Is there a open source simple CPU?
Preferably Intel compatible or able to run Linux? Something I can build in my garage or in a simple microprocessor fab.<p>https://github.com/google/skywater-pdk
Have a look at OpenCores.org, or some of the smaller RISC-V cores out there (most of which should be Linux capable).<p>x86 hasn't been "simple" since around the 286 days. IC fabs even less.<p>Plz. define "build in my garage"? Fabricate IC's? Build cpu from heaps of discrete transistors? Implement on programmable logic eg. FPGA?<p>Is "Linux capable" a requirement? Again: kinda conflicts with "simple" - especially considering other things needed to make a working system (screen or serial console, keyboard etc). A small RTOS may be more up your alley.<p>If custom IC: a rough estimate of transistor budget would help. And what peripherals or memory you'd want integrated (if any).