Works:
    SunOS 5.8 Generic_108528-12 sun4u sparc
    Linux 2.4.20 #1 Fri Jan 17 02:15:24 CET 2003 i686 unknown
    Darwin Kernel Version 6.3 root:xnu/xnu-344.23.obj~4/RELEASE_PPC

Compiles but Problems:
    NetBSD 1.6 NetBSD 1.6 (CUSTOM) #0: Sat Jan 25 11:06:27 CET 2003
    --> curses user input is not non-blocking

