MMTIMER_IOCTL_BASE

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#define MMTIMER_GETOFFSET _IO(MMTIMER_IOCTL_BASE, 0)

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#define MMTIMER_GETRES _IOR(MMTIMER_IOCTL_BASE, 1, unsigned long)

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#define MMTIMER_GETFREQ _IOR(MMTIMER_IOCTL_BASE, 2, unsigned long)

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#define MMTIMER_GETBITS _IO(MMTIMER_IOCTL_BASE, 4)

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#define MMTIMER_MMAPAVAIL _IO(MMTIMER_IOCTL_BASE, 6)

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#define MMTIMER_GETCOUNTER _IOR(MMTIMER_IOCTL_BASE, 9, unsigned long)