Ruby Wallboard interface settings for Polycomp displays

[Belinda Frick]

There are several different types of Polycomp wallboards. The Ruby Polycomp
interface has only been used with the simple boards, where the display is only
capable of scrolling and displaying text.

The serial settings for the wallboard are:
Baud rate: 9600
Data bits: 8
Stop bits: 1
Parity: None
Hardware flow control: None
Software flow control: None


The header and footer sent to the board are as follows:

Simple interface 1-line:
Data_Header=[00][01][00][03]
Data_Footer=[20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][04]

Simple interface 2-line:
Data_Header=[00][02][00][03][00]
Data_Footer=[20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][04]

Simple interface 4-line:
Data_Header=[00][01][00][03]
Data_Footer=[20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][20][04]