O-LevelComputer ScienceHardware2210/12 · Oct/Nov 2019 · Q24 Marks
The Von Neumann model for a computer system uses several components in the fetch-execute cycle. One component that is used is the Control Unit (CU).
- Identify four other components that are used in the Von Neumann model for a computer system. 1 2 3 4[4]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2019). The mark or mark type is shown in brackets.
- [1] Arithmetic and logic unit (ALU)
- [1] Memory address register (MAR)
- [1] Memory data register (MDR) // Memory buffer register (MBR)
- [1] Accumulator (ACC)
- [1] Immediate Access Store (IAS)
- [1] Main memory // RAM
- [1] Program counter (PC)
- [1] Current instruction register (CIR)
- [1] Address bus
- [1] Data bus
- [1] Control bus
- [1] Input device
- [1] Output device
- [1] Secondary storage device
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