To install the Windows version of the compiler, you will need to download the following file:
Before running the compiler, you will need to run the g77setup.bat file in the c:\g77 folder. This sets up the path and an environment variable necessary for the compiler. This needs to be done each time you open an MSDOS window. To aviod this, you can copy the text from this file and append it to your autoexec.bat file (then reboot).