Path: utzoo!attcan!uunet!ginosko!uakari.primate.wisc.edu!ames!amelia!pioneer.arc.nasa.gov!samlb From: samlb@pioneer.arc.nasa.gov (Sam Bassett RCD) Newsgroups: comp.unix.wizards Subject: Re: terminals/term. servers Message-ID: <3365@amelia.nas.nasa.gov> Date: 8 Oct 89 04:07:30 GMT References: Sender: news@amelia.nas.nasa.gov Reply-To: samlb@pioneer.arc.nasa.gov (Sam Bassett RCD) Organization: NASA Ames Research Center, Mtn Vw CA 94035 Lines: 23 In article sr16+@andrew.cmu.edu (Seth Benjamin Rothenberg) writes: >We >were told that character input from hardwired terminals (as opposed to >virtual terminals) causes cpu interrupts. Is this true? This very much depends on the design of the serial interface board in your DEC machine -- some do, and some don't. Pioneer is an ancient VAX 11/785, and we swapped out some interrupt-on-character serial boards, and speeded up the system something fierce. What you need to do is hold the DEC salesperson's feet to the fire about the serial boards -- if you have a DEC C.E. around handy, ask him/her/it which boards do & don't cause keystroke interrupts. BTW -- we have quite a few Annex boxes from Encore around here, which take up to 32 serial lines and put them on the Ethernet -- as I understand it, they cost in the high 5 to low 6 digits -- very convenient. Sam'l Bassett, Sterling Software @ NASA Ames Research Center, Moffett Field CA 94035 Work: (415) 694-4792; Home: (415) 969-2644 samlb@well.sf.ca.us samlb@ames.arc.nasa.gov := 'Sterling doesn't _have_ opinions -- much less NASA!'