[Coco] 256k upgrade
devries.bob at gmail.com
Wed Feb 3 03:50:59 EST 2010
Wasn't there a series of articles in one of the Coco magazines regarding the
I know I had a long case Coco2 upgraded that way. I do not now remember the
details, but I do know that I created a special OS9 Level 1 boot disk, and
that it was able to use a large-ish Ram Disk.
Regards, Bob Devries
Soldier's Hills 2
Las Pinas City
Besides a mathematical inclination, an exceptionally good mastery of one's
native tongue is the most vital asset of a competent programmer.
Edsger W.Dijkstra, 18 June 1975
----- Original Message -----
From: "Bruce W. Calkins" <brucewcalkins at charter.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, February 03, 2010 12:44 PM
Subject: Re: [Coco] 256k upgrade
> ----- Original Message -----
> From: "Robert Gault"
>>> One Caveat; they provided support for OS-9 Level 1, but no one has yet
>>> figured out what needs correcting for NitrOS9 Level One. Quite simply,
>>> NitrOS9 will not boot.
>> This is new to me. Are you saying that with this specific 256 upgrade,
>> NitrOS-9 Level I won't boot or that there is a more general problem with
>> NitrOS-9 LI?
> OS-9 needed a modification to run on the 256k equipped CoCo. The disk had
> a Basic script that modified a sector or two on an unmodified copy of the
> boot disk after verifying that it was a unmodified boot disk. You could
> then use the modified disk to create any further boot disks. So far,
> nobody has identified just what modifications were made to what modules.
> NitrOS9 will probably need similar modifications made to run on the 256k
> banker modified CoCo.
> Bruce W.
> Coco mailing list
> Coco at maltedmedia.com
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