## Physical Device Driver Reference

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### ASYNC_EXTGETBAUDRATE (63h) - Extended Query Bit Rate

Category:
IOCTL_ASYNC (01h)
Function:
ASYNC_EXTGETBAUDRATE (63h)
Description:
Extended Query Bit Rate

Select an item:

    Description
    Parameter Packet Format
    Data Packet Format
    Returns
    Remarks

This function returns the extended query bit rate in doublewords for a bit rate higher than 19200 bps.