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What is SIM and RIM instruction in microprocessor?
RIM stands for read interrupt mask and SIM stands for set interrupt mask.The SIM instruction is used to copy the contents of the accumulator into the interrupt mask.The RIM instruction is used to interpret the RST interrupt positions.
When microprocessor encounters HALT instruction what it do?
It floats the address and data buses, and enters THALT state, until an interrupt or reset occurs.
When interrupt occurs where is the address following the current instruction stored?
When an interrupt occurs, the address following the current instruction is stored on the stack.
What is sim in 8085?
The SIM instruction in the 8085 is Set Interrupt Mask. You can use it to set and clear the three interrupt masks for RST7.5, RST6.5, and RST5.5, as well as to set or clear the SOD (Serial Output Data) pin. You can also reset the pending RST7.5 interrupt, if desired.
Does an interrupt actually interrupt the execution of an instruction at any time during the instruction execution cycle?
Yes , an interrupt actually interrupt the execution of an instruction at any time during the instruction execution cycle.AS there the execution takes in 4 t cycles and t3 to take up the data and the 4th cycle for execution,if there is an interruption then there will be an interruption any time in any instruction execution cycle.
When an IRET instruction is executed what action takes place?
By ABDULLAH ABID Secretary Info & IT GLOBAL PEACE COUNCIL PAKISTAN. http://h.1asphost.com/gpcp/org The Interrupt-In-Service-Flag is set at the beginning of an interrupt-acknowledge cycle. It is reset by the IRET (Interrupt-RETurn) instruction. When IIS is set, interrupts are disabled. When the Status-register is read, IIS always reads as '0'.
What does Microprocessor does when it encounters an non maskable interrupt?
Finishes the current executing instruction and then serves the interrupt.
What instruction is used for checking the pending interrupt?
RIM
What is the instruction for exit in 8085 microprocessors?
There is no exit instruction in the 8085. Do you mean return, as in from a function or interrupt? If so, the instruction is RET.
What is an Interrupt Give two examples of an Interrupt?
Interrupt is nothing but according to the priority of ur instruction the processor will assign memory to it and will keep the bus line busy .
How do you disable Interrupt request lines?
The interrupt request lines on the 8085 (INTR, RST7.5, RST6.5, and RST5.5) can be disabled using the DI (Disable Interrupt) instruction. You re-enable with the EI instruction. Also, RST7.5, RST6.5, and RST5.5 can be individually enabled and disabled using the SIM (Set Interrupt Mask) and RIM (Read Interrupt Mask) instructions. The TRAP interrupt request line cannot be disabled.
How 8086 responds to an interrupt?
When the 8086 microprocessor receives an interrupt signal, it completes the execution of the current instruction and saves the address of the next instruction onto the stack. It then determines the appropriate interrupt vector from the Interrupt Vector Table (IVT) based on the interrupt type. The processor then transfers control to the interrupt service routine (ISR) associated with that interrupt. After the ISR has executed, the 8086 retrieves the saved address from the stack and resumes execution from where it was interrupted.
