Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!nosc!ucsd!sdcc6!sdcc12!mp1 From: mp1@sdcc12.ucsd.EDU (Leroy Dorman) Newsgroups: comp.unix.microport Subject: Re: ad-hominem attacks go to hell Summary: stupid hardware, stupid software Keywords: uport SV/286 Message-ID: <1031@sdcc12.ucsd.EDU> Date: 12 Aug 88 01:47:05 GMT Article-I.D.: sdcc12.1031 References: <531@micropen> Organization: University of California, San Diego Lines: 41 In article <531@micropen>, dave@micropen (David F. Carlson) writes: > > There is no doubt that the Intel 80286 processor in the IBM PC/AT environment > is a son-of-a-gun to support. The operative word is 'IBM PC/AT environment'. I've run 80286's on Multibus I (THE porting base for V/286) with few problems. > small 64K kernel stack and a very expensive context switching mechanism > makes for real headaches in the serial device drivers. I have looked at > the serial device driver code and have wrung my hands at the double panics > but it is a rock and a hard place situation--no one wins. At 9600 baud > you will have an interrupt every millisecond. The service routine for pushing I've eaten 19200Kb sustained rate (no handshaking!!) into an Intel smart serial board to Unix V/286 (using a general purpose terminal driver) and didn't lose a character. I only had 1Mb or ram and 1K kernel stack. Smart hardware wins again. > David F. Carlson, Micropen, Inc. > micropen!dave@ee.rochester.edu Regardless, John, I suspect, will do a kick-a** job just as he always has. No one has a right to fault him for things not under his control. As far as V/AT goes, running it on an AT is probably more trouble than it's worth. I've been running V/286 from the release tape on Multibus I with MUCH more stability that an AT. Don't know why . . . (actually, I do. Stupid H/W vs. Smart H/W) Eric Dorman Inch by painful inch University of California, San Diego toward a better tomorrow Scripps Institution of Oceanography -Me siolmd!eric@sdsioa.ucsd.edu mp1@sdcc12.ucsd.edu Attn: eric dorman@mplvax.nosc.mil Attn: eric Disclaimer: Just because I think this way doesn't mean anyone else does.