HSC Science (Computer Science)
Academic Year: 2016-2017
Date: March 2017
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The flag register of 8085 microprocessor contains_____flags.
(i) 8
(ii) 3
(iii) 7
(iv) 5
Chapter:
ANA, r instruction comes under ____ group
(i) Arithmetic
(ii) Logical
(iii) Branch
(iv) Data Transfer
Chapter:
The maximum physical memory can be addressed by 80286 microprocessor Is _____
(i) 640 KB
(ii) 1 MB
(iii)16 MB
(iv)4 KB
Chapter:
______cable uses light signals to transmit data.
(i) Fiber Optic
(ii) Coaxial
(iii) UTP
(iv) STP
Chapter:
Explain Multiplexed Address and Data Bus of 8085 MPU.
Chapter:
Explain functions of the following pins of 8085 Microprocessor : RST 6.5
Chapter:
Explain functions of the following pins of 8085 Microprocessor: CLK (OUT)
Chapter:
Write the addressing mode and length in bytes of the following instructions :
(i) CPI 10 H
(ii) MOV M, B
(iii) SHLD C009 H
Chapter:
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The accumulator in 8085 microprocessor contains data 71H and register E contains data 39H. What will be the contents of an accumulator in Hexadecimal after execution of the following instructions independently ?
(i) ADD E
(ii) ORA E
(iii) RRC
Chapter:
State any three advanced features of 8052 microcontroller over 8051 microcontroller.
Chapter:
State the different hardware interrupts with their priorities and branching addresses.
Chapter:
Write any three difference points between Memory Mapped I/0 and
I/O Mapped I/0 Addressing Scheme.
Chapter:
Explain the following instructions of 8085 Microprocessor with one
example of each : PUSH PSW
Chapter:
Explain the following instructions of 8085 Microprocessor with one
example of each : INX rp
Chapter:
Explain the following instructions of 8085 Microprocessor with one
example of each : DAD rp
Chapter:
Write any two features of following Microcontrollers : 8048
Chapter:
Write any two features of following Microcontrollers : 8052
Chapter:
Write any two features of following Microcontrollers : 8031
Chapter:
Write any two features of following Microcontrollers: 8050
Chapter:
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Compare any three attributes of 80386 and 80486 Microprocessor
Chapter:
Write any three instructions to make Accumulator Zero
Chapter:
Write a function of following functional units of 8085 Microprocessor : Instruction Decoder
Chapter:
Write a function of following functional units of 8085 Microprocessor : General Purpose Register
Chapter:
Write a function of following functional units of 8085 Microprocessor : Data/Address Buffer
Chapter:
Write a function of following functional units of 8085 Microprocessor : Status -Register
Chapter:
Explain in short six characteritics of Transmission Media.
Chapter:
Write a Assembly Language Program to copy a block of data having starting address 4500 H to new location starting from 4600 H. The length of block is stored at memory location 44FF H.
Chapter:
Write an Assembly Language Program to add two 8-bits BCD numbers stored at memory location 4500 Hand 4501 H. Store the two byte BCD result from memory location· 4502 H onwards.
Chapter:
Write an Assembly Language Program to fill the memory locations 4500H to 4504 with the Hexadecimal numbers 09 H to ODH respectively.
Chapter:
Write an Assembly Language Program to exchange the nibbles of 8-bit number stored in memory location 4500H. Store the result at memory location 4501H.
Chapter:
A block of data is stored in memory location 4500 H. The length of block is stored in memory location 44FFH. Write Assembly Language Program that searches for the first occurrence of data D9H in given block. Store the address of this occurrence in H.L. pair. If the number is not found then HL. pair should contain 5000 H.
Chapter:
A block of data is stored from memory location 4501H and onwards. The length of the block is stored at memory location 4500H. Write an Assembly Language Program to fmd the sum of block of data. Store the two byte result from memory location 4600 H.
Chapter:
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