80 col Apple ][

Any ideas from you Apple experts how I tell CP/M software to use an 80 column card? Display is 40 col from motherboard, all I get from 80 col card is a blinking cursor. No switches or id on 80 col card; it has 3 EPROM sockets, but only ROM2 & ROM3 are present. No reason why ROM1 should have been removed, so I'm hoping it was an option. Both video outputs and the built-in RF out all use RCA connectors, BTW :) And in reply to the question about SO239 (AKA UHF or 83 Series) connectors for video, the commercial (as opposed to homebrew) video out adapter on my PET uses one; other than that, in my experience the mass-produced systems used either RCA or proprietary connectors, and S100 & similar multi-card chassis used BNCs when they had internal video. mike