Other contributors have said "How is hardware interrupt started?" is the same question as "How is a hardware interrupt initiated?" If you believe that these are not asking the same thing and should be answered differently, click here
A maskable hardware interrupt is one that can be disabled, or masked, by instructions in the CPU.In the 8085, all interupts except TRAP and (software) RST N can be masked by disabling interrupts, and...
I'm not too sure what exactly you are referring to. But a hardware interrupt is probably an error with something physical for example, a broken harddrive or faulty motherboard. and a software...