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From: jimm@mitsumi.UUCP (Jim Mackraz)
Newsgroups: comp.sys.amiga
Subject: Re: StepRate ... a utility that makes your floppies FASTER!
Message-ID: <449@mitsumi.UUCP>
Date: Thu, 8-Oct-87 13:59:32 EDT
Article-I.D.: mitsumi.449
Posted: Thu Oct  8 13:59:32 1987
Date-Received: Sun, 11-Oct-87 12:58:19 EDT
References: <15607@amdahl.amdahl.com> <1282@knopfler.munsell.UUCP> <71@bacchus.DEC.COM>
Reply-To: jimm@mitsumi.UUCP (James Mackraz)
Organization: Mitsumi Technology Inc
Lines: 24
Keywords: grinding noise pitch control benchmarks sausages maybe

In article <71@bacchus.DEC.COM> alverson@decwrl.UUCP (Robert Alverson) writes:
>>One thing I did notice, there was a definite improvement in the
>>sound quality of the "grindgrindgrind" noise that my drives make
>>when I increased the stepping delay time.

>I've been waiting for this for a while, now, since I kew that the
>gind is caused by running drives at *too slow* a step rate.  In my
>humble opinion, C-A blew it here in that they had to run it slow
>to guarantee that (maybe with a 68020) the steps wouldn't go too fast.
>Bob

Indeed, the disk noise with v1.1 was caused by slower than necessary timing.
The timing on v1.2 is not slower than necessary, although it may be
no faster than permitted by any particular drive ever used in Amiga 1000s.

Turns out the Amiga has been driving floppies with a 68020 for over a
year.  I believe that such timings are not processor speed or version
dependent.  This is not one of the areas where C-A blew it.

	jimm

-- 
	Jim Mackraz
	Mitsumi Technology, Inc.		408/980-5422
	{amiga,pyramid}!mitsumi!jimm