Article View: comp.arch
Article #2467Re: *big iron*
From: John Gardner
Date: Thu, 28 Sep 1989 09:17
Date: Thu, 28 Sep 1989 09:17
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> Organization: CSIRO Division of Wool Technology, Ryde, Sydney, Australia. Lines: 15 In article <22488@cup.portal.com> cliffhanger@cup.portal.com (Cliff C Heyer) writes: >Yup. That is because of intelligent channel processors that do DMA to multi-ported >memory. The same thing SCSI can do. Except with one user, we only need one channel >(or one for each file). But with UNIX we could use a few more. > One small point to add, the amiga does DMA to dual port ram. All DMA goes through a bank of ram called chip ram ( because the graphics coprocessors also use this area) while everything else is run is fast ram. This is a big help as the amiga does have a multitasking operating system ( usually single user though.) -- /*****************************************************************************/ PHONE : (02) 436 3438 ACSnet : johng@cavs.dwt.oz #include <sys/disclaimer.h>
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<1016@cavs.syd.dwt.oz>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!wugate!uunet!munnari.oz.au!csc!ccadfa!usage!basser!metro!cavs!johngReferences:
<21962@cup.portal.com> <1989Sep12.031453.22947@wolves.uucp> <22130@cup.portal.com> <1989Sep16.044013.429@wolves.uucp> <259@ssp1.idca.tds.philips.nl> <22308@cup.portal.com> <7981@cbmvax.UUCP> <11538@burdvax.PRC.Unisys.COM> <22488@cup.portal.comShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!wugate!uunet!munnari.oz.au!csc!ccadfa!usage!basser!metro!cavs!johng From: johng@cavs.syd.dwt.oz (John Gardner) Newsgroups: comp.arch Subject: Re: *big iron* Message-ID: <1016@cavs.syd.dwt.oz> Date: 28 Sep 89 09:17:23 GMT References: <21962@cup.portal.com> <1989Sep12.031453.22947@wolves.uucp> <22130@cup.portal.com> <1989Sep16.044013.429@wolves.uucp> <259@ssp1.idca.tds.philips.nl> <22308@cup.portal.com> <7981@cbmvax.UUCP> <11538@burdvax.PRC.Unisys.COM> <22488@cup.portal.com Reply-To: johng@cavs.UUCP (John Gardner) Lines: 19