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: ........bibHAL.LIB1.00binHALDBG.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