The files in this directory comprise the GPIB driver and utility
routines for UNIX 4.2 BSD.  The driver will support up to 4
National Instruments GPIB11v2 cards.  The Unix kernal must be
configured to support 4 seperate interrupt vectors, one for each card.
The Kernal must pass the number of the interrupting card to the ibintr routine.

The base address  for the first bus is 0x3FEFC8, and the other three busses 
follow consectutively.

The interrupt vector for the first bus is 0270 (octal), but this is fairly
arbitrary, since 4.2 allows auto configuration.

The unix kernal source files (conf.c, etc.) must be modified to include
the new driver (ib.c).

To select which bus (card) to use, the global variable "char *dev_file" is 
used in ibudp.c (subroutine 'gpib'). The Default is "/dev/ib0", but the user
can set it to any other desired name.


			Paul Summers
			Watkins Johnson Co.
			8/15/84
