Beginning with the Solaris 7 operating environment, the use of hardware configuration files to provide arguments to probe(9E) on x86 platforms is highly discouraged, since probes can lead to system hangs and resets. Exact device configuration information is maintained by the booting system and is passed to the probe(9E) function.
A separate realmode driver may need to be developed for the booting system. See the Realmode Drivers white paper in the Driver Development Site at http://www.sun.com/developers/driver for information on realmode drivers. Hardware configuration files may be needed on some occasions to augment the information provided by the booting system. See driver.conf(4) and isa(4) for further details.