Asynchronous Terminals and Printer Processes Programming Manual

PROCEDURE CALLS FOR ACCESSING TERMINALS
Mode Switching
S5073-003
Application I/O Process LIU Device
WRITEREAD
(Read Screen)
WRITEREAD
WRITE
(EOT)
WRITEREAD
(Read Screen)
WRITEREAD
(ACK)
WRITEREAD
(ACK)
WRITEREAD
(ACK)
WRITEREAD
Completion
Block 1
Block 2
Last Block
EOT
WRITEREAD
Completion
•
•
Figure 3-3. Page Mode Example (continued)
Mode Switching
Use a SETMODE call to switch the mode of a 6520 or 6530 terminal
from conversational to page mode. The I/O process forwards the
SETMODE to the LIU when the application process issues the next
I/O request. To accomplish the mode switch, the protocol module
transmits the appropriate mode-setting sequence to the terminal.
Figure 3-4 illustrates this.
November 1987 3-11