Boots – shoes – and leggings
Patent
1986-09-12
1990-09-04
Harkcom, Gary V.
Boots, shoes, and leggings
364140, 340717, 34082502, G06F 3037
Patent
active
049549669
ABSTRACT:
In a dumb terminal to which an auxiliary device may be attached, improvements in display definitions. 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.
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IBM Product Announcement, IBM 3161 and IBM 3163 ASCII Display Strategies, IBM, Jun. 18, 1981.
ADM 12 VDT User's Reference Manual, Lear-Siegler, Inc. Anaheim, CA 1983, pp. 3-27 to 3-29.
Televideo VDT Operator's Manual, Model 924, Televideo Systems, Inc. Sunnyvale, CA 1983, pp. 50-54.
Mooney Robery C.
Peirent Richard J.
Harkcom Gary V.
Nelson Gordon E.
Shanahan Michael H.
Wang Laboratories, Inc.
Zimmerman Mark K.
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