Changes
Z80
,/* Opcodes */
|DEC (IY+N)||23||3||FD 35 XX
|-
|DEC BC||6||1||rowspan=4|------||0B||rowspan=4|Decrement (16-bit)||rowspan=4|ss=ss-1
|-
|DEC DE||6||1||||1B
|-
|DEC HL||6||1||||2B
|-
|DEC SP||6||1||||3B
|- style="background:#efefef;"
|DEC IX||10||2||rowspan=2|------||DD 2B||rowspan=2|Decrement||rowspan=2|xx=xx-1
|- style="background:#efefef;"
|DEC IY||10||2||||FD 2B
|-
|DI||4||1||------||F3||Disable Interrupts||
|EI||4||1||------||FB||Enable Interrupts||
|- style="background:#efefef;"
|EX (SP),HL||19||1||rowspan=5|------||E3||rowspan=5|Exchange||(SP)<->HL
|- style="background:#efefef;"
|EX (SP),IX||23||2||------||DD E3||(SP)<->xx
|- style="background:#efefef;"
|EX (SP),IY||23||2|| ||FD E3||
|- style="background:#efefef;"
|EX AF,AF'||4||1||------||08||AF<->AF'
|- style="background:#efefef;"
|EX DE,HL||4||1||------||EB||DE<->HL
|- style="background:#efefef;"
|EXX||4||1||------||D9||Exchange||qq<->qq' (except AF)
