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
Microprocessors
Intel 8085

Multiple choice questions with answers for microprocessor?

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Intel 8085

What is meant by low order and high order address bus?

Low order means the low end, and high order means the high end. Think of a decimal constant - lets pick 1234 - 12 would be considered the high order and 34 would be considered the low order.

In the 8085, the address bus is A15 (high order bit) to A0 (low order bit). Since the processor is byte organized, you can say this as A15-A8 is the high order byte and A7-A0 is the low order byte.

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Microprocessors
Intel 8085

How is the parity flag set in the 8085 microprocessor?

If the answer (stored in accumulator) has an even no. of 1s, the parity flag is set or vice versa.... This flag may be modified after an arithmetic or logic operation......

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Microprocessors
Intel 8085
Intel 8086 and 8088

What is a microprocessor?

MicroprocessorA microprocessor is a computer processor on a microchip. It contains all the essential components and need RAM memory only. Some Microprocessors also hold their own RAM ("Random Access Memory"). A microprocessor is designed to perform arithmetic and logic operations that make use of data on the chip and data in RAM. Typical microprocessor operations include adding, subtracting, comparing two numbers, and jumping in the instruction set. These operations are the result of the code produced. When the computer is turned on, the microprocessor is designed to get the first instruction from the Basic Input/Output System (BIOS) that comes with the computer. After that, either the BIOS, or the operating system that BIOS loads into computer memory, or an application program is "driving" the microprocessor, giving it instructions to perform.

A microprocessor computes instructions depending on how fast the processor is designed and if the processor's clock crystal (think of the clock crystal as a metronome). The faster (in mHz or gHz) the processor and its clock crystal are, the better.

Processors currently come in 8, 16, 32 and 64 bit versions. AMD, Intel and VIA are the three leading processor manufacturers. On e.g. washing machines, you can make all the logic needed with a simple 8 bit system that holds all operating system and programs on the chip. More sophisticated may need 16 bit. There is one down-side to using many bits for data, and that is that the more you have to load into the microprocessor, the longer time will it take, and the slower will you perceive that the device is - unless someone is cheating and does things for more than one at a time.

You have the option of buying a traditional single-core processor, or the newer technology: dual/duo or quad core processors. These technologies essentially contain two or four or more CPU that share the same cache, which enable more instructions to be executed. The faster the clock cycle is, the more heat will the microprocessor require. The alternative is to change technology - chemistry and use denser circuits. CMOS operate at 1.6V and require very little to blow the device to kingdom come. But this is the dominant technology. Faster switching may be achieved by e.g. SOS, advance nMOS but will require more power.

The speed of the light limits the clock frequency that is used. So 2GHz makes the distance the electricity travels between during each cycle around 17cm or 7". Placing more on the actual microprocessor, and reduce the number of bits and thus the complexity, is a simple way to make devices run faster and more reliable.
A microprocessor is an integral circuit that acts as the main processing unit of a computer. Known as the "brain" of the computer it carries out instructions, performs calculations and interacts with the components which operate the machine.
What is the use of queue in Momory

929394
Kia
Timing Belts and Chains
Intel 8085
Intel 8086 and 8088

Where can you get the timing diagram for '98 Kia?

Go to kiatechinfo.com register as owner, select year and model, click service manual, click engine, click engine mechanical system, cilck timing system, click timing belt, click repair installation/removal, click installation,done!

107108109
Electronics Engineering
Radio
Intel 8085

Why clock frequency of 6.14 mhz is used in 8085 microprocessor?

To ease serial Baud Rate generation.

818283
Entertainment & Arts
Microsoft Xbox
Intel 8085
For the Love of Ray J

The location andor address of the house used on Flavor of Love?

2 E. 20 St
Kansas City, MO 64108

101102103
Computer Hardware
Microprocessors
Intel 8085

In a processor these are 120 instructions Bits needed to implement this instructions?

It takes 7 bits to implement the opcode space of 120 instructions.

27 = 128

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Intel 8085
Intel 8086 and 8088

Can you please explain me about instruction register?

Instruction register:-

it hold's the instruction decoded bu control unit..

if you know that bus is the communication Chanel of computer system,

whenever we enter some instruction it's going to pass by bus. but we send instruction in human understandable form so all data should be convert in bus understandable form. now all data convert in bus understandable form but here is the problem that what C.P.U. not able to understand that , so control unit convert all instruction in c.p.u. understandable form now all data converted in c.p.u. understandable form but still there in c.p.u. going some process so it can accept that thing right now ..so it can store in some where in c.p.u. that called instruction register..

I.R is the one type of register.it can hold very small amount of data.

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Intel 8085
Intel 8086 and 8088

Why 8086 is an 16 bit microprocessor?

The 8086 is a 16 bit microprocessor because Intel designed it that way. It was considered to be the next logical evolution of the 8085, which is an 8 bit processor.

The number of bits that a processor is called is generally the fundamental accumulator size. In the 8086, AX is 16 bits in size, while in the 8085 A is 8 bits in size.

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Intel 8085

Why the program counter is 16 bit in 8085?

The program counter is 16 bits in size on the 8085 because that is how Intel designed it. The address bus is also 16 bits, so it made sense for the program and stack to be located anywhere in that address space.

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Intel 8085

What is the use of command MOV A A in 8085 microprocessor?

The MOV A,A instruction in the 8085 does nothing, not even change flags. It only consumes time, specifically four clock cycles plus applicable wait states.

858687
Science
Meteorology and Weather
Intel 8085
Intel 8086 and 8088

Instructions for Envirastation dws-200?

http://www.homedics.com/prod/detail.aspx?ID=190#

858687
Intel 8085
Intel 8086 and 8088

Where is the location for address memory map in the Z80 simulator?

It depends on the particular simulator. You need to be more specific in your question.

838485
Computer Science
Intel 8085

What is the block diagram of microprocessor?

Block diagram

Working:

· CPU consists of three basic units: control unit, Arithmetic Logical Unit (ALU) and memory unit.

· Input is given through the input devices to CPU.

· Control unit controls communication within ALU and memory unit.

· Decides which circuit is to be activated.

· For reading instruction it uses Fetch-execute mechanism.

· Control unit gets instruction from memory.

· Control unit decides what to do of that instruction and transfers it to the ALU.

· ALU performs various arithmetic operations like addition, subtraction, multiplication, division and logical operations like AND, OR, NOT, NAND etc. on that instruction.

· Results of ALU are stored in the memory or resistor for its further operations.

· After completing the instruction, stored results are passed to the output devices.

· To synchronize all these operations CPU uses its own system clock.

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Intel 8085

Possibe way of implementing ret instruction in 8085 if ret insruction was not present?

You would have to pop the stack into two dedicated memory locations in RAM, saving and restoring the register(s) used to do that, prefix those two locations with a JMP opcode, and JMP to the JMP.

838485
Computer Science
Intel 8085

Why you use the wait state in 8085 microprocessor?

The wait state, TWait, is a extra clock cycle added to the machine cycle to allow time for external hardware to respond. During this extra cycle, none of the address, data, or control pins change state. Wait state is entered if READY is false (LOW) on the rising edge of clock following ALE. READY is sampled each rising edge of clock thereafter and wait state will not be exited until READY is true (HIGH).

757677
Computer Monitors
Intel 8085
How To

How to find the hex code for instruction in 8085?

There are many instructions in the 8085. To find the hex code for a particular instruction, you need to look at the data sheet. For more information, please see the Related Link below.

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Intel 8085
Intel 8086 and 8088

Instruction set of 8086 and 8088 microprocessor?

http://en.wikipedia.org/wiki/X86_instruction_listings

http://www.chiplist.com/ISA/8086/

717273
Intel 8085
Keyboarding

Specify four control signals used by 8085?

MERD-Memory read MEWR- Memory write IORD-input output read IOWR-Input output write

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Idioms, Cliches, and Slang
Definitions
Spanish to English
Intel 8085

What is the meaning of here you are?

When you hand something to a person, you might say "here you are," meaning "here is the item you need or want."

If you say "here you are" when you see a person, you mean "Aha, I wondered where you are and now I see that you are here."

313233
Computer Programming
Remote Control Devices
Intel 8085
The Difference Between

How do you program a rcr3273 remote?

Make sure the device is on. Hold down the tv (or whichever device you're trying to program) button and the power button simultaneously until the red light stays on solid. Then press the power button, it will flash one time, and keep pressing slowly, letting it flash until the device turns off. Then press the stop button...and it is programmed. Yay, - Rony

798081
Microprocessors
Intel 8085
Intel 8086 and 8088

Why instruction queue of 8086 microprocessor is 6 byte?

Because that's how Intel designed it. The size of the instruction prefetch queue is a design tradeoff between complexity and performance, given a certain target instruction mix and desired queue hit/miss ratio.

757677
Electronics Engineering
Intel 8085
Very Large Scale Integration (VLSI)

What is VHDL?

VHDL is the VHSIC Hardware Description Language. VHSIC is an abbreviation for Very High Speed Integrated Circuit.

It can describe the behaviour and structure of electronic systems, but is particularly suited as a language to describe the structure and behaviour of digital electronic hardware designs, such as ASICs and FPGAs as well as conventional digital circuits. VHDL is an international standard, regulated by the IEEE. Simulation and synthesis are the two main kinds of tools which operate on the VHDL language.

VHDL allows designs to be described using any methodology - top down, bottom up or middle out! VHDL can be used to describe hardware at the gate level or in a more abstract way.

474849
Tablets and Handheld Computers
Computer Memory
Intel 8085
Intel 8086 and 8088

Why 8086 requires address bus of 20 bits while using 16 bit address for segement register?

This is due to the fact that 16bits would only address 64KB of memory, which even then was very little.

The answer for this was to come up with an extra 4 bits to address the total 1MB, this is done trough segmentation of the memory. Google it.

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