For reference, that means the 486 has maybe as many transistors as the board that runs my 11-year-old 3D printer firmware, and that was considered something between the “absolute bare minimum” and “honestly kinda underpowered” at the time I bought it. The only thing that board does is run some loops that send basic signals to some stepper motor drivers, and some basic-ass “bang-bang” style heat control. The actual heavy lifting of organizing and sending the position controls line by line is done by a Raspberry Pi.