2 Retro_Graphics
!
! This help item came from [SUNY.UTILITY]DQ650.HLP - Please edit that
! file and re-insert it into the master help file.
!
 DQ650 is a program designed to allow users to use some of the special
 features of VT100 terminals equipped with one of Digital Engineering's
 graphics cards (Retrographics Model DQ650M or DQ650S).
 
3 Options
!
 Presently the program's only function is to copy the entire graphics 
 image from the terminal back into the computer and store it as a hex
 file capable of being printed on the QMS Lasergrafix 1200. Since this
 is the only option, the program has no command syntax and is called
 up simply by saying $ DQ650.  You can call it from within a SPEAKEASY
 session by saying :_ DOVMS("DQ650").

 As the program acquires additional features it will be provided with 
 a command structure complete with input/output parameters and qualifiers. 

 Tell us what additional features you would like to see.
3 Screen_Copy
!
 The program copies the entire graphics bitmap stored in the terminal
 back into the computer and into a file named QMS.PLT in your current
 directory.  This file may then be printed on the QMS Lasergrafix 1200.

 This feature is useful for obtaining quality hardcopy (though only at
 the basic resolution of the graphics terminal) of graphs produced by
 programs (like SPEAKEASY) that do not support graphics output directly
 to the laser printer.

 To get a Screen_Copy from within SPEAKEASY say: DOVMS("DQ650").

 See "Initialization" for information on putting the terminal into 
 the proper graphics mode before attempting a Screen_Copy.
3 Initialization
!
 The terminal can be in any mode (VT100, TEK4010 or TEK4027) when the 
 program starts but must previously have had TEK4027 mode enabled with
 the largest graphics workspace. This special initialization is necessary
 because the only way to read the screen back is by using TEK4027 mode. 

 The easiest way to initialize the terminal is to enter TEK4027 mode 
 manually (using CTRL-B) and then typing the following 4027 commands:

          !WOR 33!GRA 1,33           <--- Establish Workspace.
          !SHR Y                     <--- Use 4010 Scaling.
   or
          !TEST            <--- Which has the same side effects as above.

 Then return to the graphics mode you normally use.  
 You need do this only once before you start plotting!

 At present, the program does not save and restore the previous 
 mode of the terminal; it will always leave the terminal in TEK4010
 mode with TEK4010 coordinate scaling.  This is the most convenient
 mode for SPEAKEASY users.
