Article View: comp.sys.amiga.tech
Article #7611Re: asd
From: Mike (My Watch Has Windows) Meye...
Date: Thu, 20 Dec 1990 20:39
Date: Thu, 20 Dec 1990 20:39
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In article <925@boing.UUCP> dale@boing.UUCP (Dale Luck) writes: The 68020 does not have the horsepower to beat the blitter given the 16 bit bus and the memory access technology. Hmm - there could be something in the Amiga to cause this to be true, but it isn't for Suns. A cycle to the blitter is 280nsec. To do the equivalent operation in the cpu would take several instructions. The blitter can make thing the blit happen as fast as memory can deal with it. All it takes for the 68020 to do that is for all the instructions to land in cache. If the Amiga gives the blitter twice the memory bandwidth of the CPU, then the 68020 can't keep up on that hardware - it can't push things through memory fast enough. This will be different on the 3000, though. <mike --
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!sdd.hp.com!news.cs.indiana.edu!news.nd.edu!mentor.cc.purdue.edu!purdue!haven!decuac!pa.dec.com!bacchus!mwm From: mwm@raven.relay.pa.dec.com (Mike (My Watch Has Windows) Meyer) Newsgroups: comp.sys.amiga.tech Subject: Re: asd Message-ID: <MWM.90Dec20153932@raven.relay.pa.dec.com> Date: 20 Dec 90 20:39:32 GMT References: <925@boing.UUCP> Sender: news@pa.dec.com (News) Organization: Missionaria Phonibalonica Lines: 19