Shachar Shemesh

Just like about everyone else, I, too, opened a Mastodon account. Feel free to give me a follow there: @compusar@fosstodon.org @compusar" target="_blank" rel="nofollow noopener">fosstodon.org/@compusar

Ever wondered what goes into getting data off of your SD card? Well too bad, you're going to hear about it anyways. A new video is up with random pieces of information on the SD protocol and history. youtu.be/GxeoCp1ewuo

Can AI replace programmers? As in, completely replace? I have an answer... in the form of a 20 minutes video. youtu.be/5GBLLMszPxs

it might have missed the break on line 90 (in which case the loop's condition means that if the loop has exited, the if must be taken). As far as I can tell, this is legal C++, which means this is a bug in the compiler. I would love the input of other people to confirm

I can think of two (wrong) assumptions the compiler might make to lead to this. It might assume timerQueue is a local var (and thus, changing it from placeTimerEvent would be UB), or

The code in the picture is a timer interrupt handler. It gets the timer events from a global timerQueue. It seems that the condition on line 100 is not processed correctly. It calls "reset_timer_cycles" even if the call to "placeTimerEvent" added the event back into the queue

Did you know that the Apple II's display memory jumps all over the place? Have you ever wondered why? In this newest video I answer that. And, no, the memory refresh is not the reason. youtu.be/HIuuxUc3nCk

@r0ktech Neither. The best is: try { volatile b = 15/a; return false; } catch(MathException) { return true; }

as a developer, which one do you prefer ?

I'm building an Apple II clone on an FPGA board. I finally got text mode over HDMI working. There's a video up about this. And that's all, really. youtu.be/BzKzyDRaGww

@ChShersh @quadrawin If we didn't have C, we'd all still be writing in Basi, Pasal and Obol.

@quadrawin But not the opposite. If you remove C from GC, you get only G, which stands for Garbage.

Huge news! After 38 years, C++23 finally removes Garbage Collection from C++

@JBrooksBSI No, it just says I haven't implemented that part *yet*. In fact, I specifically say I don't want a frame buffer, partly because of the latency it introduces.

@ShacharShemesh Oh, I thought early in your video you had a diagram where the AppleII video was planned to be eliminated by migrating AppleII pixels to a unified HDMI output.

Hurray! A new video is up. After 3 years of constantly thinking it's just around the corner, I finally got HDMI output working. And without using a frame buffer*! * - for some definition of "frame buffer". youtu.be/H_KDwbn5FYw

@JBrooksBSI Oh, no. That Apple II side will have 100% authentic(ish) display, converting the Apple memory directly into pixels. All that I've discussed is the frame buffer for the RISC-V. The display is two controllers, both converting memory into pixels, and a component that merges them

@ShacharShemesh Very nice! I too tried 32-bit pixel HDMI for my AppleII VidHD card in 2018, but the DDR bandwidth was too high. I dropped back to 16-bit A1R5G5B5. Your 8-bit pixel is even better, but HGR/DHGR artifact colors might need more bits, especially at higher resolutions. Keep going!

@iyoushetwt My first three were: Applesoft Basic 6502 Assembly C (K&R version)

What was the first programming language you learned ? Mine : C++

A video is up for a C++now talk I attended in person. I skim through it. At some point the speaker, @linusbm, shows a graph and explain spikes in performance. Current me has a question, but that's okay, because original me asked the exact same question. youtube.com/watch?v=KFe6LC…

A new video is up, in which I speak Chinese. Oh, and I also may or may not talk about PCB traces zigzagging, as well as how difficult it is to time DDR signals. But mostly, Chinese. youtu.be/Js6-K9lFsYw

@cppnow And here's the actual session, for those interested. youtube.com/watch?v=HHgyH3…

C++Now 2025 SESSION ANNOUNCEMENT: Undefined Behavior From the Compiler’s Perspective by @ShacharShemesh schedule.cppnow.org/session/2025/u… Register now at cppnow.org/registration/ #Compiler #Undefinedbehaviour

@halvarflake For a moment there I thought my German is much worse than I thought, until Google Translate said it was Dutch.

Keeping America safe?

@gadievron If you've only started thinking of patching after deployment, you've already neglected the basics.

@gadievron While I agree with everything you said in this thread, I think of "the basics" in a different way: Instead of asking "how feasible is it to do them", I ask "how can I construct my system *so that* it is feasible to do them".

Unpopular Opinion #1: I don’t like The Basics. Not because they don’t matter. They do. I patch, I enforce MFA, I budget for backups and segmentation. But “the basics” have been turned into a cult.

Can someone please explain to me how can YouTube's transcription transcribe me saying "subroutine" as "subruine"? I though, for all AI's faults, it was supposed to always produce a real word (even if not the one I said).