PPI(4)                OpenBSD Programmer's Manual (HP300)               PPI(4)

NAME
     ppi - HP-IB printer/plotter interface

SYNOPSIS
     ppi0 at hpibbus0 slave 5 punit 0

DESCRIPTION
     The ppi interface provides a means of communication with HP-IB printers
     and plotters.

     Special files ppi0 through ppi7 are used to access the devices, with the
     digit at the end of the filename referring to the bus address of the de-
     vice.  Current versions of the autoconf code can not probe for these de-
     vices, so the device entry in the configuration file must be fully quali-
     fied.

     The device files appear as follows:

           "crw-rw-rw-  1 root      11,   0 Dec 21 11:22 /dev/ppi"

DIAGNOSTICS
     None.

SEE ALSO
     hpib(4)

BUGS
     This driver is very primitive, it handshakes data out byte by byte.  It
     should use DMA if possible.

OpenBSD 3.0                      June 9, 1993                                1
