Ben Cole wrote:
>
> Dear Vectorlist Gurus,
>
> My Asteroids Deluxe recently started having a little intermittent
> trouble with the buttons. While rotating and thrusting, pressing fire
> will interrupt the rotation of the ship, resulting in no rotate or fire.
> I put in brand new switch contacts but once in a while it will still do
> it. Sometimes it is very often other times once in a great while. I
> double checked the wire harness and connectors and they seem to be
> fine. ( .03 ohms from the switch contacts to the main board and self
> test seems ok, all switches respond )
> Has anyone ever run into this problem? Should I be looking at the inputs
> to the J10 and L10 data/sel/multiplexer, or the IC's ? Intermittent
> fault makes me think wiring, or switches, or main board connector, or
> wire traces on main board.
> Ben Cole
It's been three years since I had a similar problem, so my memory may be
faulty, but check out the POKEY chip. Does it consistently pass self
test? Replace it and see if your problem goes away.
Ray
