HOLY CR@P BATMAN!
My thread lives!
Anyhow...after the initial shock...
Nice work there @plasticrelic
Finally we have someone with a USA console modded!
Hope that was a spare SnK cart...you didn't just kill it for the case?
I hope you DIDN'T use the Sonic and Knuckles cart slot - it's a LOT more loose than a normal Genny slot and can lead to bad connections.
As for dirty cartriges - you'll need a gamebit screwdriver (some carts have tamper proof screws) and a 'polishing block' like this one...
http://www.maplin.co.uk/Module.aspx?Mod ... doy=search
After polishing the edge connector on the dirty cart, just wipe over with some alcohol (white spirit will do) and re assemble the cart.
I'd also recommend putting some epoxy resin on the ROM points on the Radica board where the cart slot wires lead to - the ROM spot takes a lot of stress and the wires can come loose easily. This can mean difficult re-soldering (or WORSE - broken tracks!)
As for the screen issues...I'll get back to ya'!
Hmm...K - I think I see what you mean about the Radica image being shifted...
It's actually DOWN by 1 pixel and LEFT by 4 pixels.
As for the 'rolling' image when the screen is white - this is probably the fact that it's just composite video.
I see some 'slight' rolling of the video image on a black screen (visible as horizontal ghosting across the screen) - but it's not as pronounced on my PAL unit due to the fact that a PAL composite signal is usually better quality (for colours at least) as it was invented AFTER colour T.V. (NTSC composite came before colour broadcasting)