Implement a $6502$ assembly function strncpy that copies a null$-$terminated string

MESSAGE into the preallocated buffer COPY. If the source string is longer than the buffer, the

function must copy as much of the string as possible. The terminating null must be copied, too.

Thoroughly test the function with different types of source strings $($empty; short; barely fitting;

not fitting$).$

Use the JSR instruction to test the function. Ensure the function returns control to the caller

using the RTS instruction: