STI              Set Interrupt Enable Flag           Flags: O D I T S Z A P C
                                                                1
          Logic:    IF  1
 
    STI sets the Interrupt Enable Flag, permitting the processor to
    recognize maskable interrupts. No other flags are affected. (Non-
    maskable interrupts are recognized no matter what the state of the
    interrupt enable flag.)
 
  --------------------------------------------------------------------------
   Operands                  Clocks   Transfers  Bytes   Example
   no operands                 2          -        1     STI
  --------------------------------------------------------------------------
 
       Notes:         A pending interrupt will not be recognized until
                      after the instruction following the STI executes.

Seealso:


 CLI 
 STC 
 CLC 
 CMC 
 STD 
 CLD 
 Flags