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<HTML>
<HEAD>
<TITLE>GRDRIV</TITLE>
</HEAD>
<BODY>
<H2>Grinnell Image Display (obsolete)</H2>
<DL>
<DT>Supported device
<DD>Grinnell GMR-270 Image Display System.
<DT>Device type code
<DD><CODE>/GRINNELL</CODE>.
<DT>Default device name
<DD><CODE>TV_DEVICE</CODE> (a logical name, usually
defined by the system manager).
<DT>Default view surface dimensions
<DD>Depends on monitor.
<DT>Resolution
<DD>The full view surface is 512 x 512 pixels.
<DT>Color capability
<DD>Color indices 0--255 are supported. The
representation of all color indices can be changed.
<DT>Input capability
<DD>The graphics cursor is a white cross-hair. The
user positions the cursor using the arrow keys and PF1--PF4 keys on
his terminal keyboard (<CODE>SYS$COMMAND</CODE>). The arrow keys move the cursor in
the appropriate direction; the size of the step for each keystroke is
controlled by the PF1--PF4 keys: PF1 = 1 pixel, PF2 = 4 pixels,
PF3 = 16 pixels, PF4 = 64 pixels. The user indicates that the
cursor has been positioned by typing any character other than an
arrow or PF1--PF4 key [control characters, e.g., ctrl-C, and other
special characters should be avoided, as they may be intercepted by
the operating system].
<DT>File format
<DD>It is not possible to send Grinnell plots to a
disk file.
<DT>Obtaining hardcopy
<DD>Not possible.
<DT>Author
<DD>T. J. Pearson, 1989.
</DL>
<HR>
</BODY>
</HTML>
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