diag1 - diagnostic interface to the PCI I/O subsystem
diag1 is a diagnostic pseudo-driver, which provides support tools with
access to the PCI I/O subsystem. This driver is used by tools within
the Support Tools Manager (STM) to interact with PCI cards connected
to the system. Without diag1, support tools for PCI cards will not be
able to operate.
diag1 was developed by HP.
/dev/diag directory containing diagnostic device files
stm(1M) from the Support Tools Manager
Hewlett-Packard Company - 1 - HP-UX Release 11i: November 2000