$1.(12$ marks$)$ For the program:

$$ Convert the following assembly code into machine code

$$ Identify the $$bugs$$ from the NASM point of view

$$ Identify the design defect $($has no effect on the program operation$)$

$$ Is the memory properly aligned?

ORG $4$B$01$H

NUM$1$ DB $2$

NUM$2$ DW $3$

NUM$3$ DB $4$

ORG $0400$H MOV AH$,$ Num$1$ MOV AL$,$ Num$1$

MOV BX$,[04$B$0$H$]$ AND AX$,$BX

MOV Num$2,$ AX INT $3$

$2.(4$ marks$)$ For question $1,$ determine the program size and cycle count. Do not include INT$3$ as part

of the metrics.

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Assembly

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~

ORG $4$B$01$H

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NUM$1$ DB $2$

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NUM$2$ DW $3$

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NUM$3$ DB $4$

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ORG $0400$H

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MOV AH$,$ NUM$1$

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MOV AL$,$ NUM$1$

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MOV BX$,[04$B$0$H$]$

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AND AX$,$ BX

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MOV NUM$2,$ AX

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INT $3$

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TOTALS

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$3.(6$ marks$)$ Convert the following machine code into assembly code. You can use any address for the

data section.

$04$B$006$

$04$B$100$

$04$B$202$

$04$B$300$

$04$B$402$

$0400$ A$1$

$0401$ B$0$

$040204$

$04038$B

$04041$E

$0405$ B$2$

$040604$

$040703$

$0408$ C$3$

$0409$ A$3$

$040$A B$0$

$040$B $04$

$040$C $22$

$040$D E$0$

$040$E $88$

$040$F $26$

$0410$ B$4$

$041104$

$0412$ CC

$4.(6$ marks$)$ Convert the following C code snippet into assembly language. Assume that the data section begins at $04$C$0$H$.$

uint$8\_$t Num$1=2,$ Num$2=5,$ Num$3$; if$($Num$1>$ Num$2)$ Num$3=$ Num$1+$ Num$2$; else Num$1=$ Num$2-$ Num$1$;

There are many possible solutions.

$5.$ BONUS $(6$ marks$)$ Convert the assembly code in question $4$ into machine code.

$6.$ BONUS $(4$ marks$)$ Determine the program size in question $4,$ as well as the cycle count $($worst$-$case and best$-$case, e$.$g$.$ based on whether the branch is taken or not$).$

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Worst Case

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Best Case

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$7.(4$ marks$)$ There are multiple ways to convert AX $=3+$ DX into assembly. Which of the following is the best solution? $($careful$,$ there are some hidden considerations as well$)$

$8.(3$ marks$)$ What is wrong with the following code $($general point of view for assembly$),$ and how does the second style rectify the problem?