DESCRIPTION

The INTERACTIVE UNIX Operating System can now probe PCI bus systems.  This is done at boot up time by the /etc/initprog/identify program. This program will set the PCI_BUS bit field (defined in the /sys/sysenvmt.h header file) of the "machflags" member of the global system environment "sysenvmt" structure whenever it detects a PCI bus in a system.  Driver writers who wish to test for a PCI bus machine can use the following C code to detect the PCI bus:

if (sysenvmtp->machflags & PCI_BUS){
      /* Detected PCI bus */
}

NOTE: It is the responsibility of the driver writer to parse and scan PCI configuration space for a particular PCI device. 

SEE ALSO

ncr810(7). 
 

\*U  —  Version 1.0