Aucbarpa.124 NET.unix-wizards utzoo!decvax!ucbvax!arpavax:wnj Thu Aug 27 18:05:44 1981 performance of async interfaces the able dmax works just fine. others are too new for final word on them, although many have had problems with early cs11s; emulex has fixed most of these problems. on vax, we see following overheads for output at 9600 baud with reasonably long lines (i.e. not all characters require special processing): dz-11 5% dh-11 3% this of a 11/780 processor. the dz-11 uses pseudo-dma. on 32/v pre pseudo-dma one 9600 baud line was > 100%, i.e. you couldn't drive one line at full 9600. bill joy ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.