Hello, 1) I am using a Large model for my application. The XRAM area is from 0 to FFFF. Out of this 0-7FFF is used for normal XRAM operations 8000 – F7FF is used Battery backup ram operations for variables initialised with _at_ declarations F800 – FFFF is used for peripheral addressing a) Please let me know how much XRAM should I specify while giving the Target options? b) I want that the startup.a51 file should initialise the XRAM 0-7FFF to 0 and do not change the contents of RAM beyond that. What should be done in the startup.a51 file to accomplish the same. c) Where should I point the XBPSTACK and XBPSTACKTOP. I am using a small reentrant program also in my program. d) Also, is a stack used in the XRAM area if the internal stack is full. Is there any warning message available if the stack is full Regards, Mohit