1. A signed integer variable has a range of -2 to the power of 15 to +(2 to the power of 15)-1...
In this range the number of binary digit combinations would be 2 to the power of 16.. no doubt!
But a number combination of a binary 1 at the MSB is possible but what value does it have? What is the significance of that number? The value in the case of unsigned int would be (2 to the power of 15) what will be the value when it is signed. i.e. (1000000000000000)base2.
2. Can we hook the NMI interrupt and write our own routine in its interrupt vector?
3. Can we use software interrupts to generate NMI?
Hope u will solve my silly questions. Thanks in advance.