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Interplanetary Habitable Zone: Calculations for the Solar System

https://sudonull.com/interplanetary-habitable-zone-calculations-for-the-solar-system

Learn how to calculate the interplanetary habitable zone (IHZ) for space colonization. Comparison of the Solar System and TRAPPIST-1, Δv factors, radiation, resources. Models for developers.

SD card as ROM for RISC-V YRV FPGA

https://sudonull.com/sd-card-as-rom-for-risc-v-yrv-fpga

Implementation of SD card as program memory for YRV on Tang Nano 9K: FSM, SPI, tests with HELO. Instructions for FPGA developers. Study the code and optimizations.

RISC-V RVA23 in Linux 7.0: SpacemiT K3 support

https://sudonull.com/risc-v-rva23-in-linux-7-0-spacemit-k3-support

First RVA23 SoC SpacemiT K3 enters mainline Linux 7.0. ISA standardization eliminates fragmentation for embedded. Ubuntu 26.04 LTS with support. Breakdown for developers: trade-offs, benchmarks, toolchain.

Launching RISC-V K1921VG015: toolchain and OpenOCD

https://sudonull.com/launching-risc-v-k1921vg015-toolchain-and-openocd

Setting up riscv-gnu-toolchain, OpenOCD with DirtyJTAG for K1921VG015. Step-by-step build, GCC14 patches, flashing in WSL. Instructions for middle/senior dev.

Multithreaded RISC-V soft-processor for FPGA

https://sudonull.com/multithreaded-risc-v-soft-processor-for-fpga

Implementation of hardware multithreading in RISC-V soft-core: shadow registers, hart_table, CSR. Simplification of IRQ and context switching. Verilog sources for FPGA.

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