AD(4) AD(4) NAME ad - Data Translation A/D converter SYNOPSIS device ad0 at uba0 csr 0170400 vector adintr DESCRIPTION Ad provides the interface to the Data Translation A/D converter. 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 dif‐ ferent 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 /dev/ad DIAGNOSTICS None. 4.2 Berkeley Distribution May 15, 1985 AD(4)