NAME
ppi —
HP-IB printer/plotter
interface
SYNOPSIS
ppi0 at hpibbus0 slave 5
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 device. Current versions of the autoconf code can not probe
for these devices, so the device entry in the configuration file must be fully
qualified.
The device files appear as follows:
"crw-rw-rw- 1 root 11, 0 Dec 21 11:22 /dev/ppi"
DIAGNOSTICS
None.
SEE ALSO
hp300/hpib(4)
BUGS
This driver is very primitive, it handshakes data out byte by byte. It should
use DMA if possible.