G - Physics
06
F
375/46, 354/236.
G06F 3/153 (2006.01) G09G 1/00 (2006.01) G09G 5/14 (2006.01)
Patent
CA 1295752
ABSTRACT In a dumb terminal to which an auxiliary device may be attached, improvements in display definition, in the transfer of data between a host computer and the terminal or an auxiliary device, and in character generation memory. In the area of display definition, pages may be mapped onto the terminal's display memory and viewports may be mapped onto pages. Page and viewport definition are independent of each other and settable modes permit a viewport to follow the active position. In the area of transfer of data, the source of data for the host computer and the destination of data from the host computer may be specified independently. Improvements in flow control ensure that the host computer can always change the destination of data and gain control of the terminal. Improvements in access control ensure that neither the terminal nor the auxiliary device can monopolize transfer between it and the host. Moreover, transfer can proceed transparently even when non-ASCII 8-bit codes or a 7-bit host-terminal link are involved. Finally, a protocol permits one portion of character generation memory to be copied to another portion thereof.
543126
Mooney Robert C.
Peirent Richard J.
Smart & Biggar
Spotware Technology Corporation
LandOfFree
Terminal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Terminal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Terminal will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1299180