Hi,
i found that interrupt in pic basic works in small programs but in big programs it doesn't work especially in programs that use alot of if sentences.for example , scanning keyboard with polling method(using if sentences) interrupt doesn't work. i wanted to scan keyboard and when serial data is coming the program goes to taking serial information and then goes back to scanning keyboard but it didn't work.but when i use this interrupt with other programs (in programs that we don't have scanning keyboard) it works. so i want to know that do you agree with me or my idea is wrong?