OCR Computing (Paper 1) Karteikarten am Coding Instructions, erstellt von Megan Aldington am 26/04/2018.
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Erstellt von Megan Aldington
vor etwa 6 Jahre
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Schließen
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Erstellt von Megan Aldington
vor etwa 6 Jahre
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Coding Instructions
The '+' or '-' in an equation is called an (a)_______ and it performs on two (b)_______. In the same way, computers use these in assembly and machine code.
The operator defines what process will be happening:
What are they?
The registers are defined by binary numbers too:
What are they?
But what does each process mean?
Can you give an example?
00001 XXX YYYYYYYY:
ADD value in YYYYYYYY to register XXX
00001 001 00001111, ADD the value 00001111 [15] to register B:
ADD B, 15
00011 XXX:
DECrement [subtract 1 from the] value in register XXX
00011 011, DECrement 1 from register D:
DEC D
000101 XXX YYYYYYYY:
MOVe value in memory address YYYYYYYY into register XXX
00101 000 10000000, MOVe value in memory address 00001000 [8] to register A: MOV A, [8]
