Configuration of Device Objects for a Single Keyboard or a Single Mouse Device

The following figure shows the configuration of device objects for a Plug and Play PS/2-style keyboard and mouse device. Each class driver creates an upper-level class filter device object (filter DO) that is attached to a function device object (FDO) through an optional upper-level device filter DO. An upper-level device filter driver creates the upper-level device filter DO. I8042prt creates the function DO and attaches it to a physical device object (PDO) created by the root bus driver.

The following figure shows the configuration of device objects for a Plug and Play serial mouse. Mouclass creates an upper-level class filter DO that is attached to a function DO created by Sermouse (or a vendor replacement for Sermouse). The Sermouse DO is attached to a PDO created by Serenum.

The following figure shows the configuration of device objects for a legacy device. The class driver creates a class device object and attaches to a function device object created by the function driver.

 

 

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Build date: 4/28/2012