Irem 'KNA70H016(12)' reproduction

Description

For sale reproductions of the Irem custom IC marked  'KNA70H016(12)'.
The reproduction, designed by me, will substitute the custom IC marked  'KNA70H016(12)' used on certain Irem arcade hardware :
M72 (R-type, Ninja Spirit, AIr Duel, Image Fight, X Multiply, Legend of Hero Tonma, Dragon breed,  Hammerin' Harry, Gallop : Armed Police Unit,  Mr. HELI no Dai-Bouken)
M82 (R-Type II, Major Title, Hammerin' Harry)
M84 (R-Type II, Major Title, Hammerin' Harry, Cosmic Cop, Ken-Go)
M85 (Pound For Pound)
The replacement has exactly the same functionality of the original part which is known to be prone to failure.