I have a IIe (boots as enhanced: Apple //e), motherboard 607-0187-A, and 80 column text card 607-0103-J.
They came together and I think they're compatible, but not sure.
When I boot to DOS 3.3 then type
PR#3 (capslock is on) to activate, the system restarts.
When I boot to ProDOS 1.1.1 then type
PR#3 I get "NO DEVICE CONNECTED".
When I boot with no disk then type
PR#3 the system hangs.
I've followed the "80-Column Text Card Manual For //e Only" and it looks like I'm doing things right. But I'm certainly not getting the results anticipated.
Do you have some tips to share?