ei

Control Flow // EI (Enable Interrupts)

0xFB - u251

Description

Sets both interrupt flip-flops, thus allowing maskable interrupts to occur. An interrupt will not occur until after the immediatedly following instruction.

T States	Bytes
4	1

Condition Bits Affected

None.

source

{
  "flags": {
    "S": "unaffected",
    "Z": "unaffected",
    "H": "unaffected",
    "P/V": "unaffected",
    "N": "unaffected",
    "C": "unaffected"
  },
  "unaffected": true,
  "operation": "ei",
  "opcode": "ei",
  "operand": [],
  "code": "FB",
  "bytes": 1,
  "time": 4,
  "description": "Sets both interrupt flip-flops, thus allowing maskable interrupts to occur. An interrupt will not occur until after the immediatedly following instruction.",
  "category": "Control Flow",
  "subCategory": "EI (Enable Interrupts)"
}