CS401 Current Paper by Qalb-e-Momin

Current Paper

FINALTERM EXAMINATION

Fall 2022 CS401 - Computer Architecture and Assembly Language programming

Time: 90 min Marks: 60

Q1. (Marks: 01) - Please choose the correct option

1. The thread registration code initializes the PCB and adds it to the linked list so that the __________ will give it a turn. Assembler Scheduler (Page 141) linked Debugger

2. VESA VBE 2.0 is a standard for

High resolution Mode (Page 180) Low resolution Mode Medium resolution Mode Very High Resolution Mode

3. The physical address of IDT (Interrupt Descriptor Table) is stored in _______

GDTR IDTR (Page 182) IVT IDTT

Q4. Which of the following pins of a parallel port connector are grounded?

10-18 18-25 (Page 125) 25-32 32-39

// extra

pin 2 to pin 9: takes data from the processor Pin 10: ACK pin, used by printer pin 18 -25: are ground

5. In 68K processors there is a ........................ program counter (PC) that holds the address of currently executing Instruction. 8bit 16bit 32bit (Page 191) 64bit

Q6. INT 21 service......... is used to read character from standard input with echo. It returns the result in AL Register.

1. 01H
2. 04H
3. 03H
4. 02H

Q7. Motorola 68K processors have....................... 23bit general purpose registers.

1. 4
2. 8
3. 16 (Page 183)
4. 32

Q8. Value of AH in the write Graphics pixel service is

1. 0Ch (Page 144)
2. 0Bh
3. 1Ch
4. 2Ch

// extra yaad krny ky lya….maybe ap ko is ma sy koi puch lain

INT 13 - DISK - RESET DISK SYSTEM

AH = 00h Page # 148(Topic: Storage Access By Using BIOS)

INT 13 - DISK - READ SECTOR(S) INTO MEMORY

AH = 02h

INT 13 - DISK - WRITE DISK SECTOR(S)

AH = 03h

INT 13 - DISK - GET DRIVE PARAMETERS

AH = 08h

INT 13 - INT 13 Extensions - EXTENDED READ

AH = 42h

INT 13 - INT 13 Extensions - EXTENDED WRITE

AH = 43h

INT 21 - READ CHARACTER FROM STANDARD INPUT, WITH ECHO

AH = 01h

INT 21 - WRITE STRING TO STANDARD OUTPUT

AH = 09h

INT 21 - BUFFERED INPUT

AH = 0Ah

INT 10 - VIDEO - WRITE GRAPHICS PIXEL

AH = 0Ch

INT 10 - VIDEO - GET FONT INFORMATION

AH = 1130h

INT 10 - TEXT-MODE CHARGEN

AH = 1110h

INT 10 - VIDEO - SET VIDEO MODE

AH = 00h

---> Some common video modes include 40x25 text mode (mode 0), 80x25 text mode (mode 2), 80x50 text mode (mode 3), and 320x200 graphics mode (mode D).

INT 10 - VIDEO - SET TEXT-MODE CURSOR SHAPE

AH = 01Ah

INT 10 - VIDEO - SET CURSOR POSITION

AH = 02Ah

INT 10 - VIDEO - SCROLL UP WINDOW

(ya bhi aya tha mujhy)

AH = 06Ah

INT 10 - VIDEO - SCROLL DOWN WINDOW

AH = 07Ah

INT 10 - VIDEO - WRITE CHARACTER AND ATTRIBUTE AT CURSOR POSITION

AH = 09Ah

INT 10 - VIDEO - WRITE CHARACTER ONLY AT CURSOR POSITION

AH = 0Ah

INT 10 - VIDEO - WRITE STRING

AH = 13h

Q9. A standard floppy disk has 80 tracks and 18 sectors per track with two heads, one on each side totallying to 2880 sectors or 1440 KB of data. Each sector holds …… bytes of data.

1. 512 (Page 144)
2. 1024
3. 2068
4. 128

Q10. In DOS input buffer format, …….. holds the number of characters actually read on return.

1. first byte
2. second byte
3. third byte
4. forth byte