Appeal No. 1999-2637
Application 08/813,864
The instant invention discloses a method and apparatus
for supporting multiple display sessions through a single
address on a non-programmable-terminal (NPT) attached to a
host computer by a work station controller (WSC). Appellants’
Specification (Specification), page 2, line 36, to page 3,
lines 1-4. Multiple display sessions share a single address
or use shared addressing. Specification, page 5, lines 11-13.
The invention introduces a concept called focus.
Specification, page 5, lines 14-15. At any given time, only
one of the multiple display sessions has the focus. The
display session which has the focus communicates with the WSC
as if the session were the single display session available on
the shared address. Specification, page 5, lines 15-19. Any
session which does not have the focus is invisible from a
communication viewpoint until the focus is passed to the
session. Specification, page 5, lines 31-33. The focus is
passed from one session to another by a twinaxial focus change
command sent from the WSC to the NPT. If the WSC needs to
communicate with a second session which does not have the
focus, the WSC has to send the new twinaxial command
beforehand so that the second session gets the focus.
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007