What is it?

This is a pre-assembled board meant to be used as a replacement for faulty 'KNA65005-17' custom ICs used on Irem arcade systems like :

• 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)
• M81 (Dragon Breed, Hammerin Harry, X-Multiply)
• M82 (R-Type II, Major Title, Hammerin' Harry)
• M84 (R-Type II, Major Title, Hammerin' Harry, Cosmic Cop, Ken-Go)
• M85 (Pound For Pound)

Why did you make it?

I did it because the original part breaks very easily, making expensive and valuable arcade PCBs useless.

What makes it special?

The replacement has exactly the same functionality of the original part which is known to be prone to failure.It's the only replacement available so far, nobody else made it.