Q$1.(6$ POINTS$)$ Write some code to COUNT the number of characters in an input line.

Q$2.(10$ POINTS$)$ Write assembly code for each of the following decision structures.

$($A$)$ IF $AL<mn\; id="EditorElement\_3509617">0</mn>$

THEN

Put $FFh$ in $AH$

ELSE

Put $0$ in $AH$

END$\_$IF

longrightarrow

$($B$)$ Suppose DL contains the ASCII code of a character

$($IF DL $"$A$")$ AND $($DL $Z")$

THEN

Display DL

END$\_$IF

Q$3.(9$ POINTS$)$ Write assembly code for each of the following structures:

a$)$ Change the sign bit of $Ax.$

b$)$ Multiply the value of $Bx$ by $7$

c$)$ Assuming AL has a value less than $10,$ convert it to a decimal character.

Q$4.(10$ POINTS$)$ Write a program to read two capital letters, and display them on the next line in alphabetical order.

Q$5.(8$ POINTS$)$ Suppose DH contains $8Ah$ and $CL$ contains $3,CF=1.$ What are the values of $DH,CF,SF,PF,AF,ZF,$ and $OF$ after the instruction.

SHL DH$,$CL ; is executed.

Q$6.(7$ POINTS$)$ Suppose that $Ax=0FFFFh,Bx=0$EEEEh,$Cx=0DDDDh,Dx=0CCCCh$ and $SP=20h.$ Give the contents of AX$,$BX$,$CX$,$DX $,$ and SP after executing the following instructions:

PUSH AX

ADD BX$,1112h$

PUSH BX

POP CX

PUSH CX

POP AX

XCHG AX$,$DX