The NEW Build Your Own Arcade Controls

Arcade Collecting => Restorations & repair => Topic started by: Mike5906 on July 04, 2022, 09:22:47 pm

Title: Space Invaders Garbage Screen
Post by: Mike5906 on July 04, 2022, 09:22:47 pm

I have a Space Invaders Deluxe (Midway L-boardset) that is showing garbage on the screen. Here's a pic.

I have checked on my scope and can see the reset line go low/high within a half second of power on. So I am confident the POR is working. I also can verify pin 6 is properly grounded on the daughter board.

I am assuming it it is a RAM chip, but when I pull the ROMs I do not get the bars you are supposed to get. I still get this garbage screen. I have a box full of 8080As, so I replaced the processor with several others as a test. No change.

I have an EPROM on order but has not arrived so I can't burn a test ROM quite yet.

Any advice? I am kinda stumped. Thanks in advance!!!

Title: Re: Space Invaders Garbage Screen
Post by: Robbbert on July 05, 2022, 02:54:16 am

Quote from: Mike5906 on July 04, 2022, 09:22:47 pm

I have a Space Invaders Deluxe (Midway L-boardset) that is showing garbage on the screen. Here's a pic.

Where's the pic?