Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!dali.cs.montana.edu!uakari.primate.wisc.edu!sdd.hp.com!wuarchive!udel!sbcs!umcvmb!c506634 From: c506634@umcvmb.missouri.edu (Eric Edwards) Newsgroups: comp.sys.amiga.hardware Subject: Re: GVP series II controller non-DMA? Message-ID: Date: 9 May 91 05:37:42 GMT Sender: usenet@sbcs.sunysb.edu (Usenet poster) Followup-To: comp.sys.amiga.hardware Organization: Hackers without Hard Drives Lines: 26 In article <07691.AA07691@babylon.rmt.sub.org> rbabel@babylon.rmt.sub.org (Ralph Babel) writes: > > In article , > c506634@umcvmb.missouri.edu (Eric Edwards) writes: > > > Now, does anyone know if the claimed "dual ported" ram on > > the Series II 0/8 is also a deception? I didn't know that > > made dual-ported simms..... > > "dual port" probably refers to the direct link between SCSI > and on-board RAM. This way, DMA to on-board RAM doesn't have > to go through the Zorro bus, i.e. no bus arbitration is > required and the Zorro bus remains available for other bus > masters. Well, that's one way to define "dual ported" ram but it's not the normal definition. It is correct but deceiving, just last the Impact series was technically DMA since they did directly access memory. But this memory was confined to a buffer space on the adapter board. The direct link between the controler and onboard ram is a good feature. Why muddy it with bogus claims of dual-ported ram? Eric Edwards: c506634 @ "I say we take off and nuke the entire site Inet: umcvmb.missouri.edu from orbit. It's the only way to be sure." Bitnet: umcvmb.bitnet -- Sigourney Weaver, _Aliens_