[Coco] RGB Dos DECB disks accessed by NitrOS-9 on VCC
Stephen H. Fischer
SFischer1 at Mindspring.com
Wed Mar 28 17:57:05 EDT 2012
Thanks for the answer, it was what I expected.
That you actually wrote "HRSDOS" was not expected.
I do not think that the OP has any real need, just trying to understand.
If there is a follow-up question about the OS-9 program "RSDOS", I think
that was the last program I used twenty years or more ago and the scripts I
used to drive it are on my OS-9 disks somewhere.
Welcome to the CoCo Forums, are you planning to make a post to "NitrOS-9 on
VCC Advanced Topics" with this information?
The beginners thread IMHO is not the place to answer, I will add a post to
"NitrOS-9 on VCC for Beginners - Questions" announcing the Advanced Tops
thread which I have failed to do so far.
----- Original Message -----
From: "Robert Gault" <robert.gault at att.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, March 28, 2012 2:17 PM
Subject: Re: [Coco] RGB Dos DECB disks accessed by NitrOS-9 on VCC
> Stephen H. Fischer wrote:
>> I have been asked a question about NitrOS-9 on VCC accessing RGB Dos DECB
>> I punted with this answer:
>>> An expert on "RGB Dos" which I am not would need to answer the question
>>> if any
>>> of the 255 DECB floppies can be seen by NitrOS-9.
>> Second question, I am assuming the code is still in the driver to allow a
>> NitrOS-9 program to read / write DECB disks.
>> What is the name of the current software program and where is the
>> for it. I have used about four different programs in the past, each tied
>> to a
>> specific OS-9 version.
>> If you wish, you can respond in another thread I have created:
>> NitrOS-9 on VCC Advanced Topics
> There is a program, RSDOS, which I think reads Disk Basic disks under
> I don't think there is a similar program in the NitrOS-9 distribution.
> However, that is not sufficient to access the Basic drives on a .vhd disk.
> You would need one of two things. 1) To read OS-9 disks in the BASIC
> section of a .vhd drive you would need a driver and descriptor for the VCC
> emulator that knows the LSN offset for the Basic section and will
> translate on the fly Basic drive numbers into OS-9 logical sector numbers.
> 2) To read Disk Basic disks in the BASIC section, you need a program like
> RSDOS that incorporates the requirements listed in 1).
> I have written a program that reads Disk Basic disks, HRSDOS, patterned
> after RSDOS. It will work with both floppies and .vhd images or similar
> real hardware.
> I've also written a driver and descriptor that can read OS-9 disks in the
> BASIC section of a .vhd drive. I think that the Cloud-9 software for OS-9
> has that capability but can't find a reference to it.
> Coco mailing list
> Coco at maltedmedia.com
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