I am trying to update the operating system on an e80 chartplotter so that it will read new charts. Navionics sold me the charts on a cf card that will only work on an e80 with the latest 5.69 os, but they don't provide a card for the software upgrade, just the files for download. The e80 won't read new compact flash cards, so I have to erase the maps from an old one (under 2 gigabytes) that the e80 will recognize and then install from that. Anyway, if someone replaced an e80 and still has the old Navionics cf card lying in the basement I could use it. Please p.m. me if you can help. Thanks.