Mouse And Digitizer Operation - Data General Dasher D461 User Manual

• HOLD - When the terminal is turned on, the HOLD lamp is off
and the screen image is free to change. Pressing HOLD turns on the
lamp and freezes the screen image, preventing it from changing.
Keyboard operation may continue while the hold is in effect, but the
characters typed will not be displayed. Pressing HOLD again
unfreezes the screen, turns off the lamp, and causes any characters
entered during the hold period to be displayed.
Mouse and Digitizer Operation
The D461 terminal (but not the D411) can use a mouse (Data General
Model 4436) or digitizer (Data General Model 4437) to control the
graphics cursor. Either of these optional devices may be attached to the
printer/mouse/digitizer connector on the back of the terminal.
Once the mouse or digitizer is properly attached to the terminal, you
must execute the Cursor On and Cursor Track commands to control
the graphics cursor. (These are described in the DASHER D41l/D461
Programmer's Reference Manual.) After the graphics cursor is on and
tracking the device, you can move the device and the graphics cursor
will move in a corresponding manner.
The mouse and digitizer each have three buttons. The buttons on the
left and the right are user-function keys similar to the 15 function keys
at the top of the terminal keyboard. When the terminal is on-line, these
keys send a code sequence to the host. When off-line, these keys have
no effect.
The middle button on both devices is a point key. When on-line,
pressing this button will cause the terminal to send the location of the
graphics cursor to the host computer. The format of this information is
the same as that generated when the host computer issues the. Read
Graphics Cursor command. If the terminal is ofT-line, pressing this
center button causes the location of the graphics cursor to be displayed
on the screen.
The graphics cursor can also be controlled by the cursor-positioning
keys on the terminal keyboard if the appropriate Cursor Track
command is executed. The function of the middle button on the mouse
or digitizer can be duplicated by pressing the CURSR TYPE key while
holding down the CMD key. The codes sent by the other two buttons
on the mouse and digitizer cannot be generated from the keyboard.
Operation
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