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The NO87 environment variable is checked by the Watcom run-time math
libraries that include floating-point emulation support.  Normally, these
libraries will detect the presence of a numeric data processor (80x87) and
use it.  If you have a numeric data processor in your system but you wish to
test a version of your application that will use floating-point emulation,
you can define the NO87 environment variable.  Using the "SET" command,
define the environment variable as follows:


     SET NO87=1

Now, when you run your application, the 80x87 will be ignored.  To undefine
the environment variable, enter the command:


     SET NO87=