how to build or compile a github project, there are 3D Engines or Minecraft 3D etc. 😊🙏

@@ge0rg3_3 I've googled around but couldn't find an Minecraft or 3D engine project in Turbo C++ that seemed to fit your interest. Could you point me to an existing project, e.g. in GitHub?

Thanks, Alan!

Sono felice di sentirlo! È davvero molto divertente. Condividi con noi ciò che farai...

For anyone else, you can click the link causing the CORS issues in the console, accept the cert or add an exception, then the site will start to work

@@chaseforchrist I was wondering when someone else would notice :-). Indeed it seems that Paleotronic's certificate has expired, and the website hasn't been actively maintained in the past year or so. In my case, I have been starting Chrome with the flag "--ignore-certificate-errors", but of course one must then be cautious to open only trusted websites.

BTW, recently the "--ignore-certificate-errors" option stopped working after a Chrome update. I have added the certificate of turtlespaces.org/ to my trusted certs, and now I can work with it. It's definitely less insecure than the "ignore certificates" option.