AM3270/TR3271 Reference Manual

Details of the ITI Protocol
AM3270 Subdevice Protocols
4–4 086705 Tandem Computers Incorporated
The following SETMODE functions are used to set certain terminal characteristics for
this protocol:
SETMODE 8 Set transfer mode—default is conversational.
parameter 1 0 conversational mode.
1 block mode.
SETMODE 11 Set BREAK ownership—default is 0.
parameter 1 0 disable BREAK. cpu,pin = enable BREAK.
parameter 2 0 normal mode, any type file access is permitted (default).
1 BREAK mode, only BREAK-type access permitted.
SETMODE 12 Set terminal access mode:
parameter 1 0 normal mode, any type file access is permitted.
1 BREAK mode, only BREAK-type access permitted.
And file access type:
parameter 2 0 normal access to terminal.
1 BREAK access to terminal.
SETMODE 20 Display or nondisplay of keyboard data.
parameter 1 0 causes the next WRITE to the terminal to be followed by a
non-display video attribute which in turn inhibits the
display of all characters following the current cursor
position.
1 (default) causes the next WRITE to the terminal to be
preceded by a display video attribute which in turn allows
the display of all characters following the current cursor
position.
Note that since video attributes do occupy a character space on the screen (the
current cursor position), a blank occurs at the attribute position. This allows the
application program to use non-displayed passwords.
SETPARAM 3 (BREAK
Indication)
SETPARAM 3 can be used to set/fetch the parameters for handling the BREAK
indication received from a terminal.
CALL SETPARAM (filenumber, function [, param array ]
[, param count ] [, last param array ]
[, last param count ])