It looks like the FPGA that monitors/controls the redundant/lockstep CPUs might be radiation tolerant. From [0]:
"..the critical FPGA which is always on for the duration of the mission, the radiation tolerant ProASIC3 is chosen with the military temperature grade (-55 C to 125 C) and -1 speed grade to mitigate the degradation in the propagation delay caused by the total dose radiation. The single-event upset (SEU) is mitigated with triple module redundancy (TMR) in the FPGA design.
...
The FPGA device is a military-grade version of MicroSemi’s ProASIC3L, which uses the same silicon as the radiation-tolerant device from the same family."[0]
The specs from [1] say there is also a specific radiation-tolerant variant.
So it looks like the CPUs themselves have dual lock-stepped cores, and the CPU checks for errors each cycle. If there's an error it flags the FPGA, which switches to the other CPU.
Only the microcontrollers are automotive redundant CPUs from Texas Instruments.
The high-level control and data processing is done by a now very old smartphone Snapdragon 801 CPU, which has no redundancy and it runs Linux. That CPU uses 4 custom 32-bit Qualcomm Krait cores, which were extremely fast in comparison with the radiation-hardened CPUs available at that time, but which are very slow in comparison with the current automotive CPUs or smartphone CPUs.
Nowadays there are automotive redundant CPUs, using high-performance automotive-enhanced ARM cores like Cortex-A78AE or Neoverse V3AE, which are far more suitable for a space mission than a smartphone CPU.
Because Snapdragon does not have the right hardware, approximate redundancy is achieved by software, i.e. by running multiple times each algorithm and comparing the results, and also by periodic self tests.
This is better than nothing, but a hardware-redundant CPU would have provided much better performance.
See also perhaps Jesus and John Wayne: How White Evangelicals Corrupted a Faith and Fractured a Nation by Kristin Kobes Du Mez:
> The book examines white evangelical affinity for Donald Trump. Du Mez explains that white evangelical support for Donald Trump during the 2016 United States presidential election was a continuing trend rather than an exception. The book focuses on the militant masculinity that white evangelicals idealize and how it has manifested in a pattern of abuse among evangelical leaders. Du Mez criticizes mainstream evangelicals such as John Eldredge, John Piper, and James Dobson for advancing the evangelical ideal of militant masculinity.[4]
Finder has always been pretty garbage. Which view will the finder show this folder in? I never know, because it's always inconsistent.
Another bug, I'd been running the beta macos Sequoia 15.7.4, and if I'd search for all the e.g. PDFs in my ~/Downloads, then move them to the trash, they'd still show up in the search, but if you clicked on them, the filepath would show trash.
I doubt they will, but I hope they keep updating sequoia with security fixes for a while longer.
I just had to add more, because I remember they used DEC Alpha systems at some point.
" Alphas for design stations serving 5 animators and one animation assistant (housekeeping and slate specialist). Most of these stations run Lightwave and a couple add Softimage. VERY plug-in hungry. PVR's on every station, with calibrated component NTSC (darn it, I hates ntsc) right beside.
P6's in quad enclosures for part of the renderstack, and Alphas for the rest, backed up 2x per day to an optical jukebox.
Completed shots output to a DDR post rendering and get integrated into the show.
Shots to composite go to the Macs running After Effects, or the SGI running Flint, depending on the type of comp being done, and then to the DDR (8 minutes capacity on the SGI)."[0]
This has been policy for years. I just can't make myself upgrade to Tahoe.
From [0]:
"Because of dependency on architecture and system changes to any current version of Apple operating systems (for example, macOS 26, iOS 26, and so on), not all known security issues are addressed in previous versions (for example, macOS 15, iOS 18, and so on)."
The explanation doesn't make much sense here, as the patches exist, they are simply being made available only for the subset of devices. Some of the listed vulnerabilities aren't even in the OS itself, but in the apps like Books, Mail and Messages.
What were the MS-DOS programs that Windows used the progman.exe stock icons for?
https://devblogs.microsoft.com/oldnewthing/20250506-00/?p=11...
What were the intended uses of those icons in moricons.dll?
https://devblogs.microsoft.com/oldnewthing/20250505-00/?p=11...
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