Hi, on the spec it says that we have to:
"explain how the computer distinguishes between instructions and data"
But I can't really find a clear explanation of this anywhere. Can someone please reply with a simple answer?
Spoiler:Showit appears near the operator/operand stuff ?
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gcse computing theory question (OCR) watch
- Thread Starter
- 02-04-2016 21:39
- 02-04-2016 21:46
There was a question on it on the 2015 exam paper.
Its the general concept of how a CPU can distinguish different sort of data, I believe.
How the "pointer" is able to point at specific label in target memory locations. Generally, PCs starts in 8086 realtime mode with address segment HFFFF offset 0, the start of the BIOS rom which is downloaded into ram.
General questions include: How is a CPU able to distinguish data and instruction:
Mark scheme answer:
Instructions and data are fetched at different pointsof the fetch execute cycle Instructions and data are kept in separate parts ofthe memory (by the operating system)
Or can use pointer to point
Operation is the part of a code which executes target statements.
Operand is the values which will be used in a statement.
1 + 1 = 2
1 = operand
+ = operation