Processor Cycle

What is meant by processor cycle?

Processor Cycle is a term used to describe one aspect of a processor's performance: the number of clock cycles that happen when an instruction is being executed.

SIM Instruction in 8085 microprocessor

What is the function performed by SIM Instruction?

The SIM instruction in the 8085 microprocessor is used to set (SIM) the interrupt mask. With SIM, you can mask or unmask RST5.5, RST6.5, and RST7.5, you can reset the pending RST7.5 flip flop, and you can set or reset the SOD (Serial Output Data) pin.

DAD instruction or command

What is a DAD instruction?

DAD - Double Register Add is used to add registers and is used in the assembly programming language.

For example:

Double Add HL to HL

difference between hardware and software interrupts in 8085 microprocessor

Differentiate between hardware interrupts and software interrupts of 8085.

• The software interrupt is initiated by the main program, but the hardware interrupt is initiated by an external device.
• In 8085, the software interrupt cannot be disabled or masked but the hardware interrupt except TRAP can be disabled or masked.