Hello,
Seems I've run into a slight issue that I'm also curious about.
My ImageWriter DIPs are set to the defaults (11101011 0010) and so are my Super Serial DIPS (terminal mode, 0001011 1001100). However, in AppleWriter 2.1 when printing with the defacto 9600,8,N,1 setting, nothing is printed. It's only when I set DIP 5 on the printer to zero (ignores 8th data bit) that it prints correctly.
Not that this is a serious issue, I'm just curious if this is the correct setup and why it's happening. I'd like to learn about parity and whatnot :)