I want to make a program for DS5240 target on contiguous mode. 1) What is a diference between 512K and 16M program options? 2) I have old c51 64k mode libraries that I need to use in my program. If I use those without changes I get lots of link errors like: "ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: ?C?CSTOPTR MODULE: ..\..\..\..\bib\HAL.LIB\01.00\bin\HALDBG.LIB (TDESENCRYPT) ADDRESS: 1003D14H" If I change the libs to use contiguous mode then I get a .lib file with only about 20 bytes! How can I use libs in a contiguous mode program? Thanks. Vasco