Intel 8085

Introduced by Intel in 1977, the Intel 8085 is an 8-bit microprocessor that is binary-compatible with Intel 8080. It only requires a +5-volt power supply and has been used as a microcontroller.

3,185 Questions
Algebra
Intel 8085
The Difference Between

Difference between LDA and STA instruction in 8085?

In the 8085, the LDA instruction loads the accumulator from memory, while the STA instruction stores the accumulator to memory. LDA is a read, while STA is a write. LDA is opcode 3AH, while STA is opcode 32H.

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Microprocessors
Intel 8085
Intel 8086 and 8088

What is the size of the instruction queue in 8086?

In 8086 the instruction queue is 6 byte long. This is because even the longest 8086 instruction is 6 byte long. Thus it is possible to prefetch even the longest instruction in the instruction set.

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Microprocessors
Intel 8085

What are the 4 ways to clear the accumulator in 8085 microprocessors?

The four ways to clear the accumulator in the 8085 are...

  • XRA A
  • MVI A,0
  • SUB A
  • LDA {address of a zero}
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Intel 8085
The Difference Between

What is difference between INR and INX instruction?

INR increment the content of register/memory by 1and result is stored in same place.

INX increment the register pair by 1(no flags are affected)

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Intel 8085
Intel 8086 and 8088
The Difference Between

What is the difference between compare and subtract instructions in 8085?

The compare and subtract instructions in the 8085 both subtract one operand from another, and set flags accordingly. The subtract instruction stores the result in the accumulator, while the compare instruction does not - except for the flags, the compare instruction "throws" the result away.

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History
Intel 8085

Why did brecht use direct address?

Brecht wanted to distance the audience from the actors and therefore by coming out of role and directly addressing the audience, the actors did not have to set the scene.

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Intel 8085
Intel 8086 and 8088

Why 8086 microprocessor have two ground pins?

The 8086 has two ground pins in order to maintain the required fanout when pulling low.

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Microprocessors
Intel 8085
Intel 8086 and 8088

What is the function of HOLD pin of 8085 microprocessor?

The HOLD pin on the 8085 is an external request for control of the bus. Upon receipt of HOLD, the 8085 will complete its current cycle and assert HLDA (HOLD Acknowledge), and then it will float the address, data, and control bus one half clock cycle later. The external hardware is then free to use the bus. When it is done, it releases HOLD, the 8085 releases HLDA, and the 8085 takes control of the bus and continues with the next cycle. HOLD is used by external DMA controllers, such as the 8257, to transfer data to and from memory on behalf of high speed peripherals, without requiring 8085 attention to that data transfer.

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Intel 8085

Why the address bus is unidirectional and why the data bus is bi-directional in 8085?

The address bus is unidirectional becos address information is always given by microprocessor to i/o devices. The data bus is bidirectional bcos it takes the data from other devices & also give the data to other i/o devices

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Microprocessors
Intel 8085
Nicknames

What is the nickname for CPU?

g

123
Microprocessors
Intel 8085
Intel 8086 and 8088

Specify the opcode and operand in the instruction MOV HL?

mov H , L mov is opcode H L are operands

345
Intel 8086 and 8088
Intel 8085

Advantages of microprocessor 8086 over 8085?

the advantages of 8086 microprocessor over 8085A microprocessor is that

1)it is a 16 bit microprocessor

2)the disadvantages in 8085A microprocessor like low speed,limited number of registers,low memory addressing capability,less powerful instruction set have been overcome in 8086 registers

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Microprocessors
Computer Science
Intel 8085

What is an 16 bit microprocessor?

A 16-bit microprocessor is a faster type of microprocessor. This type of computer hardware processes digital data up to 16 bits in size at once.

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Intel 8085
Intel Microprocessors

Write program to find the cube of a number using 8085 microprocessor?

4000

lda 50003a,00,504003

mvi b 0206,024005

mov c,a4f4006

mov d,a574007loop2mvi a 003e,004009loop1add d82400a

dcr c0d400b

jnz loop1c2,09,40400e

mov c,a4f400f

dcr b054010

jnz loop2c2,07,404013

mov a,c794014

sta 500532,05,504017

hlt76

enjoy dear friends :) by abin james nellanikattu

789
Intel 8085
Microprocessors
Intel 8086 and 8088

Why AD0-AD7 lines are multiplexed in 8085 microprocessors?

The AD0-AD7 lines in an 8085 are multiplexed to reduce the pin count of the IC. Several added features were added to the 8085 from the 8080 design, and Intel did not want to require a larger package.

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Intel 8085
Intel 8086 and 8088

How many address lines are there in 8086 processor?

20

001
Microprocessors
Intel 8085

What are the interrupts in 89C51?

2external

2 timer

1 serial

1 hard rset

012
Intel 8085

List the sequence of events that occurs when the 8085 MPU reads from memory?

pta nhi hai ?

161718
Computer Science
Intel 8085
Intel 8086 and 8088

What must the address field of an indexed addressing mode instruction be to make it the same as a register indirect mode instruction?

zero

-Aval Preet Singh

345
Intel 8085

C program to convert gray code to binary code?

1001

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Electronics Engineering
Intel 8085

Why 8051 is called 8 bit micro controller?

A: Because it can only control 8 bits of data.

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Intel 8085

Which subcomponent of the CPU takes instructions from memory and decodes and executes the instructions?

My ball sack

001
Computer Memory
Intel 8085
Intel 8086 and 8088

How many address lines will be required to address 8kb of memory in 8085?

4

345
Microprocessors
Intel 8085

What are advantages and disadvantages of 8085 microprocessors?

The advantages of the micro processor is that it small cheap to produce and is able to take over a lot of tasks that were time consuming to people.

advantages of micro processor is that these are general devices which can be programmes to execute a number of tasks.

The disadvantages are that this tends to make some.

the disadvantages are that the can crash and you can lose all your work.

by deva

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Intel 8085

What is meant by multiplexed address data bus?

multiplexed address data bus means that the same bus is used to carry data as well as address. when ALE signal is active this multiplexed bus will contain address and if ALE is not active this bus will contain data.

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