Name:

Date: $27$ April $2009$

Number:

EENG$410/$INFE$410-$ MICROPROCESSORS I Midterm Exam

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Instructor: Dr$.$ Hasan Demirel

Read the Following Instructions Carefully:

The duration of the exam is strictly $100$ minutes. No extra time will be given.

Answer each question to a separate sheet on your answers booklet.

Return the question sheet along with your answers booklet.

QUESTIONS

$(\%18)$ What will be the values of the specified registers and flags after the execution of the following instructions?b$)$ MOV AX$,29$FEHMOV CX$,8$C$03$HSHL AH$,$ CLSBB AX$,$ CXAX$=?,$ CX$=?,$CF$=?,$ PF$=?,$ AF$=?,$ SF$=?,$ ZF$=?$c$)(\%7)$ Write a sequence of instructions that counts number of $1$s in registers AX and BX$.$ Then, the content of the register with the higher number of $1$s is copied into register DX$\mathrm{.}2.(\%25)$ Write the definition of a subroutine which would Capitalize Each Word in a given sentence in the following data segment. Note that, in a capitalized word, only the first letter is uppercase and rest of the letters is lowercase.Hint: Lowercase characters are ordered between $\text{'}$ a $\text{'}(61$H$)$ and $\text{'}$ z $\text{'}(7$AH$)$ in the in the ASCII Code table. For lowercase letters, bit $5($d$5)$ of the ASCII code is $1$ where for uppercase letters it is $0.$ For example,

$\backslash$table$[[$Letter$,$Binary,ASCII$],[h\text{'},01101000,68H$