Di instruction in 8085

What is EI and DI in microprocessor? DI(Disable Interrupt): - The interrupt enable flip-flop is reset and all the interrupts except the TRAP are disabled. No flags are affected. Eg: - DI. 4. EI(Enable Interrupt): - The interrupt enable flip-flop is set and all interrupts are enabled. fileslib. The DI instruction stands for “ Disable Interrupts ”. It is a 1-Byte instruction. When this instruction is executed, the IE flip-flop is reset. This disables the 8085 interrupt system except for the TRAP pin. (2) EI Instruction – explanation and its use in assembly programs are presented. (3) DI Duration: 15:42 Posted:
This instruction s used to enable all maskable interrupts. Whenever an interrupt is acknowledged, the interrupt enable flip-flop will reset and
The interrupt enable flip-flop is reset and all the interrupts except the TRAP are disabled. No flags are affected. Example: DI. EI, none, Enable interrupts. Opcode: Operand What are vectored and non vectored interrupts? ➢ In vectored interrupts, the processor automatically branches to the specific address in. response to an interrupt. ➢ In vectored interrupts, the manufacturer fixes the address of the ISR to which the. program control is to be transferred. ➢ The TRAP, RST 7.5, RST 6.5 and RST 5.5 are vectored interrupts.