Article View: comp.periphs
Article #1620Re: Making a Mac talk SCSI to a Sun
From: fjo
Date: Mon, 16 Feb 1987 15:45
Date: Mon, 16 Feb 1987 15:45
12 lines
1199 bytes
1199 bytes
In article <540211194.20192@minster.UUCP>, martin@minster.UUCP writes: > > PS > The review of the Mac+ in November '86 Byte states that the > throughput of the SCSI interface is 320K bytes per second; does anyone > know if it is really this slow? SCSI is rated at 10M Bits (= 1.25 M Bytes) > per second, where is the factor of (almost) four going? The SCSI speed limit on the Mac+ is due to the fact that there is no DMA used for SCSI data transfer. All data transfer (in good Apple "squeeze every drop of power from the CPU" tradition) is done directly by the 68000. Perhaps this will change on the MacII?
Technical Details
Message-ID:
<186@ttrde.ATT.COM>Path:
arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!lll-lcc!ptsfa!ihnp4!cuae2!ltuxa!ttrdc!ttrde!fjoReferences:
<2594@phri.UUCP> <1784@hoptoad.uucp> <540211194.20192@minster.UUCP>Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!lll-lcc!ptsfa!ihnp4!cuae2!ltuxa!ttrdc!ttrde!fjo From: fjo@ttrde.UUCP Newsgroups: comp.periphs,comp.sys.mac Subject: Re: Making a Mac talk SCSI to a Sun Message-ID: <186@ttrde.ATT.COM> Date: Mon, 16-Feb-87 10:45:43 EST Article-I.D.: ttrde.186 Posted: Mon Feb 16 10:45:43 1987 Date-Received: Tue, 17-Feb-87 18:49:28 EST References: <2594@phri.UUCP> <1784@hoptoad.uucp> <540211194.20192@minster.UUCP> Organization: AT&T, Skokie, IL Lines: 13 Summary: Mac+ SCSI speed limit