PPI(4) BSD/hp300 Kernel Interfaces Manual PPI(4)NAMEppi — HP-IB printer/plotter interface
device ppi0 at hpib0 slave 5
The ppi interface provides a means of communication with HP-IB printers
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
device. Current versions of the autoconf code can not probe for these
devices, so the device entry in the configuration file must be fully
The device files appear as follows:
"crw-rw-rw- 1 root 11, 0 Dec 21 11:22 /dev/ppi"
This driver is very primitive, it handshakes data out byte by byte. It
should use DMA if possible.
BSD June 9, 1993 BSD