Cascade Data Transmission
Original Publication Date: 1985-Dec-01
Included in the Prior Art Database: 2005-Feb-19
This article describes a transfer of data from a host unit to one of serially connected display terminal units wherein a first command for changing an operational mode of the terminal unit to a pass mode is placed as a header of the data, and a second command for returning the operational mode from the pass mode to a normal mode is placed as an end block of the data. The display terminal has a main port connected to the host unit for communicating therewith and an auxiliary port connected to an another device (printer or display). To serially connect the display terminal units, the auxiliary port of one unit is connected to the main port of another unit.