[Coco] C+ Dos

[rietveld rietveld]

Yes. You are right.   You can hear the drive stepping at the higher rate then failing with an I/O error.   This happens when I use the CDOS with a early style full height drive(3029).   When I connected the CDOS controller to a later model fd502 it works fine. I guess the full height drives can't handle the faster step rate?

Sent from my BlackBerry 10 smartphone.
  Original Message
From: Arthur Flexser
Sent: Tuesday, August 28, 2018 5:17 AM
To: CoCoList for Color Computer Enthusiasts
Reply To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] C+ Dos


What exactly happens when you try DIR or LOADM?   Do commands like PEEK
work that don't involve disk access?

Is it possible that CDOS is trying to do disk access using a faster step
rate (6 ms?) than your drive can handle (30 ms is the Tandy default).

Art

On Mon, Aug 27, 2018 at 9:22 PM, rietveld rietveld <rietveldh at hotmail.com>
wrote:

> I found CDOS in the archive
>
>
> I still need to figure out why it is not working with my drive
>
>
> http://www.colorcomputerarchive.com/search?q=c-dos&ww=0&cat=&cs=0
>
> TRS-80 Color Computer Archive<http://www.colorcomput
> erarchive.com/search?q=c-dos&ww=0&cat=&cs=0>
> www.colorcomputerarchive.com
> TRS-80 Color Computer Archive
>
>
>
>
> ________________________________
> From: Coco <coco-bounces at maltedmedia.com> on behalf of Arthur Flexser <
> flexser at fiu.edu>
> Sent: August 27, 2018 7:56:40 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] C+ Dos
>
> It had some extra commands.  There may be documentation for the various
> Disto products, including CDOS in some CoCo archive.  Or CDOS may have been
> reviewed in Rainbow or other CoCo magazines.  (I just did a quick google
> search but no luck in finding the CDOS command list.)  I do remember there
> was a command that would reserve a screen line for a clock display.  CLOCK
> ON, maybe.  Designed to work with DIsto's real-time clock in the
> controller.  But if DIR doesn't work, you have some other problem.  In
> addition to cleaning the edge contacts, you could try reseating the CDOS
> ROM in its socket.  (I'm assuming that the plus in C+ DOS indicates it is
> somebody's homebrew modification of CDOS, but it might be something else
> entirely.)
>
> Art
>
> On Mon, Aug 27, 2018 at 7:09 PM, rietveld rietveld <rietveldh at hotmail.com>
> wrote:
>
> > thank you.    Do you kknow what the differences were between standard
> > rsdos?
> >
> > ________________________________
> > From: Coco <coco-bounces at maltedmedia.com> on behalf of Arthur Flexser <
> > flexser at fiu.edu>
> > Sent: August 27, 2018 4:34:31 PM
> > To: CoCoList for Color Computer Enthusiasts
> > Subject: Re: [Coco] C+ Dos
> >
> > CDOS was from CRC Systems of Montreal, who are better known for the Disto
> > controllers and other hardware
> >
> > Not compatible with the CoCo 3, (maybe they came out with CDOS-3 later)
> but
> > stuff like DIR and LOADM should work on a CoCo 1/2.  Maybe clean the edge
> > connectors?
> >
> > Art
> >
> > On Mon, Aug 27, 2018 at 4:28 PM, rietveld rietveld <
> rietveldh at hotmail.com>
> > wrote:
> >
> > > I just received a disk controller from a member of this list. It just
> > > displays a screen of garbage when in my coco3. When I power on my
> coco1/2
> > > with it it simply boots up saying ' C+ DOS'. None of the standard disk
> > > commands seem to work; like DIR,LOAD(M) ect
> > >
> > > Does anyone have info on this DOS
> > >
> > > Sent from my BlackBerry 10 smartphone.
> > >
> > > --
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> > >
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