## Virtual Device Driver Reference for OS/2

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### Virtual BIOS Device Driver

The virtual BIOS device driver (VBIOS) contains the mechanism to initialize the Interrupt Vector table, BIOS data area, extended BIOS data area (on a PS/2* personal computer adapter ROM area), and the system ROM. It also provides virtual access to Programmable Option Select (POS) registers (on a PS/2 personal computer) and supports some of the DOS settings.