Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!wuarchive!zaphod.mps.ohio-state.edu!mips!prls!pyramid!cbmvax!cbmehq!cbmswi!dynam!jmpor From: jmpor@dynam.UUCP (J-M Porchet) Newsgroups: comp.sys.amiga.hardware Subject: Re: GVP Trade-in Message-ID: Date: 31 Aug 90 02:45:31 GMT References: <589@oregon.oacis.org> <38CP09P@dri.com> <02048.002057@thiger.UUCP> <83242@tut.cis.ohio-state.edu> <1143@mpirbn.mpifr-bonn.mpg.de> <03283.AA03283@babylon.UUCP> <02109.124951@thiger.UUCP> Lines: 92 >In article <02109.124951@thiger.UUCP> skraw@thiger.UUCP (Stephan von Krawczynski) writes: >>In article <03283.AA03283@babylon.UUCP> rbabel@babylon.UUCP (Ralph Babel) writes: >>In article <02048.002057@thiger.UUCP> skraw@thiger.UUCP >>(Stephan von Krawczynski) writes: >> >>> 1. GVP does not DMA to amiga-memory. >> >>Not true, GVP does full DMA! > >which gvp? do you know what brings me down? i did try to get a >new gvp-controller. in fact i did only reach a production-date of >may 1990. and this controller had HEAVY problems with sony-opticals >(in fact we couldn't get them working though we tried hard). > >>This guy doesn't know what he's talking about - a very bad >>habit when you're talking about a competitor's product. See >>my earlier articles for details. > >possibly i didn't get them (would you mail them to me?) > >>> 2. why is DMA so important for you? it is generally slower >>> than the processor-method (lets call it this way). >> >>Careful ... > >as long as i don't see any controller being faster than ALF3 ... > That's not true, for examples the KRONOS controller with a good HD (siemens megafile 300 MB )can sustain a transfer of over 1 MBYTE/s and it is even more faster with a 020 or 030. personally, I use the kronos with two seagate 157N and with a 50 MHZ 030 from GVP and the controller sustain a rate of 800 KB/S (not very much but the 157N is very very slow). >>"PROCESSOR's running into heavy troubles"? Freudian slip? > >see other posting. in fact, we both know that the processor >cannot run into problems having about half of the DMA-cycles >(to chipmem) available in the system. > >>DMA to real Fast-RAM should not be affected by the DMA-load >>on Chip-RAM. And if Zorro-II DMA cannot get to the Chip-RAM, >>then the processor probably cannot either. > >probably - you say it. >btw, if you dma to fast-mem, is the processor able to access >it at the same time? (i don't know this, please answer) > >>>> The new hardcard board with space >>>> for 1 MEG SIMMS looks like a great idea. >>> >>> this is the absolut last idea one could have, because if >>> you upgrade your amiga with a 020/030/0x0-board (having >>> 32-bit mem) you have some slow memory hanging around and >>> will never get rid of it. >> >>I think there are quite a few Amiga users around who are >>happy with a 68000-based Amiga, a hard disk, and RAM. > >quite a few amiga users will be able to buy a 020-card in >the future (they're getting cheaper and cheaper). > >>I won't comment on the other stuff. david r watters and >>Michael van Elst did a perfect job on that. Thanks guys! > >sorry guys, my newsfeed broke down for 3 days, i didn't >get them. are you able to mail the articles to me? > >>Ralph > >-- >best regards, >stephan von krawczynski > >UUCP : ...!cbmvax!cbmehq!cbmger!danube!thiger!skraw >PHONE: +49 9938 1664 >FAX : +49 9938 1598 -- best regards, ------------------------------------------------------------------------------ Jean-Marc PORCHET 301, Mandement street Organisation : DYNAMIC COMPUTER (ECC 005) CH-1281 Russin SWITZERLAND UUCP: cbmswi!dynam!jmpor ------------------------------------------------------------------------------