J277 Computer Science paper 1 - Coggle Diagram
J277 Computer Science paper 1
1.1 systems architecture
Holds the memory address of the next instruction to be processed
memory data register
Holds the data or program instructions temporarily when it is fetched from memory or is to sent to main memory
Results from the Arithmetic Logic Unit are temporarily held here before further processing.
Memory address register
Holds the address (the location in memory) of the instruction or data to be fetched or stored
Co-ordinates all the activities that happen inside the CPU.
Arithmetic logic unit
Logical Operations such as AND, OR and NOT
Shift Operations. The bits in a computer word can be shifted left or right by a particular amount
Arithmetic Operations such as addition, subtraction, multiplication and division.
1.2 memory and storage
1.4 systems security
1.5 systems software
1.6 legal ethical and environmental considerations