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<H2><A NAME="SECTION001012000000000000000">&#160;</A><A NAME="8109">&#160;</A>
 <A NAME="graphic-devices">&#160;</A>
<BR>
Graphic Devices
</H2>
  The characteristics of graphic devices differ from device to device.
  Therefore, in order to obtain a useful plot, the characteristics of
  the graphics device in use have to be known in advance.
  MIDAS can run on various combinations of alpha-numerical terminals, 
  image display systems and graphic devices. How to specify the 
  graphic output device for these possibilities is described below.

<P>
If you are using the standard MIDAS configuration (alpha-numerical
  and graphic terminal together with an image display), the MIDAS
  start-up procedure MIDAS takes care of the proper assignment. If
  you want to obtain graphic output on a workstation running under
  X-Windows you have to issue the command <TT>  CREATE/GRAPHIC</TT><A NAME="8112">&#160;</A>. This
  command creates a window on the workstation where subsequent plot
  and overplot commands will write. Up to 4 graphic windows can be
  created this way. Removal of a window can be done with <TT>  DELETE/GRAPHIC</TT><A NAME="8114">&#160;</A>.

<P>
To get plot output on a graphics device (the graphic terminal included), 
  a proper assignment for that device has to be done in advance. Obviously, 
  the assignment depends on the type of device in use and hence may differ 
  from system to system. If your institute mainly uses graphic terminals 
  of brand ``abc'', life would be much simpler if this device were the 
  default one and therefore the assignment to be included in the MIDAS 
  startup procedure. You can ask your local MIDAS support to do so.
  The assignment to be made is:
  <UL>
<LI>for VAX/VMS systems: <TT>ASSIGN</TT> <I>AGL_type</I> <TT>AGL3DEV</TT>;
   <A NAME="8119">&#160;</A>
<LI>for UNIX systems (C-Shell): <TT>setenv</TT> <TT>AGL3DEV</TT> 
         <I>AGL_type</I>;
<LI>for UNIX systems (Bourne-Shell): <TT>AGL3DEV</TT>=<I>AGL_type</I>.
  </UL>  Changing the assignment from the default device to another one can always 
  been done in the <TT>login.prg</TT><A NAME="8127">&#160;</A> file 
  (see Chapter&nbsp;<A HREF="node22.html#monitor-and-syntax">3</A>). 
  This of course would be useful if a particular device is not assigned
  by the MIDAS startup procedure but is used regularly. Finally, if you 
  run MIDAS from a stand-alone (non-graphic) terminal, an assignment to the 
  NULL device <A NAME="8129">&#160;</A> or to the postscript device can be made. 
  In the first case only a graphic meta file will be created; in the later 
  case a postscript file. In case of problems consult your local MIDAS 
  support or your system manager.

<P>
Table&nbsp;<A HREF="node86.html#supported-devices">6.1</A> contains the most commonly used graphics 
  devices (the <I>AGL_type</I>'s) currently supported by MIDAS.
  <BR>
<DIV ALIGN="CENTER"><A NAME="8310">&#160;</A>
<TABLE>
<CAPTION><STRONG>Table 6.1:</STRONG>
Supported Devices</CAPTION>
<TR><TD>
   <DIV ALIGN="CENTER">
<TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="LEFT"><B> Device Identification</B></TD>
<TH ALIGN="LEFT"><B>AGL_type </B></TH>
</TR>
<TR><TD ALIGN="LEFT">DEC VT125 terminal</TD>
<TD ALIGN="LEFT">vt125</TD>
</TR>
<TR><TD ALIGN="LEFT">DEC VT240 terminal</TD>
<TD ALIGN="LEFT">vt125</TD>
</TR>
<TR><TD ALIGN="LEFT">DEC VT125 terminal with Retrogr.</TD>
<TD ALIGN="LEFT">tkg.vt640</TD>
</TR>
<TR><TD ALIGN="LEFT">DEC VT100 terminal with Retrogr.</TD>
<TD ALIGN="LEFT">tkg.vt640</TD>
</TR>
<TR><TD ALIGN="LEFT">CIT101 with CIG 201 card</TD>
<TD ALIGN="LEFT">tkg.cit101</TD>
</TR>
<TR><TD ALIGN="LEFT">GraphOn GO-250</TD>
<TD ALIGN="LEFT">tkg.vt640</TD>
</TR>
<TR><TD ALIGN="LEFT">HDS 2200</TD>
<TD ALIGN="LEFT">tkg.hds22</TD>
</TR>
<TR><TD ALIGN="LEFT">HPGL plotters</TD>
<TD ALIGN="LEFT">hpgl</TD>
</TR>
<TR><TD ALIGN="LEFT">LN03 plus laser printer</TD>
<TD ALIGN="LEFT">tkg.ln03</TD>
</TR>
<TR><TD ALIGN="LEFT">Tektronix 4010</TD>
<TD ALIGN="LEFT">tkg.t4010</TD>
</TR>
<TR><TD ALIGN="LEFT">Tektronix 4014</TD>
<TD ALIGN="LEFT">tkg.t4014</TD>
</TR>
<TR><TD ALIGN="LEFT">Tektronix 4100 series</TD>
<TD ALIGN="LEFT">tkg.t4100</TD>
</TR>
<TR><TD ALIGN="LEFT">QMS laser printer</TD>
<TD ALIGN="LEFT">tkg.qms</TD>
</TR>
<TR><TD ALIGN="LEFT">X-Windows</TD>
<TD ALIGN="LEFT">idi</TD>
</TR>
<TR><TD ALIGN="LEFT">Apple Laser Writer</TD>
<TD ALIGN="LEFT">pscript</TD>
</TR>
<TR><TD ALIGN="LEFT">Postscript printers</TD>
<TD ALIGN="LEFT">pscript</TD>
</TR>
<TR><TD ALIGN="LEFT">Postscript file</TD>
<TD ALIGN="LEFT">pscript</TD>
</TR>
<TR><TD ALIGN="LEFT">Versatec V-80</TD>
<TD ALIGN="LEFT">raster</TD>
</TR>
<TR><TD ALIGN="LEFT">Raster devices</TD>
<TD ALIGN="LEFT">raster</TD>
</TR>
<TR><TD ALIGN="LEFT">Null device</TD>
<TD ALIGN="LEFT">null</TD>
</TR>
</TABLE></DIV>   
   <A NAME="supported-devices">&#160;</A>  </TD></TR>
</TABLE>
</DIV>
<BR>

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<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-09</I>
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