Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!tut.cis.ohio-state.edu!ukma!xanth!rlb
From: rlb@cs.odu.edu (Robert L. Bailey)
Newsgroups: comp.os.cpm
Subject: Re: Kaypro DSDD 5.25" floppy parameters
Message-ID: <11425@xanth.cs.odu.edu>
Date: 15 Feb 90 03:26:03 GMT
References: <2756@lll-lcc.UUCP>
Reply-To: rlb@cs.odu.edu (Robert L. Bailey)
Organization: Old Dominion University, Norfolk Va.
Lines: 27

In article <2756@lll-lcc.UUCP> rzh@lll-lcc.UUCP (Roger Hanscom) writes:
>
>Does anybody have the vital statistics on Kaypro 5.25" DSDD
>floppies??  Things like sectors/trk, BSH, etc.  I believe they
>should be about 390K with 10, 512b sectors/track.  I'm trying
>to write a BIOS that will use the Kaypro format.  What is the
>interleave for this format??
>
Yes, the Kaypro DSDD format is as you described.  I'm not absolutely sure
about the interleave, but, here is some other info that you will need
to create the disk parameter block & header:

	PARAMETER		Hex	Decimal
	Sectors/trk		28	40
	Blk shift factor	04	 4
	Alloc Block Mask	0F	15
	Extent Mask		01	 1
	Disk Size Max	      00C2     194
	Dir Max -1	      007F     127
	Alloc Mask 0		C0     192
	Alloc Mask 1		00	 0
	Dir Check size	      0020      32
	Sys Trks Offset	      0002	 2

Hope this helps.

Bob Bailey