Just documenting on my relay Opensource hardware, based on where I see Centralized Digital ID going. Opensource Motherboard Firmware Coreboot and Libreboot Opensource Hardware and Firmware GPU maker. https://github.com/adam-maj/tiny-gpu TPUs Opensource Hardware/Firmware chips. https://github.com/tiny-tpu-v2/tiny-tpu CPUs Opensource Hardware and Firmware Chips vascofazza/8bit-cpu (74LS-based 8-bit MK1 CPU + bus system) https://github.com/vascofazza/8bit-cpu Full KiCad schematic + PCB (editable .kicad_pcb/.sch) 8-bit https://github.com/fortinsylvain/MyCpu Motherboards/Mainboards (AT/ISA Compatible or Classic Recreations) Opensource Hardware Boards M8SBC-486 (486 Homebrew AT-style Motherboard) https://github.com/maniekx86/M8SBC-486 atx-286at-v1-mainboard (80286 ATX Motherboard) https://github.com/rodneyknaap/atx-286at-v1-mainboard Raemixx500 (Commodore Amiga 500+ Mainboard Remake) https://github.com/SukkoPera/Raemixx500 OpenTendo / OpenTendo-TopLoader (NES Motherboard Recreations) https://github.com/Redherring32/OpenTendo (front-loader) and TopLoader variant. . Modern-ish Open SBC "Motherboards" (Linux-Capable)These are full single-board computers (essentially motherboards with integrated CPU socket/SoC). icepi-sbc (Allwinner H3 Quad-Core ARM Linux SBC with DDR3) GitHub: https://github.com/cheyao/icepi-sbc OLIMEX OLinuXino Series (Industrial ARM Linux SBCs) GitHub: https://github.com/OLIMEX/OLINUXINO (HARDWARE/ subfolders per board, e.g., A20-OLinuXino, A64-OLinuXino, etc.)RAM Opensource Hardware For Retro / 8-bit / Discrete-Logic CPUs (MyCpu, vascofazza/8bit-cpu, RC2014-style):Z80-512K (RCBus/RC2014 compatible) — https://github.com/skiselev/Z80-512K For Retro PC Motherboards (M8SBC-486, atx-286at, etc.):1MB 30-pin SIMM DRAM module — https://github.com/hegars/1M-30pinsimm 72-pin SIMM template — https://github.com/wiretap-retro/72-pin-SIMM-KiCAD-Template For Modern-ish / FPGA / SBC expansions (icepi-sbc, OLinuXino, etc.): Antmicro LPDDR4 Testbed / SO-DIMM style — https://github.com/antmicro/lpddr4-testbed (and DDR5 variant) HyperRAM / PSRAM PMODs (super easy 8–12 pin interface, no complex DDR routing): – https://github.com/mole99/qspi-pmod (QSPI Flash + dual PSRAM) Amiga/Console Raemixx500 or OpenTendo):SukkoPera has open RAM expansions for Amiga 500/600/1200 (search GitHub SukkoPera OpenAmigaRam). Bonus ultra-open options: LiteDRAM (https://github.com/enjoy-digital/litedram) OpenRAM (https://github.com/VLSIDA/OpenRAM)