ALU संचालन के दौरान मध्यवर्ती मानों (intermediate values) को संग्रहीत करने के लिए मुख्य रूप से किस CPU रजिस्टर का उपयोग किया जाता है?

If signed integers are represented in 2's complement form, what is the range of numbers that can be stored using 8 bits?

Which signal or mechanism is used to interrupt the processor and execute a service routine when an expected response is not received within a set time frame?