Examining Galaga Dip Switch Function
for your Galaga video game
Computer Aided Testing System

 

	Galaga Repair
	Galaga Test Procedure
	Galaga Test Examples
	Galaga Test Table
	Galaga Power Supply
	Galaga Repair Blog
	Index of Links
	Other PCB's tested

Dip switches located at positions 6K and 6J, CPU Board

The dip switches on the Galaga CPU board are  easily read by turning on this module, which reads d0 and d1 on the data bus at hex addresses 6840 thru 6847. This data is processed, and then displayed in real-time on the dip switch images as shown. Activity, or transitions in the state of the switches are displayed as highlighted X's. This is useful for troubleshooting intermittent problems, and for verifying each switch has been physically tested.       Other tests from the test table can be called in order to trace the signals responsible for controlling this particular area of the PCB, if desired. For convenience, the schematic is available for reference while troubleshooting, and opens a new window, if selected.

All boards shall undergo this phase of testing, assuring the customer no hidden dip switch problems exist, and that board sets received upon repair have been checked for these types of errors, adding to to the reliability of circuit board operation.