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The 8085 Microprocessor has five interrupts signals that can be used to interrupt a program execution. They are:
- INTR-Interrupt Request (Input): This is used as a general -purpose interrupt.
- INTA-Interrupt Acknowledge (Output): This is used to acknowledge an interrupt.
- RST 7.5, RST 6.5, RST 5.5-Restart interrupts (Inputs): These are vectored
interrupts that transfer the program controls to specify memory locations. There have higher priorities than the INTR interrupt. Among these three, the priority order is 7.5, 6.5 and 5.5.
- TRAP (Input): This is a non-mask able interrupt and has the highest priority.
In addition to the interrupts, three pins - RESET, HOLD, and READY - accept the externally initiated signals as inputs. The HOLD signal indicates that a peripheral such as a DMA (Direct Memory Access) controller is requesting the use of the address and data buses. The READY signal is used to delay the microprocessor READ or WRITE cycles until a slow-responding peripheral is ready to send or accept data. When this signal goes low, the microprocessor waits for an integral number of clock cycles until it goes high. Lastly, when the RESET IN signal goes low, the program counter is set to zero, the buses are tri-stated, and the MPU is reset and the RESET OUT signal indicates that the MPU is being reset and used to reset other devices.
To respond to the HOLD request, the 8085 Microprocessor has one signal, called HLDA (Hold Acknowledge). It acknowledges the HOLD request.
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Explain how a frequency division multiplexer multiplexes lower-rate signals onto one link?
The signals that go through the montems.
How do you explain a sonic screwdriver?
A device from the Doctor Who franchise that is long, thin, and has the ability to unlock doors, scan computers, detect signals and more.
Explain briefly about LVDT with working and neat diagram?
First off, LVDT stands for linear variable differential transformer. The principle of the LVDT is that the physical energy is converted into electrical signals.
Why FDM is for analog signals and TDM is for digital signals?
FDM stnds for frequency division multiplexing and it is used only in case of analog signals because analog signals are continuous in nature and the signal have frequency. TDM-stands for time division multiplexing and it is used only in case of digital signals because digital signals are discrete in nature and are in the form of 0 and 1s. and are time dependent.
A device that conveys information with analog signals and digital signals is called?
An Electronic Device
HOW IS SOFTWARE INTERRUPT INITIATED?
Interrupt signals initiated by programs are called software interrupts. A software interrupt is also called a trap or anexception. A signal informing a program that an event has occurred. When a program receives an interrupt signal, it takes a specified action (which can be to ignore the signal). Interrupt signals can cause a program to suspend itself temporarily to service the interrupt. Interrupt signals can come from a variety of sources. For example, every keystroke generates an interrupt signal. Interrupts can also be generated by other devices, such as a printer , to indicate that some event has occurred. PCs support 256 types of software interrupts and 15 hardware interrupts. Each type of software interrupt is associated with an interrupt handler -- a routine that takes control when the interrupt occurs. For example, when you press a key on your keyboard, this triggers a specific interrupt handler. The complete list of interrupts and associated interrupt handlers is stored in a table called the interrupt vector table , which resides in the first 1 K of addressable memory.
How the interrupt can be masked or unmasked in 8086?
The 8086 interrupt priorities are concerned ,software interrupt have the highest priority,followed by NMI ,followed by INTR.The lowest priority signals are unmaskable interrupts.
How are multiple interrupts dealt with?
There are 2 approaches to handle this situation,1.Disable interrupts while an interrupt is being processingin this approach, when the processor is being processing an interrupt, the processor ignores any new interrupt signal and these new signals have to wait in a queue and processor will check after the currently processing interrupt is finished.2. Defining priorities for interruptsin this case, each interrupt has a priority value. When the processor is being executing an interrupt, another interrupt can interrupt and gain the processor if the second interrupt has a higher priority than first oneSource- William Stallings, operating systems Sorry, the word you are looking for is not in the Database
How does alcohol interrupt pain signals?
Pain signals are carried to the brain from the spinal cord through nerves. Alcohol slows down the brain and central nervous system, allowing a pain relief.
What is the function of the interrupt vector in computer systems?
The interrupt vector in computer systems is a table of memory addresses that point to specific routines or functions that handle different types of interrupts. When an interrupt occurs, the processor looks up the corresponding memory address in the interrupt vector to determine which routine to execute. This allows the computer to respond to external events or signals in a timely and organized manner.
Does acupuncture work?
It is proposed that acupuncture works because the needles placed in the skin interrupt the nerve signals that transfer pain signals to the brain. Acupuncture can be used for many things including chronic pain and quit smoking plans.
If the ventral roots are destroyed can impulses reach the spinal cord?
In short, Yes.A majority of the "signals" that travel through the ventral roots are motor "signals" going out to the periphery from the spinal cord. As such, the signals have already "reached" the spinal cord from the brain or another region of the spinal cord.Thus, A ventral root lesion will interrupt signals from reaching the periphery.
Explain how a frequency division multiplexer multiplexes lower-rate signals onto one link?
The signals that go through the montems.
How does alcohol interrupt pain?
Pain signals are carried to the brain from the spinal cord through nerves. Alcohol slows down the brain and central nervous system, allowing a pain relief.
Difference between software interrupt and hardware inerrupt?
Hardware Interrupt: Each CPU has External Interrupt lines(about 7). Other external devices line keyboard, Mouse, Other controllers can send signals to CPU asynchronously. Software Interrupt:is an interrupt generated with in a processor by executing an instruction . Software interrupt are often used to implemented system calls because they implemented a subroutine call with a CPU ring level change.
Explain the source of signals detected by the EMG electrodes?
Action potentials along the muscle fibers
What is an interrupt and how are multiple interrupts dealt with?
An Interrupt is a signal that goes into a microprocessor that tells it something has happened that needs attention. There are generally dedicated pins on the microprocessor, often called "Int" (for Interrupt) and "NMI" (for Non-Maskable Interrupt). For a microprocessor, an interrupt signal is like the bell on a telephone is for you; it's a notice that you should stop what you are doing now and deal with this issue that has come up. Exact procedures for dealing with an interrupt vary from one microprocessor to another; generally, the microprocessor puts out a signal that says "Where should I go, then?" and a piece of hardware, the Interrupt Controller, then responds with a signal that tells it which condition has happened. The processor then starts processing the indicated piece of code, and that piece of code handles the condition. The Interrupt Controller often handles setting priority for interrupts, accepting a number of signals (often four), and setting priorities on each. It will trigger another interrupt in the middle of processing one if the new interrupt is a higher priority than the one that is already being processed, or will hold on to the lower priority one until the CPU is finished with a higher-priority one. The CPU can often "disable interrupts" when it is doing something time-critical. At such times, the only interrupt that can occur is the Non-Maskable Interrupt, which is generally reserved for critical error conditions that have to be dealt with immediately no matter what else is going on.
