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Cosmic compiler (4.3.9) _checksum16 or _checksum16x Problem

Question asked by tien.michael on Aug 30, 2013
I use the Cosmic 4.3.9 compiler(32K free) with the built in functions _checksum16() or _checksum16x().  When my program memory cross over the 0x10000, these functions become unreliable.  Before crossing 0x10000, everything is perfect.  Anybody know this problem?

I have to explain why I can exceed 0x10000 since I am using 32K free compiler.  My program memory start from 0xA000(using bootloader at 0x8000) so the whole program still under the size 32K.