6.1+Exercises

=__Exercises - 6.1__=
 * 1) Explain what the accumulator is and its role in the machine instruction cycle.
 * 2) Explain what the instruction register is and its role in the machine instruction cycle.
 * 3) Explain what the program counter is and its role in the machine instruction cycle.
 * 4) Explain the function of the interrupt register.
 * 5) Describe how buses link the processor, RAM, ROM and cache.