rusty (04/16/83)
this is pretty obscure but it might be useful to know. there is an undocumented system call resuba() that does a unibus reset. the code is in sys/vmsys.c. the argument it is passing to ubareset() is the number of the unibus (adapter) to reset. it needs to do a check to see if that number is less than ``numuba'' before calling ubareset. it is also useful to have a user level program that uses the resuba system call, several times i have unwedged devices with it thus avoiding rebooting the system.