
DOS support library
   dos.obj ......................... Helper functions for DOS I/O to far and huge memory
   emm.obj ......................... Utility library to make use of the Expanded Memory Manager (usually, EMM386.EXE)
   dosbox.obj ...................... Utility function to detect if we're running in the DOSBox emulator
   biosext.obj ..................... Utility function for real-mode software to use BIOS INT 15H AH=0x87 extended memory copy function
   himemsys.obj .................... Utility library to make use of Extended Memory via HIMEM.SYS
