EX - Z80 instruction reference

exExchange 
Swaps AF with AF', DE with HL, or the word at (SP) with HL, IX or IY.
Used in Multiply and divide, with the remainderZ80 assembly
Print a number in any base without helpZ80 assembly
Flappy birdZ80 assembly
 
SZHP/VNC ––––––
Changes no flag
Forms  ex af, af'   1 byte · 4 cycles 
Exchanges the 16-bit contents of AF and AF'.
 ex (sp), hl   1 byte · 19 cycles 
Exchanges (SP) with L, and (SP+1) with H.
 ex de, hl   1 byte · 4 cycles 
Exchanges the 16-bit contents of DE and HL.
 ex (sp),    2 bytes · 23 cycles 
Exchanges (SP) with IXL, and (SP+1) with IXH.
Pseudo-instructionsOther spellings the assembler accepts; each form shows the instruction it becomes.
  ex af', af   1 byte · 4 cycles 
Exchanges the 16-bit contents of AF and AF'.
 ex hl, (sp)   1 byte · 19 cycles 
Exchanges (SP) with L, and (SP+1) with H.
 ex hl, de   1 byte · 4 cycles 
Exchanges the 16-bit contents of DE and HL.
 ex , (sp)   2 bytes · 23 cycles 
Exchanges (SP) with IXL, and (SP+1) with IXH.
Operands ix The ix index register. You can also use iy, with the same instruction size and timing. More
         .org 0x8000
        ld a, 5
        ex af, af'
        halt