DI - Z80 instruction reference

diDisable interrupts 
Resets both interrupt flip-flops, preventing maskable interrupts from triggering.
1 byte · 4 cycles
SZHP/VNC ––––––
Changes no flag
Forms  di  
Resets both interrupt flip-flops, thus preventing maskable interrupts from triggering.
         .org 0x8000
        di
        halt