May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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19-18
THE
x86 MICROPROCESSORS
iii) The requirement is to copy the contents (through the stack) of R5 to A and R6 to B.
Since the stack top contains the content of R6, the first POP operation is to pop to B.
iv) Keep in mind that for a stack, what is pushed in last is what can be popped out first.
v) The second pop operation copies the stack top contents to A.
Note There is no need to use the stack to copy the contents of one register to another.
The program here uses this method only to illustrate the working of a stack.
19.6 | Processor Status Word (PSW)
This is a register with address D0H, which has the conditional flags and also contains ...
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