Tom is absolutely correct. You are trying to change the attributes of Device 0 (STDIN) to 0 (so that is it is not really even a device any more). After that, for all practical purposes, you have disabled the computer.
Apparently, FreeDOS doesn't see this as a problem (it assumes you know what you are doing) but other DOS versions know this will cause problems and automatically reject your request. I personally can't think of a good reason to ever want to change a devices attributes, but there may be some special case I can't see right now. But I can see no reason to ever change the attributes of any standard device (STDIN, STDOUT, STDERR, etc.). _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
