Aucbvax.2267 fa.unix-wizards utzoo!duke!decvax!ucbvax!woods@LL-ASG Mon Jul 13 12:05:17 1981 UNIBUS mapalloc From: woods at LL-ASG (John Woods) I now have completed the UNIBUS map which I was working on (and announced a trial version of). Mapalloc now hands the unibus out in 8K chunks (one map register at a time), and though I haven't been able to run any conclusive benchmarks, it seems to provide some improvement. There have been some problems with asking RL02 drives to share the UNIBUS; their marginal design causes them to fail in the presence of any contention for the attention of the UNIBUS. Devices with reasonable buffering and/or no time constraints should experience no problems at all. Happy Hacking! -- John Woods ----- ----------------------------------------------------------------- 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.