Hallo Sven Did you ever had a look into the Palmtop Application Library (PAL) of Gilles Kohl and friends? They program it actually for the HP LX but do it in plain C and use standard compilers. For task swapping they seem to make use of the carroussel. But maybe it helps to have a closer look there or ask Gilles wether it works for other MS-dos machines. Regards Leo Arendsen