[Coco] OS-9 Floppies - Conversion to DSK format?
devries.bob at gmail.com
Fri Jun 1 00:42:47 EDT 2007
The Vavasour emulator will accept double sided disk images provided that:
1. The disk image is of an OS9 disk, AND
2. the disk file has the extension .OS9
This is also true of the MESS emulator, BTW.
Regards, Bob Devries, Dalby, Queensland, Australia
Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.
my blog: http://bdevries.invigorated.org/
----- Original Message -----
From: "Andrew" <keeper63 at cox.net>
To: <coco at maltedmedia.com>
Sent: Friday, June 01, 2007 2:35 PM
Subject: Re: [Coco] OS-9 Floppies - Conversion to DSK format?
> First off, I want to thank again everyone who offerred suggestions on how
> I could figure out sides/tracks for the OS-9 disks I have from Carey, that
> I am converting.
> I especially want to thank Bob Devries for posting his OS-9 Disk
> Identifier program written in DECB. Using it, I made quick work in
> identifying what was what with all of the OS-9 disks I have. The majority
> of them were 35 track/single-sided (that is, they were either actual
> single-sided 35 track floppies, or two 35 track sides on a "flippy") and
> 40 track/double-sided - essentially "standard" OS-9 floppies. I did find a
> few which weren't identifyable (one side may be DECB, or something else
> entirely, or maybe unreadable - I don't know yet), plus one really strange
> disk which identified as 80 track, 96TPI, double-sided. That one I am
> saving for last in this conversion process.
> So - now I am doing the conversion. As all of you may or may not be aware,
> I am using RETRIEVE.EXE, included with Jeff Vavasour's CoCo 3 emulator, to
> grab a DSK format image of the floppy. Herein lies my problem:
> RETRIEVE.EXE can grab an image from only one side of a floppy. For 35 and
> 40 track single-sided OS-9 floppies, this isn't a problem. In fact, the
> first disk I converted in my OS-9 batch was a 35 track single-sided floppy
> disk companion (?) for the book "The Rainbow Guide to OS-9".
> However, my second floppy is a 40 track, double-sided floppy. Now, I can
> grab one side of it, and quite possibly even grab the other side - winding
> up with one or two 181K DSK images.
> This isn't what I want, though - I want a single DSK image that contains
> all the data from both sides of the original 40 track, double-sided
> Furthermore, based on what I am reading in the documentation for Jeff's
> emulator, it seems to state that it can't handle virtual disks with two
> sides. Does anyone know if this is correct?
> I also have David Keil's CoCo 3 emulator as well - can I use it in some
> manner to create the virtual DSK image I need?
> Or - am I up a creek? I am willing to build a new CoCo emulation box using
> Linux and MESS, if that is what it would take (if there is software to
> grab the image under Linux?).
> Once again, my setup for this project is as follows:
> 1. DOS (Caldera OpenDOS) PC for emulation use (w/ 5.25
> floppy drive as A:)
> 2. Jeff Vavasour's CoCo 2 & 3 emulators under DOS
> 3. David Keil's CoCo 3 & 3 emulators under DOS
> 4. CoCo 3 w/ 512K and dual DSDD floppy drives
> 5. Mandrake 10.1 Linux box (for documentation)
> Once again, I don't have a Windows box with a 5.25 floppy drive
> installed - unless there is no other way to do what I am wanting to do, I
> would prefer to avoid building such a box.
> Thank you in advance for your suggestions - you guys have been a great
> help to me in this project so far!
> -- Andrew L. Ayers
> Glendale, Arizona
> Coco mailing list
> Coco at maltedmedia.com
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