IGNOU BCSL 22 SOLVED ASSIGNMENT

Included:

BCSL 22 2025 2026 - English

Course Code : BCSL-022

Course Title : Assembly Language Programming Lab

Assignment Number : BCA(II)/L-022/Assignment/2025-26

Maximum Marks : 50

Weightage : 25%

Last Dates for Submission: 31st October, 2025 (For July Session)

30th April, 2026 (For January Session)

This assignment has five questions of total of 40 marks, each question carries equal marks. Rest 10 marks are for viva voce. Please go through the guidelines regarding assignments given in the programme guide for the format of presentation.

Q1.Write and run a program using 8086 assembly language that interchanges the values stored in two memory locations. Make suitable assumptions, if any.

Q2.Write and run a program using 8086 assembly language that calculates the sum and difference of two values stored in the memory locations.

Q3.Write and run a program using 8086 assembly language that multiplies the elements of an array of size 4 stored in the memory locations. The result of the multiplication is left in the registers.

Q4.Write and run a program using 8086 assembly language that prints the ASCII character for a 8-bit value stored in BL register.

Q5.Write and run a program using 8086 assembly language that checks if any of the values in an array of size 5 is zero. In case a zero value is found, the index of that array location is moved to DL register, otherwise DL register is cleared.

BCSL 022 (July 2026 - January 2027) - ENGLISH

Course Code : BCSL-022
Course Title : Assembly Language Programming Lab
Assignment Number : BCA(II)/L-022/Assignment/2026-27
Maximum Marks : 50
Weightage : 25%
Last Dates for Submission : 31st October, 2026 (For July 2026 Session)
: 30th April, 2027 (For January 2027 Session)
This assignment has four questions of total of 40 marks, each question carries equal marks.
Rest 10 marks are for viva voce. Please go through the guidelines regarding assignments
given in the programme guide for the format of presentation.
Q1: 
Design a 2-bit synchronous reverse (down) counter using J-K flip-flops. The counter should follow the
sequence 11 → 10 → 01 → 00 → 11 → …. Draw the state transition diagram, prepare the presentstate/next-state table, derive the J and K input equations using Karnaugh maps, and draw the complete
logic circuit.
Q2:
Write and execute an 8086-assembly language program that accepts two ASCII decimal digits (0–9) from
the keyboard using DOS interrupt 21H, converts them into a packed BCD number, and stores the packed
BCD value in a byte memory location. Display the packed BCD value in hexadecimal format. For
example, if the user enters 3 and 5, the stored value should be 35H (00110101) ₂.
Q3:
Write and execute an 8086-assembly language program using a NEAR procedure. The main program
shall initialize a 16-bit integer, pass it to the NEAR procedure using the stack, and call the procedure. The
procedure shall compute the square of the number and return the result in the AX register. Demonstrate
correct stack handling using PUSH, POP, CALL, and RET instructions. Include suitable comments, show
the stack contents during parameter passing, and provide the sample input, output, and register contents
before and after the procedure call.
Q4: 
Write and execute an 8086-assembly language program to determine the length of a string stored in
consecutive memory locations using '$' as the string terminator. Store the final length in CX, and show
the memory layout, important register changes during execution, and the final output.

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