Virtual Study Solutions: Computer Architecture

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<span style="font-size: large;">CS401 - Computer Architecture and Assembly Language Programming Assignment No. 1</span><div>
<span style="font-size: large;"><br /></span><span style="color: red;">Attachment:</span><br />
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<span style="font-size: x-large;">CS401 Assignment  Solution</span></h3>
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<span style="font-family: Trebuchet MS, sans-serif; font-size: x-large;"><span style="line-height: 20.7999992370605px;">CS401 Assignment </span></span><span style="font-family: Trebuchet MS, sans-serif; font-size: x-large; line-height: 20.7999992370605px;">Part 1.</span></div>
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You are required to calculate Physical Addresses for the following two combinations:</div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-size: 12.5pt; line-height: 25px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">1.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-size: 12.5pt; line-height: 25px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">BX+SI+0xFF00</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-size: 12.5pt; line-height: 25px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">2.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-size: 12.5pt; line-height: 25px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">BP+DI+0xA000</span></div>
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<span style="font-family: 'Trebuchet MS', sans-serif; line-height: 20.7999992370605px;"><span style="font-size: large;">Answer</span></span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">      BX+SI+0xFF00</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">First of all wo calculate the Effective Address(EF).</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">In snapshot the value of BX = 0000 and SI = 01A2</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Effective Address =  BX + SI + 0x0FF00</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">EF = 0000 + 01A2 + 0x0FF00</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">EF = 100A2</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Now we compute the Physical Address</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">For BX and SI the default segment is DS</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">In snapshot the value of DS = 0A2E</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = DS * 10H + EF</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = 0A2E*10H + 100A2</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = A2E0 + 100A2</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = 1A382H</span></div>
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<span style="font-family: Trebuchet MS, sans-serif; font-size: x-large;"><span style="line-height: 20.7999992370605px;">CS401 Assignment </span></span><span style="font-family: Trebuchet MS, sans-serif; font-size: x-large; line-height: 20.7999992370605px;">Part 2.</span></div>
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<span style="font-size: 16px; line-height: 24px;">Question 2:</span></div>
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Assume the following Pseudo Code and convert it into proper assembly language instructions that should be assembled and debugged using NASM.</div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">1.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Declare an array named as P_NUM of 5 elements that contains first five prime numbers.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">2.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Set CX to 5 in decimal.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">3.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Move the first element of P_NUM array to the AX.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">4.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Move the fourth element of P_NUM array to the BX.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">5.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Move last element from P_NUM array to the DX.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">6.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Add the values of AX and BX and store the result in AX.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">7.<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman'; font-size: 7pt; font-stretch: normal; line-height: normal; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">     </span></span> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; font-family: 'Times New Roman', serif; font-size: 12pt; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Add the values of new AX and DX and store the result in BX.</span></div>
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<span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; line-height: 20.7999992370605px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;"><b><span style="font-size: x-large;"><br /></span></b></span></div>
Answer</span></b></span><ol style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; line-height: 20.7999992370605px; list-style: none; margin: 5px 0px; outline: 0px; padding: 0px; vertical-align: baseline;">
<li style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; margin: 0px 0px 3px; outline: 0px; padding: 0px; vertical-align: baseline;"><span style="font-family: Trebuchet MS, sans-serif;">BP+DI+0xA000</span></li>
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<span style="font-family: Trebuchet MS, sans-serif;">In snapshot the value of BP = 0000 and DI = 000A</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Now the calculate the Effective Address(EF).</span></div>
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<br /></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Effective Address = BP+DI+0xA000</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">EF = 0000 + 000A + 0x0A000</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">EF = A00A</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Now we compute the Physical Address</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">In snapshot the Default segment of  BP is SS</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">The value of SS is given in snapshot SS = 12A1</span></div>
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<br /></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = SS*10H + EF</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = 12A1*10 + A00A</span></div>
<div align="center" style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border: 0px; line-height: 20.7999992370605px; margin-bottom: 5px; margin-top: 5px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = 12A10 + A00A</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Physical Address = 1CA1A</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;">Answer 2.</span></div>
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<br /></div>
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<span style="font-family: Trebuchet MS, sans-serif;">[org 0x100]</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;"><br />mov cx, 5<br />mov ax, [P_NUM]<br />mov bx, [P_NUM+6]<br />mov dx, [P_NUM+8]</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;"><br />add ax,bx<br />add ax,dx</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;"><br />mov bx, ax</span></div>
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<br /></div>
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<span style="font-family: Trebuchet MS, sans-serif;">mov ax, 0x4c00<br />int 0x21</span></div>
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<span style="font-family: Trebuchet MS, sans-serif;"><br />P_NUM:   dw 2,3,5,7,11</span></div>
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CS401 Assignment No 1 Solution

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