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Author Topic: Space Invaders Garbage Screen  (Read 504 times)

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Mike5906

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Space Invaders Garbage Screen
« 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!!!

Robbbert

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Re: Space Invaders Garbage Screen
« Reply #1 on: July 05, 2022, 02:54:16 am »
I have a Space Invaders Deluxe (Midway L-boardset) that is showing garbage on the screen. Here's a pic.
Where's the pic?