What is an interrupt in microprocessor?
Interrupt is the method of creating a temporary halt during program execution and allows peripheral devices to access the microprocessor. The microprocessor responds to that interrupt with an ISR (Interrupt Service Routine), which is a short program to instruct the microprocessor on how to handle the interrupt.
When the microprocessor 8085 is executing and it is interrupted it?
When the instruction is executed, the processor executes an interrupt service routine stored in the vector address of the software interrupt instruction. The software interrupts of 8085 are RST O, RST 1, RST 2, RST 3, RST 4, RST 5, RST 6 and RST 7.
What do you mean by 8085?
The Intel 8085 (“eighty-eighty-five”) is an 8-bit microprocessor produced by Intel and introduced in March 1976. These include the 8755, with an address latch, 2 KB of EPROM and 16 I/O pins, and the 8155 with 256 bytes of RAM, 22 I/O pins and a 14-bit programmable timer/counter.
What is the use of 8085?
8085 is pronounced as “eighty-eighty-five” microprocessor. It is an 8-bit microprocessor designed by Intel in 1977 using NMOS technology. It is used in washing machines, microwave ovens, mobile phones, etc.
How many opcodes are there in 8085?
As we know that the 8085 microprocessor is an 8-bit microprocessor. So, a total of 256 instruction codes can be generated using 8-bit combinations….Opcodes of 8085 Microprocessor.
| Instruction Code | Binary | Hexadecimal |
|---|---|---|
| Code instruction #2 | 0000 0001 | 01 H |
How many data and address lines are there in 8085?
The microprocessor 8085 has 16 bit address lines from A15-A8 and AD7-AD0. These lines are used to transfer 16 bit address of memory as well as 8-bit address of I/O ports.
What is interrupt call location?
When microprocessor receives any interrupt signal from peripheral(s) which are requesting its services, it stops its current execution and program control is transferred to a sub-routine by generating CALL signal and after executing sub-routine by generating RET signal again program control is transferred to main …
What is an interrupt structure?
Interrupt structure refers to the precedence of interrupts. The CPU can disable interrupts of a certain level and below, thus allowing an important interrupt to preempt an interrupt of lower priority, but not vice-versa. Most machine architectures do not allow the software to reconfigure the interrupt structure.