[Scott Baker] is at it again and this time he has built a 4-bit single board computer based on the Intel 4004 microprocessor. In the board design [Scott] covers the CPU (both the Intel 4004 and 4040 ...

8051 8-bit MCU @ 25 to 300 MHz with 8K SRAM The way the Sophgo SG2000 chip works, you can select to use either the 1 GHz RISC-V core or the 1 GHz ARM core, but you cannot use both at the same time.

We have occasionally featured vacuum tube computers here at Hackaday and we’ve brought you many single board computers, but until now it’s probable we haven’t brought you a machine that combined both ...