Computer Aided Testing System 

   This module is the actual software used by GLS1 Electronics during the testing of the 74LS259 chip located at position 5K on a Galaga video board. Adjustment of the vertical slide bar causes the address inputs A0 - A2 to assume the corresponding  binary value relative to the position selected. Selecting the state of the data will then route that data value to the correct decode output, resulting in changing the star speed / direction, or enable inverting the screen, (as in player 2 table operation). This interface is used during the Galaga Test Procedure. 

 Changes / Updates to this example are uploaded on a regular basis.