 |
Claims  |
|
|
What is claimed is:
1. A communication system for creating substantially identical
simultaneously interactive displays at a plurality of locations
comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a communication line,
and a first means for transmitting information to a second location via
the communication line,
a functionally similar second terminal at a second of said locations
comprising a second interactive display means, a second local input means
for input of information to be displayed by said second display means, a
second communications buffer for receiving information from said
communication line, and a second means for transmitting information to
said first location via said communication line,
means at said first terminal for continuously receiving display
instructions from said first input means and said first communication
buffer and for implementing such instructions on said first display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed,
means at said first terminal for communicating display instructions entered
at said first input means to the communications buffer of the second
terminal via the communication line, said instructions being communicated
upon receipt from said first input means, said instructions specifying a
change in the information to be displayed by the second display means and
a location of said change in the information displayed,
means at said second terminal for continuously receiving display
instructions from said second input means and said second communication
buffer and for implementing such instructions on said second display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed, and
means at said second terminal for communicating display instructions
entered at said second input means to the communications buffer of the
first terminal via the communication line, said instructions being
communicated upon receipt from said second input means, said instructions
specifying a change in the information to be displayed by the first
display means and a location of said change in the information displayed,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
2. The communication system of claim 1 wherein the means at each terminal
for continuously receiving display instructions from an input means and a
communication buffer comprises means for polling said input means and
communication buffer.
3. The communication system of claim 1 wherein display instructions are
communicated from one terminal to another using message packets.
4. The communication system of claim 1 wherein display instructions are
communicated from one terminal to another using message packets and the
system further comprises:
means at each terminal for assigning a number to each message packet
transmitted to another terminal,
means for storing the message packets transmitted from a terminal,
means for checking for errors in the message packets received at a
terminal,
means for requesting that a message packet be sent again from a
transmitting terminal if the error checking means at a receiving terminal
detects an error in a received message packet, and
means for retrieving a stored message packet upon receipt of a request for
retransmission and for transmitting said packet again.
5. The communication system of claim 4 wherein the message packet includes
at least three copies of the message packet number and the system further
comprises means at each terminal for reading each copy of the message
packet number and determining if one value of the message packet number
appears a majority of times.
6. The communication system of claim 4 further comprising at least one
additional terminal similar to the first and second terminals and
communicating with said first and second terminals via said communication
line wherein the message packet also includes at least three copies of an
identification of the terminal from which the packet is transmitted and
the system further comprises means at each terminal for reading each copy
of the terminal identification and determining if one value of the
terminal identification appears a majority of times.
7. The communication system of claim 1 wherein the first terminal and the
second terminal are controlled by functionally similar programs each of
which is executing asynchronously at a different one of the terminals.
8. A communication system for creating substantially identical
simultaneously interactive displays at two locations comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a full-duplex
communication line, and a first means for transmitting information via the
full-duplex communication line,
a functionally similar second terminal at a second of said locations
comprising a second interactive display means, a second local input means
for input of information to be displayed by said second display means, a
second communications buffer for receiving information from said
communication line, and a second means for transmitting information via
said communication line,
means at said first terminal for repeatedly polling said first input means
and said first communication buffer for display instructions and for
implementing such instructions on said first display means upon receipt
thereof,
means at said first terminal for communicating display instructions entered
at said first input means to the communications buffer of the second
terminal via the communication line,
means at said second terminal for repeatedly polling said second input
means and said second communication buffer for display instructions and
for implementing such instructions on said second display means upon
receipt thereof,
means at said second terminal for communicating display instructions
entered at said second input means to the communications buffer of the
first terminal via the communication line,
a central processor at said first terminal operating under a stored program
and controlling said first display means, said first input means, said
first communications buffer, said first transmitting means, said polling
means, and said communicating means, and
a central processor at said second terminal operating under a stored
program and controlling said second display means, said second input
means, said second communications buffer, said second transmitting means,
said polling means, and said communicating means, said stored programs
under which the first and second terminals operate being functionally
similar,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
9. The communication system of claim 8 wherein display instructions are
communicated from one terminal to another using message packets.
10. The communication system of claim 8 wherein display instructions are
communicated from one terminal to another using message packets and the
system further comprises:
means at each terminal for assigning a number to each message packet
transmitted to another terminal,
means for storing the message packets transmitted from a terminal,
means for checking for errors in the message packets received at a
terminal,
means for requesting that a message packet be sent again from a
transmitting terminal if the error checking means at a receiving terminal
detects an error in a received message packet, and
means for retrieving a stored message packet upon receipt of a request for
retransmission and for transmitting said packet again.
11. The communication system of claim 9 wherein the message packet includes
at least three copies of the message packet number and the system further
comprises means at each terminal for reading each copy of the message
packet number and determining if one value of the message packet number
appears a majority of times.
12. The communication system of claim 11 further comprising at least one
additional terminal similar to the first and second terminals and
communicating with said first and second terminals via said communication
line wherein the message packet also includes at least three copies of an
identification of the terminal from which the packet is transmitted and
the system further comprises means at each terminal for reading each copy
of the terminal identification and determining if one value of the
terminal identification appears a majority of times.
13. The system of claim 8 wherein the display instructions transmitted from
one terminal to another specify a change in the information to be
displayed by a display means and a location of said change in the
information displayed.
14. The system of claim 8 wherein the stored programs under which the first
and second terminals operate are the same.
15. In a communication system comprising:
a first terminal at a first location comprising a first interactive display
means, a first local input means for input of information to be displayed
by said first display means, a first communications buffer for receiving
information from a communication line, and a first means for transmitting
information to a second location via the communication line,
a functionally similar second terminal at a second location comprising a
second interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting information to said first
location via said communication line,
a method of creating substantially identical simultaneously interactive
displays at the two locations comprising the steps of:
continuously receiving display instructions at said first terminal from
said first input means and said first communication buffer and
implementing such instructions on said first display means upon receipt
thereof, said instructions specifying a change in the information to be
displayed by said display means and a location of said change in the
information displayed,
communicating display instructions entered at said first input means to the
communications buffer of the second terminal via the communication line,
said instructions being communicated upon receipt from said first input
means, said instructions specifying a change in the information to be
displayed by the second display means and a location of said change in the
information displayed,
continuously receiving display instructions at said second terminal from
said second input means and said second communication buffer and
implementing such instructions on said second display means upon receipt
thereof, said instructions specifying a change in the information to be
displayed by said display means and a location of said change in the
information displayed, and
communicating display instructions entered at said second input means to
the communications buffer of the first terminal via the communication
line, said instructions being communicated upon receipt from said second
input means, said instructions specifying a change in the information to
be displayed by the first display means and a location of said change in
the information displayed,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
16. The method of claim 15 wherein the step of continuously receiving
display instructions from an input means and a communication buffer
comprises the step of polling said input means and communication buffer.
17. The method of claim 15 wherein display instructions are communicated
from one terminal to another using message packets.
18. The method of claim 15 wherein display instructions are communicated
from one terminal to another using message packets and the method further
comprises the steps of:
assigning at each terminal a number to each message packet transmitted to
another terminal,
storing the message packets transmitted from a terminal,
checking for errors in the message packets received at a terminal,
requesting that a message packet be sent again from a transmitting terminal
if an error checking means at a receiving terminal detects an error in a
received message packet,
retrieving a stored message packet upon receipt of a request for
retransmission, and
transmitting said packet again.
19. The method of claim 18 wherein the message packet includes at least
three copies of the message packet number and the method further comprises
the steps of reading each copy of the message packet number and
determining if one value of the message packet number appears a majority
of times.
20. The method of claim 19 wherein at least one additional terminal similar
to the first and second terminals communicates with said first and second
terminals via said communication line and the message packet also includes
at least three copies of an identification of the terminal from which the
packet is transmitted and the method further comprises the steps of
reading each copy of the terminal identification and determining if one
value of the terminal identification appears a majority of times.
21. The method of claim 15 wherein the first terminal and the second
terminal are controlled by functionally similar programs each of which is
executing asynchronously at a different one of the terminals.
22. A communication system for creating substantially identical
simultaneously interactive displays at a plurality of locations
comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a communication line,
and a first means for transmitting information to a second location via
the communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting information to said first
location via said communication line,
means at said first terminal for continuously receiving display
instructions from said first input means and said first communication
buffer and for implementing such instructions on said first display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed, and said means for continuously
receiving display instructions comprising a means for polling said first
input means and said first communication buffer,
means at said first terminal for communicating display instructions entered
at said first input means to the communications buffer of the second
terminal via the communication line, said instructions being communicated
upon receipt from said first input means, said instructions specifying a
change in the information to be displayed by the second display means and
a location of said change in the information displayed,
means at said second terminal for continuously receiving display
instructions from said second input means and said second communication
buffer and for implementing such instructions on said second display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed, and said second means for
continuously receiving display instructions comprising a means for polling
said second input means and said second communication buffer, and
means at said second terminal for communicating display instructions
entered at said second input means to the communications buffer of the
first terminal via the communication line, said instructions being
communicated upon receipt from said second input means, said instructions
specifying a change in the information to be displayed by the first
display means and a location of said change in the information displayed,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
23. A communication system which utilizes message packets for creating
substantially identical simultaneously interactive displays at a plurality
of locations comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a communication line,
and a first means for transmitting information to a second location via
the communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting information to said first
location via said communication line,
means at said first terminal for continuously receiving display
instructions from said first input means and said first communication
buffer and for implementing such instructions on said first display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed,
means at said first terminal for communicating in message packets display
instructions entered at said first input means to the communications
buffer of the second terminal via the communication line, said
instructions being communicated upon receipt from said first input means,
said instructions specifying a change in the information to be displayed
by the second display means and a location of said change in the
information displayed,
means at said second terminal for continuously receiving display
instructions from said second input means and said second communication
buffer and for implementing such instructions on said second display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed, and
means at said second terminal for communicating in message packets display
instructions entered at said second input means to the communications
buffer of the first terminal via the communication line, said instructions
being communicated upon receipt from said second input means, said
instructions specifying a change in the information to be displayed by the
first display means and a location of said change in the information
displayed,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
24. A communication system which utilizes message packets for creating
substantially identical simultaneously interactive displays at a plurality
of locations comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a communication line,
and a first means for transmitting message packets to a second location
via the communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting message packets to said first
location via said communication line,
means at said first terminal for continuously receiving display
instructions from said first input means and said first communication
buffer and for implementing such instructions on said first display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed,
means at said first terminal for communicating in message packets display
instructions entered at said first input means to the communications
buffer of the second terminal via the communication line, said
instructions being communicated upon receipt from said first input means,
said instructions specifying a change in the information to be displayed
by the second display means and a location of said change in the
information displayed,
means at said second terminal for continuously receiving display
instructions from said second input means and said second communication
buffer and for implementing such instructions on said second display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed,
means at said second terminal for communicating in message packets display
instructions entered at said second input means to the communications
buffer of the first terminal via the communication line, said instructions
being communicated upon receipt from said second input means, said
instructions specifying a change in the information to be displayed by the
first display means and a location of said change in the information
displayed,
means at each terminal for assigning a number to each message packet
transmitted to another terminal,
means for storing the message packets transmitted from a terminal,
means for checking for errors in the message packets received at a
terminal,
means for requesting that a message packet be sent again from a
transmitting terminal if the error checking means at a receiving terminal
detects an error in a received message packet, and
means for retrieving a stored message packet upon receipt of a request for
retransmission and for transmitting said packet again,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
25. The communication system of claim 24 wherein the message packet
includes at least there copies of the message packet number and the system
further comprises means at each terminal for reading each copy of the
message packet number and determining if one value of the message packet
number appears a majority of times.
26. The communication system of claim 23 further comprising at least one
additional terminal similar to the first and second terminals and
communicating with said first and second terminals via said communication
line wherein the message packet also includes at least three copies of an
identification of the terminal from which the packet is transmitted and
the system further comprises means at each terminal for reading each copy
of the terminal identification and determining if one value of the
terminal identification appears a majority of times.
27. A communication system for creating substantially identical
simultaneously interactive displays at a plurality of locations
comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a communication line,
and a first means for transmitting information to a second location via
the communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting information to said first
location via said communication line,
means at said first terminal for continuously receiving display
instructions from said first input means and said first communication
buffer and for implementing such instructions on said first display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed,
means at said first terminal for communicating display instructions entered
at said first input means to the communications buffer of the second
terminal via the communication line, said instructions being communicated
upon receipt from said first input means, said instructions specifying a
change in the information to be displayed by the second display means and
a location of said change in the information displayed,
means at said second terminal for continuously receiving display
instructions from said second input means and said second communication
buffer and for implementing such instructions on said second display means
upon receipt thereof, said instructions specifying a change in the
information to be displayed by said display means and a location of said
change in the information displayed, and
means at said second terminal for communicating display instructions
entered at said second input means to the communications buffer of the
first terminal via the communication line, said instructions being
communicated upon receipt from said second input means, said instructions
specifying a change in the information to be displayed by the first
display means and a location of said change in the information displayed,
and
functionally similar programs controlling said first and second terminals,
each of which programs is executing asyncronously at a different one of
the terminals,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
28. A communication system for creating substantially identical
simultaneously interactive displays at two locations comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a full-duplex
communication line, a first means for generating display instructions
formed of message packets, and a first means for transmitting information
via the full-duplex communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, a second means for generating display instructions formed of message
packets, and a second means for transmitting information via said
communication line,
means at said first terminal for repeatedly polling said first input means
and said first communication buffer for display instructions and for
implementing such instructions on said first display means upon receipt
thereof,
means at said first terminal for communicating in message packets display
instructions entered at said first input means to the communications
buffer of the second terminal via the communication line,
means at said second terminal for repeatedly polling said second input
means and said second communication buffer for display instructions and
for implementing such instructions on said second display means upon
receipt thereof,
means at said second terminal for communicating in message packets display
instructions entered at said second input means to the communications
buffer of the first terminal via the communication line,
a central processor at said first terminal operating under a stored program
and controlling said first display means, said first input means, said
first communications buffer, said first transmitting means, said polling
means, and said communicating means, and
a central processor at said second terminal operating under a stored
program and controlling said second display means, said second input
means, said second communications buffer, said second transmitting means,
said polling means, and said communicating means, said stored programs
under which the first and second terminals operate being functionally
similar,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
29. A communication system for creating substantially identical
simultaneously interactive displays at two locations comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a full-duplex
communication line, a first means for generating display instructions
formed of message packets, and a first means for transmitting message
packets via the full-duplex communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, a second means for generating display instructions formed of message
packets, a second means for generating display instructions formed of
message packets, and a second means for transmitting message packets via
said communication line,
means at said first terminal for repeatedly polling said first input means
and said first communication buffer for display instructions and for
implementing such instructions on said first display means upon receipt
thereof,
means at said first terminal for communicating in message packets display
instructions entered at said first input means to the communications
buffer of the second terminal via the communication line,
means at said second terminal for repeatedly polling said second input
means and said second communication buffer for display instructions and
for implementing such instructions on said second display means upon
receipt thereof,
means at said second terminal for communicating in message packets display
instructions entered at said second input means to the communications
buffer of the first terminal via the communication line,
a central processor at said first terminal operating under a stored program
and controlling said first display means, said first input means, said
first communications buffer, said first transmitting means, said polling
means, and said communicating means,
a central processor at said second terminal operating under a stored
program and controlling said second display means, said second input
means, said second communications buffer, said second transmitting means,
said polling means, and said communicating means, said stored programs
under which the first and second terminals operate being functionally
similar,
means at each terminal for assigning a number to each message packet
transmitted to another terminal,
means for storing the message packets transmitted from a terminal,
means for checking for errors in the message packets received at a
terminal,
means for requesting that a message packet be sent again from a
transmitting terminal if the error checking means at a receiving terminal
detects an error in a received message packet, and
means for retrieving a stored message packet upon receipt of a request for
retransmission and for transmitting said packet again,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
30. The communication system of claim 29 wherein the message packet
includes at least three copies of the message packet number and the system
further comprises means at each terminal for reading each copy of the
message packet number and determining if one value of the message packet
number appears a majority of times.
31. The communication system of claim 28 further comprising at least one
additional terminal similar to the first and second terminals and
communicating with said first and second terminals via said communication
line wherein the message packet also includes at least three copies of an
identification of the terminal from which the packet is transmitted and
the system further comprises means at each terminal for reading each copy
of the terminal identification and determining if one value of the
terminal identification appears a majority of times.
32. A communication system for creating substantially identical
simultaneously interactive displays at two locations comprising:
first terminal at a first of said locations comprising a first interactive
display means, a first local input means for input of information to be
displayed by said first display means, a first communications buffer for
receiving information from a full-duplex communication line, and a first
means for transmitting information via the full-duplex communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting information via said
communication line,
means at said first terminal for repeatedly polling said first input means
and said first communication buffer for display instructions and for
implementing such instructions on said first display means upon receipt
thereof, said instructions specifying a change in the information to be
displayed by said display means and a location of said change in the
information displayed,
means at said first terminal for communicating display instructions entered
at said first input means to the communications buffer of the second
terminal via the communication line, said instructions specifying a change
in the information to be displayed by said display means and a location of
said change in the information displayed,
means at said second terminal for repeatedly polling said second input
means and said second communication buffer for display instructions and
for implementing such instructions on said second display means upon
receipt thereof, said instructions specifying a change in the information
to be displayed by said display means and a location of said change in the
information displayed,
means at said second terminal for communicating display instructions
entered at said second input means to the communications buffer of the
first terminal via the communication line, said instructions specifying a
change in the information to be displayed by said display means and a
location of said change in the information displayed,
a central processor at said first terminal operating under a stored program
and controlling said first display means, said first input means, said
first communications buffer, said first transmitting means, said polling
means, and said communicating means, and
a central processor at said second terminal operating under a stored
program and controlling said second display means, said second input
means, said second communications buffer, said second transmitting means,
said polling means, and said communicating means, said stored programs
under which the first and second terminals operate being functionally
similar,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
33. A communication system for creating substantially identical
simultaneously interactive displays at two locations comprising:
a first terminal at a first of said locations comprising a first
interactive display means, a first local input means for input of
information to be displayed by said first display means, a first
communications buffer for receiving information from a full-duplex
communication line, and a first means for transmitting information via the
full-duplex communication line,
a second terminal at a second of said locations comprising a second
interactive display means, a second local input means for input of
information to be displayed by said second display means, a second
communications buffer for receiving information from said communication
line, and a second means for transmitting information via said
communication line,
means at said first terminal for repeatedly polling said first input means
and said first communication buffer for display instructions and for
implementing such instructions on said first display means upon receipt
thereof,
means at said first terminal for communicating display instructions entered
at said first input means to the communications buffer of the second
terminal via the communication line,
means at said second terminal for repeatedly polling said second input
means and said second communication buffer for display instructions and
for implementing such instructions on said second display means upon
receipt thereof,
means at said second terminal for communicating display instructions
entered at said second input means to the communications buffer of the
first terminal via the communication line,
a central processor at said first terminal operating under a stored program
and controlling said first display means, said first input means, said
first communications buffer, said first transmitting means, said polling
means, and said communicating means, and
a central processor at said second terminal operating under a stored
program and controlling said second display means, said second input
means, said second communications buffer, said second transmitting means,
said polling means, and said communicating means, said stored programs
under which the first and second terminals operate being the same,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
34. In a communication system comprising:
a first terminal at a first location comprising a first interactive display
means, a first local input means for input of information to be displayed
by said first display means, a first communications buffer for receiving
information from a communication line, and a first means for transmitting
information to a second location via the communication line, and
a second terminal at a second location comprising a second interactive
display means, a second local input means for input of information to be
displayed by said second display means, a second communications buffer for
receiving information from said communication line, and a second means for
transmitting information to said first location via said communication
line,
a method of creating substantially identical simultaneously interactive
displays at the two locations comprising the steps of:
polling said first input means and said first communication buffer to
continuously receive display instructions therefrom and implementing such
instructions on said first display means upon receipt thereof, said
instructions specifying a change in the information to be displayed by
said display means and a location of said change in the information
displayed,
communicating display instructions entered at said first input means to the
communications buffer of the second terminal via the communication line,
said instructions being communicated upon receipt from said first input
means, said instructions specifying a change in the information to be
displayed by the second display means and a location of said change in the
information displayed,
polling said second input means and said second communication buffer to
continuously receive display instructions therefrom and implementing such
instructions on said second display means upon receipt thereof, said
instructions specifying a change in the information to be displayed by
said display means and a location of said change in the information
displayed, and
communicating display instructions entered at said second input means to
the communications buffer of the first terminal via the communication
line, said instructions being communicated upon receipt from said second
input means, said instructions specifying a change in the information to
be displayed by the first display means and a location of said change in
the information displayed,
whereby the same display is generated and updated substantially
simultaneously at each of said first and second terminals.
35. In a communication system comprising:
a first terminal at a first location comprising a first interactive display
means, a first local input means for input of information to be displayed
by said first display means, a first communications buffer for receiving
information from a communication line, and a first means for transmitting
information to a second location via the communication line, and
a second terminal at a second location comprising a second interactive
display means, a second local input means for input of information to be
displayed by said second display means, a second communications buffer for
receiving information from said communication line, and a second means for
transmitting information to said first location via said communication
line,
a me | | |
