1
Q
What is the role of the accumulator?
A
The special register used as temporary storage by the ALU
2
Q
What is the role of the SR?
A
Used to hold the status of various flags indicating
- a positive/negative result
- carry bit used
- overflow error
- interrupt status
3
Q
What is the role of the PC?
A
Register that holds the address of the next instruction to be fetched
4
Q
What is the role of the MAR?
A
Holds the address of the next instruction to be fetched
5
Q
What is the role of the MBR?
A
Holds the instruction from the MAR and the associated data.
6
Q
What is the role of the CIR?
A
Used to store the instruction that is to be decoded and executed.
Paper 2: A-Level Computer Science
flashcards
Decks in class (40)
# Cards
-
Binary number systems21
-
Number Systems6
-
Sound14
-
Bitmap and vector images19
-
Data Compression11
-
Units of information12
-
Interrupts6
-
Software and Hardware24
-
Instruction set14
-
Programming languages10
-
Translators16
-
Logic Gates10
-
Boolean Algebra Rules21
-
ASCII / UNICODE13
-
Computer Architecture24
-
Encryption12
-
Error Checking12
-
Ethical Questions1
-
External Hardware Devices23
-
Factors that affect processing performance9
-
Fetch Decode Execute3
-
Internal hardware components13
-
Port numbers9
-
Protocols18
-
Registers6
-
Secondary Storage14
-
Big Data10
-
CSMA/CA6
-
Transmission15
-
Topologies14
-
Client-server / Peer-to-peer9
-
structure of the internet13
-
Wifi12
-
The TCP/IP46
-
The Internet18
-
Internet Security21
-
Databases42
-
SQL19
-
The Systematic approach to problem solving10
-
Functional Programming32
