Recent questions tagged microprocessor

asked Jan 6 by anonymous

Define memory segmentation. How memory segmentation is achieved in 8086? State advantages of memory segmentation.

Last answer: Memory Segmentation: The memory in an 8086 microprocessor is organized as a segmented memory. The physical memory is divided into 4 segments namely, - Data segment, Code Segment, Stack Segment and Extra ... 16 bit size. 6) Programs and data can be stored separately from each other in segmentation.

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asked Jan 6 by anonymous

Enlist the features of 8085 microprocessor.

Last answer: Features of 8085 microprocessor: 1. 16 address line so 216=64 Kbytes of memory can be addressed. 2. Operating clock frequency is 3MHz and minimum clock frequency is 500 KHz. 3. On chip bus ... cycle TTL clock 10. Provide 2 serial I/O lines, so peripheral can be interfaced with 8085 μp

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asked Jan 6 by anonymous

Describe the functions of stack pointer and program counter of 8085.

Last answer: Stack pointer: 1. It is a 16 bit register which is used to store the address of topmost filled memory location of stack memory. 2. SP always points current top of stack. 3. If data is ... of memory and in 8085 the address of memory is 16 bit. Hence program counter is 16 bit register.

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asked Jan 6 by anonymous

Describe re-entrant procedure with the help of schematic diagram.

Last answer: Re-entrant Procedures: A procedure is said to be re-entrant, if it can be interrupted, used and re-entered without losing or writing over anything. To be a re-entrant, Procedure ... program execution flow reenters in the procedure1. These types of procedures are called reentrant procedures.

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asked Jan 6 by anonymous

Explain the following assembler directives. 1) DB 2) DUP 3) EQU 4) ENDs.

Last answer: 1) DB (Define Byte or Data Byte): This is used to define a byte type variable. The range of values : 0 - 255 for unsigned numbers -128 to 127 for signed numbers This can be used ... the end of the segment The directives SEGMENT, ENDS are always enclosed in data, code, stack and extra segments.

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asked Jan 6 by anonymous

Write an algorithm and draw the flowchart to find sum of series of numbers.

Last answer: Algorithim to find sum of series of numbers: 1. Initialize data segment 2. Initialize byte counter and memory pointer to read number from array. 3. Initialize sum variable to 0 4. sum=sum+number from array ... Decrement byte counter 9. If byte counter=0 then step 10 else step 4 10. Stop

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asked Jan 6 by anonymous

Write an algorithm to subtract two 16 bit numbers (With borrow) in 8086 microprocessor.

Last answer: Algorithm for 16 bit numbers subtraction with borrow: 1. Load 0000H into CX register (for borrow) 2. Load the first number into AX(accumulator) 3. Load the second number into BX register 4. Subtract ... . Move data from AX(accumulator) to memory 8. Move data from CX register to memory 9. Stop

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asked Jan 6 by anonymous

Enlist any four addressing modes of 8086 microprocessor.

Last answer: Addressing modes of 8086 : 1. Immediate 2. Direct 3. Register 4. Register indirect 5. Indexed 6. Register relative 7. Based indexed 8. Relative based indexed 9. Implied

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asked Jan 6 by anonymous

State the use of OF and DF flags of 8086 microprocessor.

Last answer: Overflow Flag: This flag is set if an overflow occurs, i.e. if the result of a signed operation is large enough to be accommodated in destination register. Direction Flag: It selects either increment or decrement mode for DI &/or SI register during string instructions.

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asked Jan 6 by anonymous

Define pipelining.

Last answer: Pipelining: Process of fetching the next instruction while the current instruction is executing is called pipelining which will reduce the execution time.

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asked Jan 6 by anonymous

State the functions of following pins of 8085 1) SOD 2) HLDA

Last answer: 1) SOD: Serial Output data SOD pin is used to transmit data serially from accumulator to the external devices connected to the pin. 2) HLDA: Microprocessor generates HLDA signal to acknowledge requesting device after HOLD signal.

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asked Jan 6 by anonymous

State the functions of temporary registers of 8085 microprocessor.

Last answer: Temp Register (8 bits) is also called as operand register as it is used by μp for storing one of the operands during an operation and also for storing the result of any execution temproary.

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asked Jul 31, 2019 by anonymous

Describe the functions of General purpose registers of 8086 microprocessor.

Last answer: (i) General Purpose Registers of 8086 1. AX (Accumulator) - Used to store the result for arithmetic / logical operations All I/O data transfer using IN & OUT instructions use A ... Index - acts as the destination for string movement instructions Used to hold offset address of Extra segment.

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asked Jul 31, 2019 by anonymous

List any four salient features of 8085 microprocessor

Last answer: Features of 8085: 1. 16 address line so 216=64 Kbytes of memory can be addressed. 2. Operating clock frequency is 3MHz and minimum clock frequency is 500 KHz. 3. On chip bus controller ... duty cycle TTL clock 10. Provide 2 serial I/O lines, so peripheral can be interfaced with 8085 μp

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109 views 1 answer