qa.hlp (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
FDISI/FNDISI
   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.
                                    -♦-