## Virtual Device Driver Reference for OS/2

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### Virtual Numeric Coprocessor Device Driver

The virtual numeric coprocessor device driver (VNPX) provides virtual coprocessor (80 x 87) support for multiple DOS sessions. The virtual numeric coprocessor device driver coordinates exception and interrupt reflection for the real coprocessor. Machines with the 80386 B1 processor, or without a coprocessor, do not have coprocessor support.