This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
The DIP switches are used to configure your card for a series of different printers out there. I'll list those settings: DIP switch settings:DIP SWITCH POSITIONS 1 2 3 4 Epson Series and Star Gemini OFF ON ON ON NEC 8023/C, Itoh 8510/DMP 85 OFF ON ON OFF Centronics 739-1 OFF ON OFF ON Anadex Printers OFF ON OFF OFF Okidata 82A, 83A, 92, 93, 84 OFF OFF ON ON Okidata 84 w/o Step II Graphics OFF OFF OFF ON Apple Dot Matrix OFF OFF ON OFF IDS Printers (Any position)Notes: DIP switch ON = "+" side or set to right. Switch 1 controls MSB, the 8th bit. Setting switch 1 to 'ON' makes MSB not transmitted... ---------------------------- By: Joe Kohn The Harmonie printer drivers are available from Shareware Solutions II. As the publisher, the most frequently asked question I get is "Which Grappler+ dip switch setting should I use for an HP DeskJet?" According to those who use a Grappler+ to connect a DeskJet, the dip switch settings are:1-ON (up) 2-OFF (down) 3-OFF (down) 4-ON (up)---------------------------- By: Beverly Cadieux Joe, I've checked hundreds of Apple II Mail Group messages, and every time Grappler+ dip switches are mentioned in connection with DeskJets, people say they use OFF ON ON ON-- i.e. - + + + Since you are calling ON "up," we are probably using about the same setting. We call ON "down," (pushed in, toward the +). So your ON is probably our OFF. When switch 1 is ON the MSB is not transmitted to the printer. When the Switch 1 is OFF, MSB is under software control. AppleWorks requires that switch 1 be OFF to allow high ascii characters (enabled with a Control-I H in the interface code) to print. If it were ON, they would be prohibited. Switch one doesn't matter unless you want to send a high bit through. If you don't care about printing high ASCII (language characters, legal and math symbols, box edges), then it can be set either way. _________________________