_getkey() + putchar() vs. getchar()

Hello, I've written some code for an educational project which tries to capture input from the user, I've noticed that when using the library function _getkey() alone it turns each typed Enter or...
_getkey() + putchar() vs. getchar()

Hello, I've written some code for an educational project which tries to capture input from the user, I've noticed that when using the library function _getkey() alone it turns each typed Enter or...
Error C231: redefinition (of _getkey)

Hello all, After upgrading from an ancient version of C51 to the latest greatest V8.05A, legacy code does not compile any longer because: Build target 'Target 1' assembling STARTUP.A51... compiling...
Error C231: redefinition (of _getkey)

Hello all, After upgrading from an ancient version of C51 to the latest greatest V8.05A, legacy code does not compile any longer because: Build target 'Target 1' assembling STARTUP.A51... compiling...
Program does not exit from C51STARTUP

I have written some code for a Silabs C8051F330 CPU, compiled it and then obviously some C51STARTUP code is generated that initialize the variables. Using my USB debug adaptor I discover the execution...