Williams Defender Arcade Prototype

You are right, seems to be a fix. It does not go through.
 
I also have just the interface board from 438758. Both this one and the one from the set I am working on have the 4-pin molex on the interface populated which I have never seen fitted elsewhere.

The board draws little enough power that the IDC20 is sufficient, but sketchy headers and ribbon cables can let the widget board lose power making the 6821 lose its configuration and appear to fail mid-game,
so it's "nice" to have the 4-pin header as redundant power.
 
Back
Top Bottom