With this or a PiDP-8, I've idly thought about learning enough to write a "terminal operating system" so one could plug it into a USB port and get a shell to a

With this or a PiDP-8, I've idly thought about learning enough to write a "terminal operating system" so one could plug it into a USB port and get a shell to a Linux or BSD system. That way it could be of actual use to the owner after playing with older operating systems loses its allure.