Ok, let's clarify what I need to know again, The following fuses: > "and I'm using this code (that does not work)"=20 > __CONFIG( FOSC_INTOSCIO & DEBUG_ON & LVP_OFF & WDTE_OFF & PWRTE_OFF &=20 > BOREN_OFF & CP_OFF & MCLRE_ON ); Are the syntaxes needed when you use Hitech C compiler PRO v9.83 like I do.= =20 These fuses change syntaxes for every different Hitech version numbers (silly but true..) So the original post example that has been tested: > __CONFIG _CONFIG1, > _CCP1_RB0&_LVP_OFF&_MCLR_OFF&_PWRTE_ON&_WDT_OFF&_INTRC_IO=20 > __CONFIG _CONFIG2, _IESO_OFF & _FCMEN_OFF ...is surely from a different version compiler syntax but does the same when compiled.. So what matters here is not a syntax errors issues on compilation but what fuses are needed in the final code (no matter how they are finally written). The best thing would be if someone could show me what settings need to be C coded to blink a led like the earlier example I posted and this done on let's say the Microchip PICDEM 2 PLus board so everybody would know the actual hardware used with=20 no wiring mistakes that could stop the blinking code to be debugged using an internal oscillator at 8mhz.. In the meanwhile I'll try the 16F88 debug working example someone posted earlier. Thanks. =20 =20 -- View this message in context: http://microcontrollers.2385.n7.nabble.com/PI= C16F88-debugging-using-internal-oscillator-issue-tp198964p198983.html Sent from the MicroControllers - PIC mailing list archive at Nabble.com. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .