This code executes the SNC7330 bootrom built-in console standalone and uses UART1 instead of UART0 for I/O.
To build, use the SN_M3B SDK with default startup code to do some basic setup, and use this code for your main program. Add symbol mapping as necessary.
Auto-baud rate is enabled, so connect with any baud rate (115200 by default).
Hit escape at start of line to have the console emit some newlines, and type ?
to see commands. Be careful while working with the console, because it is
capable of erasing flash.