[Coco] [Color Computer] Nitros9 Boot file

[Boisy Pitre]

On Nov 23, 2006, at 6:27 AM, Mark Marlette wrote:

> Jim,
>
> Good work. Raises a question....
>
> Boisy - Is the bootfile allowed to be fragmented. I know we talked
> about it.????

NitrOS-9 V3.2.6 allows for fragmented bootfiles on the disk, but it  
will load in memory as one contiguous blob.  There is no restriction  
about modules needing to start on a block or page boundary, but $8200  
seems to be the limit for reasons I'll have to research.  Good work Jim.

> Mark
> www.cloud9tech.com
>
>
> Quoting Jim Hickle <jlhickle at yahoo.com>:
>
>> Tonight I made 10 bootfiles -- started with one that
>> worked, added a bunch of modules, then removed them
>> until it would successfully boot.  So far, i've found
>> that os9boot of $8200 or less will allow a successful
>> boot.  And it will not boot if os9boot is $822F.
>>
>> I'm wondering whether the modules once in memory are
>> contiguous or there may be some gaps. Does the start
>> of a module have to be on a block or page boundary?
>>
>> I'll continue the experiment tomorrow. (The Lord
>> willing, of course.)
>>
>> -jim
>>
>> --- Boisy Pitre <boisy at boisypitre.com> wrote:
>>
>>> I think Jim is hitting the size limitation of a
>>> bootfile.  I don't
>>> know the exact size, but once your bootfile gets
>>> beyond a certain
>>> point there is an issue.
>>>
>>> Jim, try removing your RS-232 module and pear down
>>> your bootfile down
>>> a bit.  Better yet, report the size in bytes of the
>>> bootfiles that
>>> are working and failing.  That will give us some
>>> clue as to the range
>>> of the size limit.
>>> --
>>> Boisy G. Pitre
>>> 337.781.3570 mobile
>>> email: boisy at boisypitre.com
>>> Website: www.boisypitre.com
>>>
>>> "If there is truth to the proposition that knowing
>>> the past helps us
>>> to understand the present, I believe there is at
>>> least as much truth
>>> to the proposition that what we know of the present
>>> is crucial to our
>>> understanding of the past.  What we have not
>>> ourselves experienced or
>>> observed we can at most only partially and
>>> imperfectly comprehend;
>>> and I suspect that there is much in history that is
>>> so remote from
>>> our own experiences or observations as to be largely
>>> beyond our
>>> understanding." - Kenneth M. Stamp
>>>
>>>
>>>
>>> On Nov 22, 2006, at 8:15 AM, Robert Gault wrote:
>>>
>>>> Jim Hickle wrote:
>>>>
>>>>> I use the scripts from the current distribution.
>>>>> I made working boot disks in this order:
>>>>> 1. unmodified boot
>>>>> <snip>  We really need the actual bootlist not "I
>>> did this and
>>>>> then that" to
>>>> debug a boot order list problem. In fact, I'm
>>> surprised that you have
>>>> one as I thought that was confined to the floppy
>>> disk system modules.
>>>>
>>>>> 8. tried adding CDF modules. Tried moving RAM
>>> disk modules then
>>>>> took them out.
>>>>> Last item reported on boot is: i2xo
>>>>
>>>> Now that is exactly the type of info we need. i2xo
>>> means that the Init
>>>> module was found, entered os9p2 (krnl2), and tried
>>> to open the default
>>>> Init device. There actually should then follow an
>>> error code but if
>>>> the
>>>> system hung at this point, it suggests a problem
>>> with the type of
>>>> screen
>>>> used for /term.
>>>>
>>>> Is this on a real Coco or emulator? How much
>>> memory is available? Is
>>>> your /term a 32, 40, or 80 width screen? Are the
>>> matching drivers for
>>>> /term part of the boot file? If 40 or 80 width
>>> type /term, is
>>>> grfdrv in
>>>> the CMDS directory? The latter is a typical cause
>>> for failure at
>>>> i2xo in
>>>> the boot process.
>>>>
>>>>> Six attempts to reboot:
>>>>> 1. no furthur activity
>>>>> 2. screen goes blank
>>>>> 3. black & white checkerboard with green border
>>>>> 4. "Failed" message
>>>>> 5 & 6. screen filled with random text
>>>>> 7. screen of random text, then black border,
>>> white screen with a
>>>>> few blue & black vertical stripes and loss of
>>> vertical sync.
>>>>>
>>>>> Have to run off to work now, but will get ident
>>> of working and not
>>>>> working os9boot files.
>>>>>
>>>>> Thank you!
>>>>> jim hickle
>>>>>
>>>>
>>>>
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>>>
>>>
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>>
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