Intro                Explanation of Compiler Directives
 $B.                  I/O Mode Selection                         Default: $B+
 $C.                  Ctrl-C/Ctrl-S Enable                       Default: $C+
 $D.                  Device Checking                            Default: $D+
 $F                   Maximum Number of Open Files               Default: $F16
 $G.                  Input File Buffer                          Default: $G0
 $I.                  I/O Error Handling                         Default: $I+
 $I                   Include File
 $K.                  Stack Checking                             Default: $K+
 $P.                  Output File Buffer                         Default: $P0
 $R.                  Range Checking                             Default: $R-
 $V.                  VAR-Parameter Checking of Strings          Default: $V+
 $U.                  User Interrupt                             Default: $U-