We have a project that uses the Raspberry 1 with Raspbian (7) Wheezy on the sd card.
Since they don't sell Raspberry 1s no more we switched to the 3B+. Swapping the sd card to the new Raspberry obviously didn't boot but after copying the boot partition from a more recent Raspbian to the sd card, a little bit of tweaking we were able to boot the old Raspbian in the 3B+! Yay!
Problem: No ethernet or wifi.
Probably driver problems right? With no access to the Internet to run apt-get dist-upgrade (and hoping for the best) what are our remaining options?
Before you suggest, no, it's no viable to just install the recent Raspbian and copy the project to there. The project involves a lot of "messing" in a lot of system files and this "messing" is not documented anywhere and the guy who did the project already left. We tried that approach first but without success.