In order to install this GCC package on your MS/DOS machine, copy all these files into your GCC directory (we suggest to use C:\DJGCC - at least we use this directory in the further context) and unpack with pkunzip -d djgcc.zip then set the proper environment variables with setenv If necessary you must change the directory and drive information in setenv.bat - we also suggest to include a 'call setenv' into your autoexec.bat file. When executing SETENV, DOS might report "not enough environment space" or something similar. In this case you must extend the environment by adding or modifying the following line in CONFIG.SYS: SHELL=C:\COMMAND.COM /P /E:nnnn where nnnn is the environment size in bytes (the default is 256 bytes). SETENV uses 123+6xN bytes (N = size of installation directory name; this is 171 bytes for C:\DJGCC). As usual, you must restart DOS before any changes in CONFIG.SYS take effect. To be sure that your installation is ok, enter the gcc directory: cd \djgcc and execute test