Changes
Z80
,/* Letter E */
! Instruction !! Opcode !! NOPs !! Cycles !! S !! Z !! 5 !! H !! 3 !! P !! N !! C !! Effect !! Description
|-
| ei || 11111011 || 1 || 4 (4) || - || - || - || - || - || - || - || - || iff1 := 1, iff2 := 1 after the next instruction || Enable Interrupts
|-
| ex (sp),hl || 11100011 || 6 || 19 (4,3,4,3,5) || - || - || - || - || - || - || - || - || (sp) <=> hl ||rowspan=5|Exchange
|-
| ex (sp),I || 11i11101 11100011 || 7 || 23 (4,4,3,4,3,5) || - || - || - || - || - || - || - || - || (sp) <=> I
|-
| ex af,af' || 00001000 || 1 || 4 (4) || X || X || X || X || X || X || X || X || af <=> af'
|-
| ex de,hl || 11101011 || 1 || 4 (4) || - || - || - || - || - || - || - || - || de <=> hl
|-
| exx || 11011001 || 1 || 4 (4) || - || - || - || - || - || - || - || - || bc, de, hl <=> bc', de', hl'
|}
