SUMMARY
The QB.EXE and QBX.EXE environments echo to the screen the string
stored in the environment variable NO87. This is to notify you whether
or not the math coprocessor (if one exists) will be used by these
environments in floating-point calculations. NO87 must be set to null
if the coprocessor is to be used; any other string value prevents
QuickBasic or Basic Professional Development System (PDS) from using
the coprocessor. To set the NO87 environment variable, execute the
following statement from the MS-DOS command prompt:
set NO87=[string-expression]
Note: Enter <string-expression> only if the coprocessor is not to be
used.
This information applies to Microsoft QuickBasic versions 4.0, 4.0b,
4.5 for MS-DOS, to Microsoft Basic Compiler versions 6.0 and 6.0b for
MS-DOS, and to Microsoft Basic PDS versions 7.0 and 7.1 for MS-DOS.
Furthermore, .EXE files compiled in all Microsoft languages that use
an IEEE emulation math package (Basic, C, Pascal, FORTRAN) will
exhibit the same behavior when run.
For example, enter the following at the MS-DOS command prompt:
Then run QB.EXE (or QBX.EXE). The word "OFF" will be displayed on the
next line.