1. A command line interface.
2. A 6502 instruction that clears the I (interrupt disable) flag, allowing IRQs to interrupt the code.
- Function: 0 => I
- Updates flags: . . . . . I . .
- Opcode number: impl $58
Caution: Do not confuse this with the cli instruction of x86, which does the exact opposite.
As opposed to: SEI
See also: 6502 instructions | 6502 addressing modes