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Tutorial 2 KE26604 Computer Architecture & Microprocessors (CAM)

1. For each of the following Logical addresses of 80386 microprocessor, calculate the Physical address of the memory:

i. 1000:1234H ii. 23FB:FAB3H iii. 1234:FFB3H iv. 1000:12FAH v. F000:1245H vi. F300:3467H vii. 10FF: 1144H viii. 3FFF:1234H

2. Briefly, defined the following terms: i. Assembler ii. Assembler Directives iii. Linker

iv. Source code v. Object code vi. Text Editor

3. Describe the structure of an assembly language program and its statement.

4. With the help of an appropriate diagram and example, explain in detailed the following addressing modes of 80386 microprocessor:

i. Register addressing ii. Register Indirect addressing

iii. Base-plus-Index addressing iv. Base Relative plus Index Addressing

5. Briefly, describe the operation of each of the following instructions : a. PUSH AX b. POP AX c. XCHG AX, BX

d. ADD AX, [BX] e. X-OR AX, 0Fh f. BSF AX, [BX + DI]

g. LOADSW h. STOSD i. MOVSB

j. REP MOVSB k. INC CX l. SUB AX, [BX]

m. DEC LIST n. ADC LIST, [BX] o. MUL BX

6. Given that DS = F000H, BX = C300H, DI = 00A3H and LIST = 0100H, determine the physical memory address accessed by each of the following instructions assuming real-mode

operations :

i. MOV AX, LIST[BX + DI] ii. ADD CX, LIST[DI] iii. AND AX, [BX + 100] iv. SUB AX, [BX + DI]

7. A program that perform the following tasks:

Accept a long sentence

Convert it to upper case

Display the result on the screen Design this assembly program using flowchart and pseudocode only.

8. What decimal value is represented by the following 32-bit floating point number given in hexadecimal form?

i. C17B000016 ii. BBC8000116 iii. A17B000016 iii. 89AF00FF16

9. Express the following number as a 32-bit and 64-bit floating point number in hexadecimal form.

i. 36.562510 ii. 65.875610 iii. 198.778510 iv. 1234. 5678910