You’d probably get something like [ElectroBoy]’s 8051-based Arduino Uno. The board itself also has some differences from the original Arduino Uno. First of all, it has a USB type-C port ...
The core integrates an 8051 CPU with a serial communication controller, flexible timer/counter, multi-purpose I/O port, interrupt controller, and optionally with a debug unit supporting JTAG and ...
The DT8051 soft core is 100% binary-compatible with the industry standard 8051 8-bit microcontroller ... I/O bit addressable Ports, full duplex UART and interface for external SFR. The DT8051 Core has ...