This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
The best parallel card is no parallel card. The IIGS is has serial ports and the best way to use parallel printers is with a serial to parallel converter. Global Computer Supplies, http://www.globalcomputer.com/ , has a bi- directional model (TAC6180) that is excellent. It supports serial rates of 300- 57600 bps, so using a fast serial driver on the GS can get you printing at 57600 bps. I doubt most printers go faster than this. ---------------------------- By: Michael Pender The later-model PanaPrinters included both serial and parallel ports. They shipped with an external parallel interface, but the interface is part of a parallel-to-serial daughterboard that plugs into an internal serial interface. It is not necessary to add a parallel card. Open the case, remove the daughterboard and plug the serial printer cable into the Dsub-25 serial connector on the main board.