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In primitive form, the block processing instructions operate on _____ of memory at one
time
1 whole block
2 A single cell
3 A single bit
4 Whole segment
After the execution of STOSWB, the cx will be
1 Decremented by 1
2 Decremented by 2
3 Incremented by 1
4 Incremented by 2
In STOSW instructions when DF is set S1 is
Midterm of cs401 Computer architecture and assemblay language programming
1 Decremented by 1
2 Decremented by 2
3 Incremented by 1
4 Incremented by 2
Which bit of the attribute byte represents the inousity component of foreground color?
1 4 th
2 5 th
3 6 th
4 3 rd
Which of the following flags will be affected by Movsw:
1 DF
Midterm of cs401 Computer architecture and assemblay language programming
2 PF
3 ZF
4 Not effect on flag
Q Write down the working of pop instructions (1)
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Q What does the instruction “mov[es:di],dx” do? 1 mark
Q What is difference between SHR and SAR instructions?
Q Every charcther is displayed on the screen in the form of word. What each byte of this
word represents? 2marks
Q When the instruction”push ax” is excuted in decrement stack how the value of SP will
change? Marks 3
Q Define address bus? 5 marks
Q Explain the working of shift logical left SHL? 5 marks
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