@landley @dalias @stman that makes sense...
#SPARCv9 / #sparc64 - like #Power9(+) / #ppc64 - aren't per-se bad and a lot of it is used in #CriticalInfrastructure systems like the BAE #Rad750 & #esa #LEON...
Not to mention the fact that they - alongside #RISCv - are the only fully opensourced #ISAs with sufficient powerful designes fit for use cases beyond #IoT-Sensors and other "edge (embedded) computing" applications...
I've not gotten myself over to subscribing the #LKML since the amount of traffic there is just extreme...
But I'd love to see more supported architectures I can port @OS1337 to, and I'd ideally prioritize those long-term that have solid toolchain / compiler / userland support as I don't want to change any upstream code if possible and stick with fixed releases so that even decades later someone can rebuild such a system from scratch if need be...
https://github.com/OS-1337/OS1337/blob/main/docu/ideas/architectures.tsv
As goes radation-hardened SoCs, so goes a segment the #embedded computer industry. I worked on the #VxWorks #RTOS port for PPC750+7400, the basis of #RAD750, and that was a major performance bump. The #SiFive X280 should enable a huge bump in smart on board processing for spacecraft. #riscv #powerpc
SiFive RISC-V cores and Microchip processors will power NASA's future space missions | TechSpot
https://www.techspot.com/news/95911-sifive-risc-v-cores-microchip-processors-power-nasa.html
Radiation hardened Power PC (#RAD750) used on #Opportunity rover.
200K for each board, twins and they run identical VxWorks real-time operating systems.
On land in 06/08/2012 it used the “Side-A” computer, after ~ a year (200 Sol of 669 Sol planned) #NASA swap to side-B for memory corruption on side-A (256 MB of DRAM on each board)
Actually the #rover is at 2320 martian sols (or 2383 earth days, 1696 days longer than expected)
(Each boardr also has 256 kB of EEPROM and 2GB of flash memory)
Kevin Karhan 
James Trickle uP
Hank G
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