I've a few things in progress or just finished:
New Net City configuration:
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I've recently got my NNC cab working with my PS2, PS1, PC Engine and NEO Geo set-up. I'm using Shane's JAMMA adapters to connect the systems up and the adapters are awesome.
I've hooked up my PS2 solely for Gradius V, my PS1 solely for Gradius Gaiden, my PC Engine for all the shoot'em ups but Winds of Thunder in particular (and Dracula X: Rondo of Blood) and my Neo set up for Blazing Stars and Metal Slug.
For some reason my NNC will not play thje sound out of JAMMA boards which is really frustrating me. I have tried a Line Converter but that made no difference. It's strange that all my JAMMA adapters work but native JAMMA boards won't. I will struggle on!
Fixed Space Ace:
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My Space Ace died a death and sat doing nothing for a good few months. I eventually sussed out it was the Z80DART chip. Plugged in a new one and it fired up straight away. Took me ages to work it out though!
Fixing Salamander:
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I've have a Salamander board that was broke when I bought it many, many moons ago. i got round to having it fixed this month. it worked perfectly hooked up to my supergun but when I hooked it up to my cab there is no sound. Also, it made a "pop" noise and the graphics all screwed up. Strangely, moving the jumper from the stereo to mono pins on the Salamander board sorted out the vast majority of the graphics issues but did nothing for the sound. I will struggle on some more!
Also, not really a project, but I found out that Daytona USA was released on PS3 and was the best of conversions (running at 60fps) so I got it and have set my PS3 up just for that game

. It is very close to the original in terms of game-play and graphics. Let's Go Away!
Cheers
Lee