Xref: utzoo comp.unix.sysv386:7227 comp.unix.wizards:25089 comp.unix.internals:2607 Newsgroups: comp.unix.sysv386,comp.unix.wizards,comp.unix.internals Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uupsi!ficc!peter From: peter@ficc.ferranti.com (Peter da Silva) Subject: System V, B0, and DTR. Message-ID: Summary: Aaaaaargh! Keywords: iNTeL SVID callback etc... Reply-To: peter@ficc.ferranti.com (Peter da Silva) Organization: Xenix Support, FICC Date: Tue, 23 Apr 91 21:45:30 GMT OK, I'm having a problem implementing callback on an iNTeL 520 (multibus-2 based 386/486 multi-CPU box) with System V/386. It seems that the SVID does not define what happens when you set speed to B0 (to drop DTR) and then back to another baud rate (B2400, say). I beleive that it should raise DTR again (after all, why allow the B0 hack otherwise? If you want to drop DTR altogether and never talk to the device again why not just close the port?). iNTeL says that even though it's a 2-line fix they can't do it because it's not in the SVID... even to do a workaround for us. The iNTeL technical people are quite helpful, and seem as frustrated as us. Any suggestions? (no, closing and opening the port doesn't appear to be an option in this case) What do you people think the Right Thing to do is? -- Peter da Silva. `-_-' peter@ferranti.com +1 713 274 5180. 'U` "Have you hugged your wolf today?"