[Coco] NitrOS-9 Boot help for CoCoDskUtil

[Bill Pierce]

Luis,
The OS9 boot section (trk 34) is loaded into RSDOS memory when the DOS command in entered. It loads the 18 sectors of track 34 to address &H2600 and then executed as any other machine language program. Once executed, it moves itself into place and starts setting up the OS9 system then loads the OS9Boot file from the location pointed to by the "boot" section of the the bootfile. Once the OS9Boot file is loaded, control is turned over to the OS9 system. It's a little more complex than this, but that's a rouch scetch of what happens.

The RUN"BOOT" used on early OS9 Level 1 version 1.0 OS9 disks was a basic loader for OS9 as the the early version of RSDOS had a disfunctional "DOS" comand. This why there was an RSDOS "boot" disk with level v1.00.
This was fixed with the next version of RSDOS and OS9 Level1 version 2.00.

Hope this helps
Bill P

Music from the Tandy/Radio Shack Color Computer 2 & 3
https://sites.google.com/site/dabarnstudio/
Bill Pierce
ooogalapasooo at aol.com




-----Original Message-----
From: Luis Fernández <luis46coco at hotmail.com>
To: COCO <coco at maltedmedia.com>
Sent: Sun, Mar 17, 2013 2:02 pm
Subject: Re: [Coco] NitrOS-9 Boot help for CoCoDskUtil


Well, I found a partial solution

Boot-DECB or BOOTTRACK apparently is always the same (18 sectors) (not different 
versions or types) and contains no header OS9 (File Descriptor Sector), nor does 
it appear in the DIR of OS9, but if booked and block sectors on the disk 
allocation map sector.
Surely, what to do, will simply copy the file to the track, and block sectors

Regarding OS9Boot file:

It is composed of modules that you choose, but if I can find as a weapon, if 
only to place the modules one after another, or have to give an index or 
dictionary.

I can copy is simply a OS9Boot there, but I wanted to act as OS9Gen + COBBLER, 
perhaps selected by checkmarck, adding modules to OS9Boot and other 
possibilities

> From: luis46coco at hotmail.com
> To: coco at maltedmedia.com
> Date: Sat, 16 Mar 2013 16:18:08 -0400
> Subject: [Coco] NitrOS-9 Boot help for CoCoDskUtil
> 
> I'm making my utility CoCoDskUtil portion Nitros9/OS9 new album and can not 
find information about the following:
> Sectors 1 and 2 are understood
> 
> 
> There are 2 Boots:
> 
> 1). - The BootDECB which is of a size of 4608 Bytes 18 sectors, which 
typically lies in the track 34 (starting from 0). These areas are marked 
(cleaned) in the bit map alocation. and used to run the command NITROS from DOS.
> 
> 2) And the OS9Boot which is the kernel of NITROS9
> 
> Now, I need to know if there are multiple versions of BootDECB, if this is 
true, would also need to know when to use each.
> 
> Also, I need to know if there are multiple versions of OS9Boot, I have seen 
that have different sizes, obiamente should have level 1,2, 3 and (60 Hz, 50 Hz) 
and DW.
> 
> The idea is that I can recreate a set of disks with Boot from zero
> 
> I appreciate any help in advance
> 
> --------------------------------------------------------------------------------- 

> Making  CoCoDskUtilPack V 1.1.5.zip, Scan magazines and organize maltedmedia
> http://cococoding.com/cocodskutil/ Thank Aaron Wolfe
> http://www.tandycoco.com Thank Brian Blake and Stephen Fischer
> My personal blog: http://www.luis45ccs.blogspot.com, 
> Excuse my English, I use google translator, my language is Spanish, I'm 
Spanish but I live in Venezuela
> --------------------------------------------------------------------------------- 		 	   		  

> 
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