hartley@uvm-cs.UUCP (Stephen J. Hartley) (11/09/84)
Does anybody know the answer to the following question that we have debated off and on around here. We have a VAX 750 and a 780, both running 4.2 BSD. There are only dmf32's on both of them. The dmf32 has 2 modem ports and six other ports. Our configuration is such that we turn on all flag bits (0xfc) except for the modem ports. What we are debating is whether or not the other 6 ports support DTR. In other words if we used all flags off, would UNIX log people out if they turned their terminal off without logging out. The DEC hardware manual doesn't seem to say, according to people here. Does anybody know? Thanks. -- "If that's true, then I'm the Pope!" Stephen J. Hartley USENET: decvax!dartvax!uvm-gen!uvm-cs!hartley The University of Vermont CSNET: hartley%uvm@csnet-relay (802) 656-3330
hartley@uvm-cs.UUCP (Stephen J. Hartley) (11/11/84)
Question: The dmf32 has 2 modem ports and six other ports. Our configuration is such that we turn on all flag bits (0xfc) except for the modem ports. What we are debating is whether or not the other 6 ports support DTR. In other words if we used all flags off, would UNIX log people out if they turned their terminal off without logging out. The DEC hardware manual doesn't seem to say, according to people here. Does anybody know? Thanks. Replies summarized for the net: --- Yes, it does have DTR and CXR (sometimes called RLSI). All boards (dz, dh, dmf,...) that I have used have these signals. It is the CXR that you need for the auto logout on hangup. --- The other six ports DO NOT support DTR. We have not read this anywhere, but instead have measured it with a voltmeter. --- I believe the answer is no. We have several vaxen around here with dmf32s and without the flags set, you can't log in to begin with. Because there is no DTR to detect, open hangs waiting for this non-existent line to become active (a minor flame -- if they're not going to provide a signal at all can't they at least make it appear active!). VMS also couldn't drop the line (it didn't have such trouble with flags). --- Sorry, no such luck. The DMF32 "fakes" the 6 ports without modem control. The modem status bits will be there, but never change. I think they read "DTR, RTS" --- -- "If that's true, then I'm the Pope!" Stephen J. Hartley USENET: decvax!dartvax!uvm-gen!uvm-cs!hartley The University of Vermont CSNET: hartley%uvm@csnet-relay (802) 656-3330