DOS

• Compiling Allegro with Watcom
  Describes how to compile the Allegro library with Watcom or Open Watcom. You can also download my precompiled version.
• Connecting to the Internet through a Windows computer and a PPP connection
  How to connect your DOS computer to the Internet with the help of a Windows computer connected with a serial cable.
• DIRSIZE
  Calculates the size of a directory including all its subdirectories.
• Procedure pointers (callbacks) in QuickBASIC
  An overview of various techniques for calling SUBs in QuickBASIC programs indirectly.
• Using NASM code with QuickBASIC
  A tutorial and collection of techniques for using assembly code in QuickBASIC programs.
• Using Mercurial on DOS
  Notes on how to get Mercurial 3.4.2 running on DOS.