-di 〈 fold〉

This sets the default input folder to 〈 fold〉. This folder is used to find all input paths that do not explicitly specify a folder. For example, if you specify `-di e:\r', then the input path `src\myprog.c' would refer to the file ` e:\r\src\myprog.c', but the name ` d:\yourprog.c' would still refer to drive d. If the ` -di' switch is not given, TOS's ``current working directory" is used instead. This is folder containing the file KEY.TTP unless you are using a shell that lets you set the working directory to something else.