
The cat looks at the rain and sits on the code that draws it all.
Z80 and beyond
2.4K posts

@_rac01
Loves Z80 and other cool/aesthetic (and more recent) technology. Posts about various interesting and fun "stuff''.

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


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. faz.net/aktuell/feuill…




@Schoschana28 De gustibus... Ich finde, wie gesagt, insbesondere den Soundtrack grandios. Da sehe ich gern über einige (wenige) Schwachpunkte hinweg. So ähnlich geht es mir z.B. mit "Schöner Gigolo, armer Gigolo" (mit David Bowie u Marlene Dietrich).




@DerAltePoet "Sorgen wir, daß in paar Jahren Rost an den Raketen frißt / Und daß bald schon jeder Bunker Nistplatz für die Spatzen ist" (Gerhard Schöne).




Scary


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



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.

Profound Words to Sprinkle On Your Christmas Week ✨️ (No need to choose a winner. Take them all. Share them all.)