ad(4)				  Unsupported				 ad(4)

Name
       ad - Data Translation A/D converter

Syntax
       device ad0 at uba0 csr 0170400 vector adintr

Description
       The  converter  provides the interface to the Data Translation A/D con‐
       verter.	This is not a real-time driver, but  merely  allows  the  user
       process	to  sample  the	 board's  channels  one at a time.  Each minor
       device selects a different A/D board.

       The driver communicates to a user process  by  means  of	 ioctls.   The
       AD_CHAN ioctl selects which channel of the board to read.  For example,
	    chan = 5; ioctl(fd, AD_CHAN, &chan);
       selects	channel	 5.   The  AD_READ  ioctl  actually reads the data and
       returns it to the user process.	An example is
	    ioctl(fd, AD_READ, &data);

Files
				      VAX				 ad(4)

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