## Input/Output Device Driver Reference

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### Keyboard Inter-Device-Driver Communication Interfaces

This chapter describes the inter-device-driver communication (IDC) interfaces for the IBM keyboard device drivers provided by the OS/2 operating system - both device-independent to device-dependent and device- dependent to device-independent.

The division of the keyboard device driver has allowed new functions to be included that were not previously available. These functions are found in the following IDC functions.

Note: If an independent-device driver changes the state of one of the drivers by making an IDC call, it is not always reflected in the other driver. For example, if a driver changes the state of the LEDs in the device-dependent (DD) driver, the change will not be reflected in the device-independent (DI) driver and the device-independent driver might change the LEDs to another state at any time.