A 72 column Anelex printer and control are available as an option for
PDP-3. The control contains a one line buffer. This buffer is cleared by
the completion of an order to space the paper one position (psp). The
buffer is filled from the In-Out Register by a succession of 12 load
buffer orders (plb). The first plb will put the six characters
represented by C(IO) in the leading (left-hand) column positions of the
buffer. After the buffer is loaded, the order, print (pnt), is given.