Structure and Function of the processor 0.0 / 5 ? ComputingFundamentals of computer systemsA2/A-levelOCR Created by: Dandb79Created on: 24-02-17 11:51 What does the PC store? The address of the current insturction 1 of 26 Fill the blank. Fetch-Decode-Execute Blank Cycle 2 of 26 What does the I stand for in CIR? Instruction 3 of 26 Which is used to store the BIOS? ROM 4 of 26 What is the register that performs arithmetic? ALU 5 of 26 What does the Data Bus carry? Data 6 of 26 What does the Address Bus carry? Addresses 7 of 26 What does the Control Bus carry? Control Signals 8 of 26 Where are instructions fetched from? RAM 9 of 26 What does the Accumulator Store? The results of arithmetic 10 of 26 What does the MAR Store? The next piece of data to be read/written or the next instruction to be used 11 of 26 What does the MDR Store? The contents of the address specified in the MAR 12 of 26 What does the CIR Store? The instruction while it is being decoded and executed 13 of 26 What does BRA mean in LMC? Branch Always 14 of 26 What does BRP mean in LMC? Branch if zero or positive 15 of 26 What does STA mean in LMC? Store a variable 16 of 26 What does LDA mean in LMC? Load a variable into ACC 17 of 26 What does ADD mean in LMC? Add two numbers together 18 of 26 What does SUB mean in LMC? Subtract two numbers 19 of 26 What does INP mean in LMC? Input 20 of 26 What does OUT mean in LMC? Output 21 of 26 What does HLT mean in LMC? Exit program 22 of 26 What does DAT mean in LMC? Initialize Data into RAM 23 of 26 What does BIOS stand for? Basic Input/Output System 24 of 26 What is stored in cache? Most common instructions 25 of 26 What is the purpose of a co-processor? A dedicated processor for a specific task 26 of 26
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