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Newsgroups: comp.os.386bsd.development Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!elroy.jpl.nasa.gov!decwrl!rtech!amdahl!hip-hop!dfox From: dfox@hip-hop.suvl.ca.us (David Fox) Subject: Re: V86 mode References: <107725@hydra.gatech.EDU> <23tqbk$3tt@europa.eng.gtefsd.com> Organization: Hip-Hop BBS, Sunnyvale, CA (408-737-8300) Date: Sat, 7 Aug 1993 05:09:38 GMT X-Newsreader: TIN [version 1.2 PL0] Message-ID: <CBDIC3.Gp4@hip-hop.suvl.ca.us> Lines: 21 David C. Niemi (niemidc@oasis.gtefsd.com) wrote: : The V86-mode emulators I have seen tend to suck about 10% of the CPU each (on a 386). : Is this inherent in V86 mode, or is it a deficiency of the implementation? I am sure some of the performance hit you get with dosemu and v86 mode in general is because the system is already in protected mode, and there is significant anction to switch between the two modes, and linux is continually switching between the two when running dosemu. I don't think the problem is unavoidable, because in part that is how the intel hardware does things. BTW, I tried dosemu on a 386SX running linux, and the DOS programs running underneath were really too slow to use. : In other words, have you gotten around this problem? : --- : David C. Niemi: David.Niemi@oasis.gtegsc.com -- David E. Fox email: hip-hop!dfox@amdahl.com 5479 Castle Manor Drive San Jose, CA 95129 Thanks for letting me change the magnetic 408/ 253-7992 images on your hard drive.