Here's a snip about the embosser from the old MegaDots interface guide. Warren MBOSS-35 The MBOSS-35 was a medium speed single siged embosser. The MBOSS-35 is no longer produced. Despite its name, the MBOSS-35 is not related to the MBOSS-1. It was actually a prototype for the Index brailler. The MBOSS-35 is a serial embosser. Use a straight through male-to-female cable to connect the brailler to your PC. There are no DIP switches. All parameter changes are done from an external braille keyboard or from escape codes sent by a computer. The MBOSS-35 is rigged so that its default parameters are: 9600 baud, 8 data bits, 1 stop bit, and no parity (the preferred settings for MegaDots).