                          TouchBack(tm)
                               1.2

                              Notes
                        December 12, 1994

-----------------------------------------------------------------
               FILES IN THE \TCHBACK SUBDIRECTORY
-----------------------------------------------------------------

This subdirectory contains the following files:

     TCHBACK.EXE    TouchBack 1.2.
     TCBDIFF.ZIP    Contains lists of the differences between
                    this version of TouchBack and the previous
                    versions.

-----------------------------------------------------------------
                     PROGRAMMER INFORMATION
-----------------------------------------------------------------

See the DOS Programmer's Toolkit (P/N 008101-A) available
separately from Elo. The TouchUp User's Manual and the TouchBack
Programmer's Reference Manual are included in the Toolkit.

-----------------------------------------------------------------
                USING TOUCHBACK WITH MONITORMOUSE
-----------------------------------------------------------------

TouchBack and MonitorMouse for DOS (Elo's mouse emulator) should
not be active at the same time because both control ELODEV and
assume it is in a certain state.

If you wish to use both these TSR's, for best results, only have
one loaded at a time. It is sometimes possible to keep both
loaded, but programmers must be sure to use TouchBack's DISABLE
function when exiting a program using TouchBack, and do not have
any mouse calls in the same program that makes TouchBack calls.

-----------------------------------------------------------------
                     TOUCHSCREEN CALIBRATION
-----------------------------------------------------------------

TouchBack does not support "auto-calibration" by reading the
ELOGRAPH.CAL file. The calibration values TouchBack uses are
those currently set in ELODEV on entry to your application.

-----------------------------------------------------------------
                      SET BINPATH & PICPATH
-----------------------------------------------------------------

The environment variables BINPATH and PICPATH, specified with the
DOS SET command, are examined only when TouchBack is first
loaded. If these variables are changed, TouchBack must be
extracted and reloaded before the change will be recognized.
