◄Summary► ◄Timings► ──────────────────────────────────────────────────────────────────────────── Disable Interrupts 8087 Only Syntax: FDISI FNDISI Disables interrupts by setting the interrupt enable mask in the control word. This instruction has wait and no-wait versions. Since the 80287 and 80387 do not have an interrupt enable mask, the instruction is recognized but ignored on these coprocessors. -♦-