Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!wuarchive!texbell!texsun!newstop!sun!kilowatt!raz
From: raz%kilowatt@Sun.COM (Steve -Raz- Berry)
Newsgroups: comp.sys.amiga
Subject: Re: Speed
Summary: Huh?
Message-ID: <127695@sun.Eng.Sun.COM>
Date: 10 Nov 89 01:00:58 GMT
References: <649@milton.acs.washington.edu> <7395@sdcsvax.UCSD.Edu>
Sender: news@sun.Eng.Sun.COM
Reply-To: raz@sun.UUCP (Steve -Raz- Berry)
Organization: Sun Microsystems, Mountain View
Lines: 27

In article <7395@sdcsvax.UCSD.Edu> kim@beowulf.UCSD.EDU (Geoffrey K Kim) writes:
>I kinda had a related query regarding the '020 and '030 CPU cards:  Isn't
>the Amiga's bus still only 16 bits wide?  Since all video data has to be
>sent over this, doesn't this present a bottleneck?  

Huh? This is incorrect. Have you forgotten about the custom graphics
chips? Denise would be very offended if she heard you say this. Video
data is kept in CHIP ram. The custom chips are told where the start of
the display is kept in memory and they do all the display fetching and
display operations (not to mention the other tasks they perform). The
CPU only has to diddle with some registers (mostly). You are right about
16bits being a bottle neck, just not for the reason you mentioned. Dave
Haynie just posted an description on why this is so.

>(I'd really like an
>A2000 with the next '030 board from CBM, but this question has kinda been 
>lurking in the background.)

I hate when that happens. ;-)

>| kim @beowulf.UCSD.EDU (Home of the Garden Weasles)                  |


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