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Xdata on Dallas 390

Hi, I'm in desperate need of a known working example(hopefully in c, with a uv2 project would be even better), of different chip enacble pins running. I'm trying to run a display and RAM on a multiplexed bus, and although I can talk to my RAM, getting that second chip enable on port 4 just isnt working. I'm running the chip in a 512 contigiuos mode but anything showing the above. Please help if only for my sanity!