[comp.sys.mac.programmer] Question about replacing a ROM-driver

Myron-Meier@cup.portal.com (05/26/88)

     I'm Trying to TEMPORARILY replace the standard serial drivers with my own
specialized drivers.  I know that I can permanently replace them with a call to
DrvrInstall with the correct refnum, but is there any STANDARD way to restore
the old drivers.  Ive thought of a way which involves saving the location of th
old drivers DCE, but I dont know if DrvrInstall disposes of the old one or not,
and I would have to manually place the old DCE back into the unit table,
something Id rather not do.  If this is the only way to do it, fine, Ill do it.
But Id appreciate any suggestions for a better way.  Also, will DrvrRemove
re-install an old ROM-based driver if its substitute is removed, or am I just
pushing my luck.

Thanx in advance,
Myron Meier
sun!portal!cup.portal.com!Myron-Meier