1
Q
What is the first step in ‘fetch’
A
contents of PC are copied into MAR
2
Q
what is the second step in ‘fetch’
A
instruction held at that address in main memory goes in MBR
3
Q
what is the third step in ‘fetch’
A
PC is incremented to hold the address of the next instruction to be executed
4
Q
what is the fourth step in ‘fetch’
A
contents of MBR are copied into the CIR
5
Q
what is the first step in ‘decode’
A
The instruction held in the CIR is decoded by the control unit
6
Q
what is the second step in ‘decode’
A
the opcode identifies what type of instruction it is
7
Q
what is the first step in ‘execute’
A
for LOAD and STORE instructions, the MAR and MBR are used to access data from main memory
8
Q
what is the second step in ‘execute’
A
the GPR and SR are updated
9
Q
A
comp sci
flashcards
Decks in class (16)
# Cards
-
fetch, decode, execute9
-
structure of the processor38
-
infix and postfix19
-
computer architecture57
-
types of numbers32
-
factors affecting processor performance37
-
boolean laws and algebra identities20
-
processor interrupts14
-
subroutines, structures and built-in functions18
-
logic gates25
-
storing objects, stack and heap27
-
memory allocation19
-
network protocols58
-
function stubs and passing parameters6
-
computer networks31
-
packet switching18
