[Coco] OS9 Lvl 1 rev 2.00.00 - double sided floppy configuration

[Chad Hendon]

Dude!!  Replaced only the D0, D1 and CCDISK (with RB1773) and it actually formatted a DS disk!  This is promising... will let you know more as I try migrating some things
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-----Original message-----
From: Bob Devries <devries.bob at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Fri, Aug 6, 2010 09:31:22 GMT+00:00
Subject: Re: [Coco] OS9 Lvl 1 rev 2.00.00 - double sided floppy configuration

Thinking about this some more.....

Will Chad still require the BOOTFIX module, or should I send him OS9Gen and Cobbler from NitrOS9 as well?

Chad, the "fix" will be a multiple step process as I remember it....

"Convert" your present OS9Boot file to Double-sided working by replacing the CCDISK driver module and the descriptors D0 and D1 with their NitrOS9 equivalents. This will leave you with a disk which is still single sided, but when booted, will have double-sided working.

To get a bootable double sided system, you need to then format a double sided disk, and cobbler the boot file to it. Sadly, the original OS9 Level 1 Cobbler (and OS9Gen, too I think) were not coded for DS working, so they will try to put the boot track (usually on track 35) on the wrong track. You can fix this (I'm presuming here that NitrOS9 fixed this...) by replacing Cobbler and OS9Gen with modules from the NitrOs9 distribution.

If you like, I can add those to the disk image I already sent and resend.

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- From: "Chad H" <chadbh74 at hotmail.com>
To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
Sent: Friday, August 06, 2010 4:35 PM
Subject: [Coco] OS9 Lvl 1 rev 2.00.00 - double sided floppy configuration


> Ok, I'm revisiting this issue under the old OS-9 level 1 rev 2.00.00 > because
> NitrOS9, while it provides DS/DD 5.25" floppy access already, eats up too
> much memory even after I removed as many modules as I could get away with
> and still have it boot  (unless I can find a good NitrOS9 disk 2 'modules'
> that I can somehow use to strip it down even further).
>
>
>
> Right now, I can get 141 pages free using MFREE at NitrOS9 bootup.  OS9 is
> getting 162 pages.  I need the extra memory.  Anyone know a way to
> re-configure or replace the floppy driver in OS-9 level 1 rev 2.0.00 to > get
> it to Double-sided 40-track?  (Just like it is in NitrOS9)
>
>
>
> Thanks
>
>
>
> -          Chad
>
>
>
>
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