{| class="wikitable" border="1"
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! Instruction !! Opcode !! NOPs !! Cycles !! S !! Z !! 5 !! H !! 3 !! P !! N !! C !! Effect !! Description
|-
| neg || 11101101 01***100 || 2 || 8 || + || + || + || + || + || V || 1 || + || a := 0 - a || Negate
|-
| nop || 00000000 || 1 || 4 || - || - || - || - || - || - || - || - || nothing ||No Operation
|}