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Title: Twin Cobra issues Post by: jessiewonka on April 11, 2015, 03:58:57 pm I picked up a Twin Cobra pcb which boots, plays, has sound, but the image is very faint and flickery and kinda jacked. Prodded around but nothing yet.
(http://jessiejohnson.net/arcade/twin-cobra/stack.jpg) (http://jessiejohnson.net/arcade/twin-cobra/screen.jpg) Title: Re: Twin Cobra issues Post by: jessiewonka on April 11, 2015, 04:13:47 pm (http://jessiejohnson.net/arcade/twin-cobra/test.jpg)
Title: Re: Twin Cobra issues Post by: iankellogg on April 11, 2015, 07:05:15 pm just to get the easy question out of the way. Is this monitor a known working monitor?
I think that might be ram. im really not sure though, that is pretty crazy looking. Title: Re: Twin Cobra issues Post by: jessiewonka on April 11, 2015, 07:08:13 pm Over at the Shmups forum system11 offered: "This, I had one of those bootlegs and it doesn't have a video ground. Create a wire link from 14 to the ground plane similar to what someone did on mine."
This indeed cured it. But I may have made it worse as now player one stick only moves up/right, and player two anything gives a "tilt" message on the screen and resets the game. Eek... Title: Re: Twin Cobra issues Post by: iankellogg on April 11, 2015, 07:09:51 pm Yeah that makes sense. I am surprised it didn't have the ground. Pretty amazing you even got that much video without the ground.
Title: Re: Twin Cobra issues Post by: jessiewonka on April 11, 2015, 07:42:14 pm Ok it's fixed, I used too heavy of a gauge wire and the connector wasn't seating all the way. ::)
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