Z80 and beyond

Loves Z80 and other cool/aesthetic (and more recent) technology. Posts about various interesting and fun "stuff''.

[Z80 and beyond @_rac01]

This always makes me smile.

[aleha_84 @84Aleha]

The cat looks at the rain and sits on the code that draws it all.

[Z80 and beyond @_rac01]

The movie week has not ended yet - even if "In die Sonne schauen" has already been shown. Still - two more beautiful movies. https://t.co/XO73DRgeyZ @MynonaZwo

[Z80 and beyond @_rac01]

Den (langen!!) Film kann man sich ja jetzt schon einmal ansehen. Und dann vielleicht eine(r) derer sein, die sagen "... ja, weisst Du, das habe ich gleich gewusst ..." ;-)
Vielen Dank @FAZ_NET - Also in non-german speaking countries, e.g. 🇵🇱https://t.co/XPFkt2q6sI

[Frankfurter Allgemeine gesamt @FAZ_NET]

Ein Film aus Deutschland darf weiter auf den Oscar hoffen: Das Drama „In die Sonne schauen“ von Mascha Schilinski hat es auf die Shortlist geschafft.
https://t.co/z5fBBmXzy2

[Z80 and beyond @_rac01]

@MynonaZwo Am 28.01.2026 ist es wohl berechtigt zu sagen: "Nichts (von dem viele wüssten) ist ausser Kontrolle geraten."
Es ist schön, von einer Autorin von Zeit zu Zeit durch ihr Buch geführt zu werden. Und ein grosses Privileg!

[Z80 and beyond @_rac01]

@Forstler1 Nennt man die nicht 'Kriegsgewinn(l)er. ;-)

Aber, ja - toll, dass das so ist. Man kann (wenn man richtig Glück hat ...) mit einer @DynamoDresden ("Wir haben einen Traum ...")🖤💛 @DVBAG Strassenbahn direkt bis zu dieser wunderbaren Oper fahren! Danke @Forstler1 für das Photo!

[Z80 and beyond @_rac01]

@MynonaZwo Peter Gabriel - Heroes https://t.co/JOmN3FLurQ

[Z80 and beyond @_rac01]

@Cleofide Sie können nicht in die Zukunft sehen (wirklich nicht, schade!!) - aber Sie können sagen, was an genau diesem Tag vor x-hundert Jahren geschah - und vielleicht gerade deshalb (aus ihrer ganzen Lebenserfahrung), was morgen geschehen wird.

[Z80 and beyond @_rac01]

@Cleofide Wie wäre es, in 2026 statt des (wunderbaren und von mir geschätzten) "an diesem Tag, vor x Jahren" von Zeit zu Zeit mal ein "an diesem Tag und dem !nächsten! Tag -- wird etwas Wunderbares sein" zu posten? Ich sag ja nur. Damit wir mal nicht nur nach hinten sehen.

[Z80 and beyond @_rac01]

@MynonaZwo Jule wäscht sich nie
https://t.co/kUL5RiUnvc

[Z80 and beyond @_rac01]

@MynonaZwo Man kann das Buch so (ein weiteres Mal) lesen - an dem jeweiligen Tag und mit dem durch die Autorin 'markierten' Zitat, auf das man plötzlich besonders achtet.

[Lemma the Optimist @DoctorLemma]

In 1988, during Christmas time, young Icelandic musician Björk appeared on the children’s TV programme Fóstbræður. She sat by a television set, explained how it worked, and dismantled it while describing the internal components.

The segment resurfaced on YouTube in the mid-2010s and became a popular video, loved for its calm, curious tone and wholesome 1980s style.

[Z80 and beyond @_rac01]

The "if this is the future - you better take care" stuff. Thanks for the "food for thought" @LuizaJarovsky !

[Luiza Jarovsky, PhD @LuizaJarovsky]

Scary

[English Reference @RefEnglish]

Ways to say I'M WALKING in English 🚶🏻‍♀️🇬🇧🚶🏻‍♂️

#English #LearnEnglish

[Sophia Proneikos @Pergament_F]

We forget that the simple gesture of putting a book in someone’s hands can change a life. I want to remind you that it can.

[Z80 and beyond @_rac01]

The "QNX, an interesting microkernel and @BlackBerry asset" stuff.

[Understanding Linux: The Kernel Perspective @unix_byte]

QNX Neutrino RTOS is a microkernel real-time operating system in which the kernel itself is deliberately kept extremely small. In QNX, only the most fundamental mechanisms run in kernel mode: scheduling, inter-process communication (IPC), interrupt handling, and basic memory management. All other operating-system functionality, including device drivers, filesystems, networking stacks, and system services, executes in user space as isolated services, communicating with the kernel and with each other via message passing.

The microkernel architecture provides two advantages: extreme fault isolation and high availability. Because drivers and stacks run in protected memory as standard user processes, a software failure in a single component (such as a Wi-Fi driver) cannot "panic" the kernel or crash the entire system. Instead, the failed service can be terminated and restarted dynamically without a reboot. Furthermore, the use of priority-driven preemptive scheduling ensures that high-priority tasks always meet their deadlines, making it a "hard" real-time system suitable for mission-critical environments like automotive safety systems and medical robotics.

QNX has been certified up to ASIL-D (which includes ASIL-B), as an operating system kernel and its core OS services. ASIL (Automotive Safety Integrity Level) is a risk classification system used to define the safety requirements for vehicle components.
- ASIL-B is typically applied to systems where a failure might result in moderate risk or injuries (such as instrument clusters or rear-view cameras).
- ASIL-D represents the highest level of automotive hazard and requires the most stringent safety measures. It is reserved for life-critical systems where a malfunction could lead to fatal accidents, such as electronic braking, steering, or airbag deployment.

Linux cannot do this—its massive code base and monolithic kernel make the formal ASIL-D certification practically infeasible. Recently, Red Hat has achieved ASIL-B certification for a controlled instance of the Linux math library (libm)—a component of glibc, which itself is only one subsystem of the Linux userspace. Achieving an OS-level certification comparable to QNX would require a Linux system to include the kernel, device drivers, firmware, and configurations where each element subject to verification, traceability, impact analysis, and long-term configuration control.

#linux #redhat #qnx

[Uros Popovic @popovicu94]

This thread is part of my ongoing "Linux System Call of the Day" series!

Every day, I break down one of these syscalls, the vital API that lets your userspace programs ask the Linux kernel to perform powerful operations.

Follow along to master the OS from the ground up! 🚀

[Z80 and beyond @_rac01]

Das Wort (na gut, das Lied) zum Dienstag - Keine Zeit mehr (Tribut an Gundermann), Die Randgruppencombo feat. Nora Tschirner
https://t.co/54zmksLNcw

[snoopy and friends @snoopyandfrien6]

MERRY CHRISTMAS 1957

[Z80 and beyond @_rac01]

The "never heard the word "Heisenbug" - but I think I experienced it" stuff. Many thanks @lauriewired - finally also some info on why "printf() debugging" may fool you sometimes.

[LaurieWired @lauriewired]

weirdest part? a std::cout (sorta) fixed it!

Some of you may have already guessed…I was dealing with a Heisenbug.

The very act of observing the behavior hides the issue!

Never forget the stack isn’t “clean”; it’s full of leftover strings / return addresses / pointers.

[Sarah Hodsdon @sarahndipitous]

I forgot to add Mr. McCarthy’s lovelies for the week up top in the nest during Spaces…

They are beautiful. Highly recommend following Cian’s account- he’s a beautiful mind with a poet’s soul 🤟🫂