Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!tektronix!reed!kamath
From: kamath@reed.UUCP (Sean Kamath)
Newsgroups: comp.sys.apple
Subject: Re: ZIP Chip Question
Message-ID: <7676@reed.UUCP>
Date: Mon, 9-Nov-87 03:46:59 EST
Article-I.D.: reed.7676
Posted: Mon Nov  9 03:46:59 1987
Date-Received: Wed, 11-Nov-87 21:44:26 EST
References: <47.002420@adam.DG.COM>
Reply-To: kamath@reed.UUCP (Sean Kamath)
Organization: Reed College, Portland OR
Lines: 27

In article <47.002420@adam.DG.COM> Bruce_Kahn%MAYTAG.CEO.DG.COM@adam.dg.COM writes:
>
>  It appears to me that the Zip chip will be great if you do lots of 
>processor intensive work (ie graphics) but not that great if you do 
>I/O intensive (ie a BBS).  The 4MHz clock is strictly internal to the 
>chip so that all other mother board and cards are not affected, or so 
>it sounds.  Am I correct in my assumptions?
> 
>                 Bruce Kahn


According to the tech conference that was held on the Zip CHip in San
Francisco, the chip will now let you read from a Sider at the Sider's
speed.  Apperently the Sider has to wait for the // to fetch the data.  I do
know that the Sider (10 & 20 meg) use a pre SCSI called SASI (for Shugart
Associates Serial Interface...SCSI was developed by Shugart) and is one of
the reason's why Siders are fast.  In anycase, I asuume (probably
incorrectly) that this also applies to SCSI drives. . . (if they aren't DMA)
Which means a BBS should speed up.  (You are running a hard drive, *aren't*
you?)

Sean Kamath
-- 
UUCP:  {decvax allegra ucbcad ucbvax hplabs ihnp4}!tektronix!reed!kamath
CSNET: reed!kamath@Tektronix.CSNET  ||  BITNET:  reed!kamath@Berkeley.BITNET
ARPA:  tektronix!reed!kamath@Berkeley <or> reed!kamath@hplabs
US Snail: 3934 SE Boise, Portland, OR  97202 (I hate 4 line .siut-sB