FDE Flashcards
1
Q
1
A
Processor gets memory address of current instruction from the PC
2
Q
2
A
Passes address to MAR and send along ADDRESS BUS
3
Q
3
A
Contents PC incremented to point of next instruction being executed
4
Q
4
A
Control unit instructs memory read operation - passes the data back along DATA BUS to MDR
5
Q
5
A
Contents of MDR copied to CIR
6
Q
6
A
Contents of MDR passed to CU which then decodes instruction , then signals to other components instruction to be completed
7
Q
7
A
Instruction executed using ALU or loading / saving data to / from main memory
8
Q
8
A
SR may be updated
9
Q
Interrupt
A
Signal sent to processor that immediately halts other processes until it’s dealt with
