Synchronization of crt controller chips

Details Synchronization of crt controller chips Synchronization of crt controller chips

G - Physics

09

G

354/231, 354/236

G09G 1/16 (2006.01) G09G 5/12 (2006.01)

Patent

CA 1172386

SYNCHRONIZATION OF CRT CONTROLLER CHIPS ABSTRACT Two controller units controlling a single input/ output device such as a cathode ray tube (CRT) are synchronized by a command signal. Upon appearance of the command signal, the slave controller unit, which may have been running unsynchronized with the master controller, is stopped at the time for vertical retrace and remains stopped until vertical retrace time for the master controller. At this point, the slave controller is restarted in synchronism with the master controller and remains synchronized so long as both master and slave receive the same clock and the same screen refresh parameters.

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