Setup 91xxx Tablet with AutoCAD 13 for DOS

A.  Set Internal Switches to GTCO settings using the 9100 series User's Manual

    1.  The 9100 series tablet must have a firmware revision "F" or later to work with all newer Wintab™ driver sets. 
         Following are instructions to assist with verifying the firmware revision and setting the internal switches.

    2.  Following are a series of steps to disassemble the 9100 tablet.

                                ***IMPORTANT***
        a.  Disconnect all cables from the tablet and remove all covers from the port access holes before trying to remove
             the board train.  (The board train is the two attached circiut boards that are to be removed.)
                                ***IMPORTANT***

        b.  If the tablet is on a table, move it until the upper left corner of the frame overhangs the table edge.  If the tablet
             is on a pedestal, tilt it to vertical.

        c.  With a Phillips screwdriver, remove the cover from the upper left corner.  This cover is held by two screws
             recessed into the underside of the cover. The board train is suspended in a slot in the upper part of the frame.

        d.  Remove the lock screw next to the POWER button.

        e.  Depress the POWER switch, grasp the ribbon cable and partially pull the board train out of the slot.  Hold the
            power switch down until it slides behind the frame.

        f.  Place a thumb on each release tab of the ribbon cable connector. Using firm pressure, push the tabs outward
            unlocking the cable from the connector.   Remove the cable from the connector.

        g.  Using the cable connector as the grip, pull the board train straight out of its slot.

            ***Hold the ribbon away from the board train to prevent it from being damaged by the rough board surface.***

        h.  The first board in the train is the Digitizing Processor Board. "Switch Bank SB1" is on this board.

        i.  The second board is the Communication Interface board.  Switch Bank's. "SW1" and "SW2" are on this board.

    3.  Checking the firmware revison.

        a.  Locate the first board, the Digitizing Processor Board.

        b.  Check the first horizontal ROM chip closest to the Communication Interface Board connector for a sticker
            indicating the part number and revision.   This chip is located in the U3 ROM socket.

        c.  If the revision is not F, G, or H; ***STOP***.  This board can not be used with newer Wintab™ driver sets. 
            Firmware upgrades are no longer available for these tablets.  Reassemble the tablet using the previous
            instructions in A.2 as a guide.

          ***Dial 1-800-CALCOMP for information on the latest CalComp tablets***

        d.  If the firmware revision is F, G, or H, proceed to the next section to set the internal switches.

     4.  Following are the internal switch settings required to enable this digitizer to operate properly.

         Digitizing Processing Board-

         SB1-  OOOCOOXX (For a 4 button cursor)

                        or
                
         SB1-  OOCOOOXX (For a 16 button cursor)

         Communication Interface Board-

         SW1-  OOCCOCCO
         SW2-  OCCOCCCC

       (O =  Switch is Open   C = Switch is Closed  XX= No Change)
   
    5.  To change the switches

        a.  Use a pen or small pointed instrument to "click" each switch.

        b.  "Click" the rocker switch to the word OPEN to set it to the OPEN position or to the # of the switch, (1-8), for
             the CLOSED position.

    6.  After the switches are set properly, reassemble the tablet using the steps from A.2 as a guide

B.   Reconfigure AutoCAD for the CalComp Driver

     1.   Start AutoCAD and type "CONFIG" at the Command Line.

     2.   Choose "Configure Digitizer".

     3.   Do you want to select a different one? [Y]

     4.   Select "CalComp Digitizer Series ADI 4.2 - by CalComp" from the AutoCAD Digitizer Configuration menu.

     5.  You will be prompted for a model: choose 9100 Series; indicate the size of your board, number of buttons on
          your cursor,  the COM in which the board is plugged. It will  ask if you wish to choose Polling or Interrupt. If you
          have a 486/66 or Pentium system, choose Polling. With the 386 it will depend on the system.  Try both polling
          and interrupt to define which works best with your system.

     6.   Type "0" to Exit

     7.   Keep configuration changes.  [Y]

     8.   Enter the drawing editor by opening or creating a drawing.

        a.  With the polling option, there could be possible crosshairs snagging or sticking  in Autocad.  This would  be a
         fraction of a second delay and happen about every 20 seconds.   Changing the Vscan  rate easily resolves this
         situation.  To make the changes you will need to be in the ACADR13\DOS  DIRECTORY and type:

            CFIG386  ACAD   -VSCAN   XXXXXX. 

            The formula to calculate the "XXXXXX" rate is as follows:

            Pentium 200:    20000   x Memory  x 11  
            Pentium 166:    20000   x Memory  x 10
            Pentium 150:   20000   x Memory  x 9
            Pentium 133:    20000   x Memory  x 8
            Pentium 120:    20000   x Memory  x 7
            Pentium 100:    20000   x Memory  x 6
            Pentium 90:     20000   x Memory  x 5
            Pentium 66:     20000   x Memory  x 4
            Pentium 60:     20000   x Memory  x 4
            486:                20000   x Memory x   3
            386:                20000   x Memory x   2