Illegal Instructions (after Enabling Interrupts)

I changed my project to generated sect30.inc, nc_define.h, ncrt0.a30 - bevor I used the sect30.inc, ncrt0.a30. As I had problem with setting the heap size, stack size I changed.

Now as soon as I enable the interrupts 'asm( "FSET I")' I'll get 'Illegal Instruction' while debbuging with E8.

All settings are the same as befor also the interrupt entries in sect30.inc ... 

Which compiler version do you use? In the latest compilers the interrupt vector table in sect30.inc is disabled with ".if 0". Please have a look at the vector table in E8 to see if the entries make sense.

The question about #pragma interrupt is correct, but the reason is wrong. If you do not have the #pragma interrupt functionname, the compiler will exit the function with RTS (return from subroutine), not with REIT (return from interrupt). But these instructions read different data from stack. So if an interrupt function is exit with RTS the processor does not find the return address and could jump to anywhere in the address range.