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Hi!, I am using g++ 2.7.2.3 for the Hitachi SH1 processor. ( sh-hms target ). The compiler works fine, but I am trying to do a interrupt service routine in C++. If I implement the ISR as a C++ function then it just crashes. If I put the ISR in a .c file and then call a C++ function from it then it works. More or less the code looks like this: file1.c: #pragma interrupt void isr(void) { isrCPP__Fv(); } file2.c: void isrCPP() { // real interrupt service routine } BTW, Do you know why I must add a __Fv to the C++ function name? But I believe there must be a better solution. Any hint? Thanks in advance, Ivan -- Ivan Porres Paltor Turku Centre for Computer Science Åbo Akademi, Department of Computer Science Phone: +358-2-2154033 Lemminkäinengatan 14A FIN-20520 Turku - Finland http://www.abo.fi/~iporres