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What to do when a CalComp DrawingBoard III does not work properly.
According to Calcomp, DrawingBoard III digitizers that have 3 banks of switches, should keep bank C in its default mode when in emulation mode. PC ARC/INFO and DAK require a CalComp DrawingBoard III to be set in emulation mode as CalComp 9100 or GTCO.
If you have problems during the DIGTEST or DIGTESTW, reset the digitizer so bank C switches will go back to their default values. Then, set the switches for banks A and B for the appropriate emulation mode. Retest the digitizer.
This is not universal for all Calcomp DrawingBoard III digitizers; some have been known to work correctly when bank C is set up as follows:
Bank C 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0