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From: huang@husc4.HARVARD.EDU (Howard Huang)
Newsgroups: comp.sys.apple2
Subject: Re: Fast reading of floppies...
Message-ID: <2160@husc6.harvard.edu>
Date: 11 Mar 90 16:20:45 GMT
References: <14075@fs2.NISC.SRI.COM> <14076@fs2.NISC.SRI.COM>
Sender: news@husc6.harvard.edu
Reply-To: huang@husc4.UUCP (Howard Huang)
Organization: Harvard University Science Center   Cambridge, MA
Lines: 18

>How do those fast disk copiers work?   

If you are reading in a whole disk to copy it and care not what order
the blocks appear in (this worked in DOS 3.3 at least):

One thing that may help is to change the interleave pattern.  If you
are reading in blocks/sectors with a fast, tight assembly loop, you may
be able to change the interleave to a lower (is that the proper word?)
number.

Another thing to be sure of is that you are reading blocks in order.
Making the drive head jump from block 20 to block 600 takes time.

----------------------------------------------------------------------------
Howard C. Huang                        Internet:  huang@husc4.harvard.edu
Sophomore Computer Science Major       Bitnet:    huang@husc4.BITNET
Mather House 426, Harvard College      UUCP:      huang@husc4.UUCP (I think)
Cambridge, MA 02138                    Apple II:  ftp husc6.harvard.edu