[Coco] Nitros9 on a CC3 512k

[Bob Devries]

George,

Gene was referring to offset $10 and $41 in SECTOR ZERO. On a 80 track disk, 
sector 0 should start with $000B40 (2880 decimal).

Regards, Bob Devries

--
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: "George Ramsower" <georgeramsower at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Monday, March 01, 2010 10:29 AM
Subject: Re: [Coco] Nitros9 on a CC3 512k


> >On Sunday 28 February 2010, George Ramsower wrote:
>>> Finally I get around to play with Nitros9, build a boot disk on my XP 
>>> box
>>>using Cocodisk from nos96809l2v030208coco3_80d.dsk and it has a problem.
>>> First, I used cocodisk to format the 720K 3.5" disk with 80 track, two
>>>sided. Then did the "Write to disk" to do this.
>>> The coco does boot and gets as far as the startup file and hangs.
>>> Rebooting with a working OS9 disk and looking at the Nitros9 disk 
>>> reveals
>>>that the root directory appears to be intact but I cannot list the 
>>>startup
>>>file or peer into the cmds directory. Error 247.
>>> I tried formatting a floppy on the coco and trying again but, with the
>>> same result.
>>>
>>> I would offer more info but don't what to tell you. Ask me questions and
>>> I will begin the discovery process as to why I'm getting this problem.
>>>
>>> Thanks,
>>>
>>>George
>>
> On Sunday 28 February 2010, Gene Heskett wrote:
>
>>I have found that the default build does not properly identify the disk
>>images format, and have had to edit it with a hex editor, changing the
>> bytes at offset $10, and again at $41 I believe, to (if using the 80 
>> track
>> image, $07 at 10, and $03@$42).
>>
>
> Beginning at $40, I see "OS9BOOT"
>
> I think this might be the wrong place to look with DED. Or I'm looking at 
> the wrong thing.
> George
>
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