Soon, I'll be getting into collecting some arcade boards, but they're quite expensive, so when I stumbled upon this: http://www.raphnet.net/electronique/...p?section_id=0
I thought I'd give it a shot. This will convert an NES into a Nintendo VS. Unisystem arcade board minus the RGB PPU. Here's the problem - I'm stuck on this step: http://www.raphnet.net/electronique/...p?section_id=3
The NES I'm modifying for this project contains a Sharp LH5116DY-10 RAM chip for the PPU's RAM. I want to replace this with a Samsung KM6264BL-10 RAM chip salvaged from a dead Genesis Model 1. The problem is with the CE line. Here's the datasheet for the Sharp LH5116DY-10: http://www.datasheetcatalog.org/data...rp/mXqyqzu.pdf
And here's the datasheet for the Samsung KM6264BL-10: http://www.alldatasheet.com/datashee...G/KM6264B.html
Click the preview to see the datasheet.
The Sharp RAM chip has a single CE line, however the Samsung RAM chip has /CS1 and CS2, but no CE(CS is Chip Select). Which of these would correspond to the CE line on the Sharp RAM chip? 4K of the 8K of RAM in the Samsung chip is needed. Which of the two CS lines on the KM6264BL-10 do I need to solder to the CE line on the NES motherboard?