BasiEgaXorz is an old Win32 program that allows you to write BASIC programs and compile them to Sega Genesis cartridge or Sega CD ROMs.
I get this screen:
But where is my ROM?
In the installed version on Windows 10,
basic.bin is written to
C:\Users\%USERNAME%\AppData\Local\VirtualStore\Program Files (x86)\basiegaxorz\basic.bin.
basic.bin can be used with any Genesis emulator, and used on a real Genesis.
For some reason, this path cannot be changed in the Options, and is not listed anywhere in the documentation.