Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uakari.primate.wisc.edu!dali.cs.montana.edu!ogicse!intelhf!agora!billsey
From: billsey@agora.uucp (Bill Seymour)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 14Mhz Comments
Message-ID: <1990Oct11.205107.28171@agora.uucp>
Date: 11 Oct 90 20:51:07 GMT
References: <1164@tau.sm.luth.se> <1990Oct9.230639.9336@actrix.co.nz>
Distribution: comp
Organization: Open Communication Forum
Lines: 35

In article <1990Oct9.230639.9336@actrix.co.nz> geoff@actrix.co.nz (Geoff McCaughan) writes:
:
:BTW when I get my machine running it goes great - very reliable and
:quite a speedup. My hard drives run fine, and two of my floppies are
:OK as well (internal 3.5" & external 5.25"), the other one is
:hopeless unless I run steprate to slow it down, this helps, but it's
:still not 100% reliable, even if I slow the steprate down to 10* the
:normal delay, so: is there more going on here than just the head
:stepping, what else are the timers screwing up?

	The big problem (and the one you can't easily fix in software)
is the settle delay after the drive motor starts. It waits 'x' length
of time after power up before allowing a read or write of the disk.
That allows the drive to come to full speed before any bits get read
or written. If you don't allow for quite enough time there, you run the
risk of writing data at the wrong rate.

:Also of interest, QuarterBack, Xcopy and MSH, all work fine on all
:my floppies, so it seems that anything that doesn't use
:trackdisk.device works.
: 
:Hope to hear from some more of you hardware hackers soon...... keep
:your iron hot!
:
:-------------------------------------------------------------------------------
:Geoff McCaughan        Email: geoff@actrix.co.nz  Phone: +64 3 539545 or 852101
:Amiga/Hardware/Unix/Quantum Mechanics Hacker      Phax : +64 3 539567
:"Anarchy: Think of it as evolution in action."            ^ NEW ZEALAND!


-- 
     -Bill Seymour                                            billsey@agora
***** American People/Link Amiga Zone Hardware Specialist  NES*BILL *****
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