SWTP PR-40 Printer Interface Schematics
Submitted by Tom Owad on May 26, 2004 - 3:57pm.
Apple | Apple I | Organization
The above was the most commonly used schematic for connecting a printer. It allowed the user to switch between two outputs: to the video monitor, and to both the video monitor and the printer.
The below schematics functions as the prevous one, but adds a third switch setting for printing without sending output to the video monitor. This increased the data output speed to the printer.