Namco '6xA1' reproduction

Another reproduction of a custom IC, or better, this is a 3-in-1 replacement of the Namco MCUs marked '60A1', '63A1' and '64A1'.

 

They are mostly the same part with identical package (DIP40) and pinout but they are not interchangeable.

• '60A1' found on Pac-Land, Dragon Buster, Sky Kid (all revisions except early one), Sky Kid Deluxe, Alien Sector, Baraduke, Metrocross,  Rolling Thunder and all other System86 games.

• '63A1' found on first revision of Sky Kid.

• '64A1' found on all System 1 games (Splatterhouse, Galaga88, Pac-Mania, etc)

Needless to say the original part is very prone to failure (especially the '64A1')

My replacement covers all three MCUs, you can simply select the desidered one via a dipswitch:

Here's testing of the replacement on different boards :


'60A1' on Rolling Thunder :

'63A1' on Sky Kid (first revision) 

'64A1' on Splatterhouse :

A special thank to my friend 'uchopon' for helping me to achieve this result.