4DOS source code licence starts as a simple, all-permissive license,
formulated by Rex Conn:
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated
documentation files (the "Soft-
ware"), to deal in the Software without
restriction, including without
limitation the rights to use, copy, modify,
merge, publish, distribute,
sublicense, and/or sell copies of the
Software, and to permit persons
to whom the Software is furnished to do so.
it then says:
The Software, or any portion of it, may not be compiled for use on
any operating system OTHER than FreeDOS
permission from Rex Conn"
contrary to the above permission "to deal without restriction". When asked
"what about MS-DOS, PC-DOS, DR DOS etcetera?", Rex Conn answered:
I don't have any problems with people using
it on those OS's (although
I'd be surprised if there was a lot of
MS-DOS or PC-DOS action left).
That license was written by the FreeDOS
people – it was probably worded
that way because it's impossible to list
every possible variation of the DOS OS's.
contradictions should be cleared, because they prevent e.g. making 4DOS a
Luchezar Georgiev's patches Luchezar himself says:
I do not claim any "copy right" over my patches or the contents of
this web site – they are placed in "public domain" for maximal benefit
of the DOS community.