Using Multiple Devices

Using Multiple Devices

The ULI feature allows a program to open more than one interrupting device. You register a handler for each device. However, the program can only wait for a specific interrupt to occur; that is, the ULI_sleep() function specifies the handle of one particular ULI handler. This does not mean that the main program must sleep until that particular interrupt handler is entered, however. Any ULI handler can waken the main program, as discussed under "Interacting With the Handler".