Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!umcp-cs!chris From: chris@umcp-cs.UUCP (Chris Torek) Newsgroups: net.unix Subject: Re: 4.3 dropping characters ? Message-ID: <3741@umcp-cs.UUCP> Date: Wed, 8-Oct-86 01:52:29 EDT Article-I.D.: umcp-cs.3741 Posted: Wed Oct 8 01:52:29 1986 Date-Received: Wed, 8-Oct-86 20:12:33 EDT References: <323@uwmacc.UUCP> Reply-To: chris@umcp-cs.UUCP (Chris Torek) Distribution: net Organization: University of Maryland, Dept. of Computer Sci. Lines: 18 In article <323@uwmacc.UUCP> edwards@uwmacc.UUCP (mark edwards) writes: > We have emulex dmfs. It seems either the first character of a line > or the last character of a line get dropped occasionally. The Emulex DMF emulators (CS11 and CS21 series, I believe) do not exactly emulate DEC DMFs: They follow only the manuals. The 4.3BSD driver's DMA code expects the word count register to be updated by bytes, not words, and so becomes confused and drops characters. A very quick fix is to raise dmf_mindma (I think: check /sys/vaxuba/dmf.c for the exact name). If you set this beyond 60, no standard 4.3 kernel will do DMA, since 4.3's CBLOCK is set to 64. Keith Muller has better fixes. I am using an entirely different DMF driver myself. -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 1516) UUCP: seismo!umcp-cs!chris CSNet: chris@umcp-cs ARPA: chris@mimsy.umd.edu