[Coco] Issues with 26-3022 interface

[Arthur Flexser]

Marty Goodman published utilties in the June, 1986 Rainbow to allow
transfer of files (maybe ASCII only?) between a PC and a CoCo via floppies.

Art
On Tue, Feb 12, 2013 at 9:12 PM, Juan Castro <jccyc1965 at gmail.com> wrote:

> Your floppies have been formatted with 256 byte sectors. Each track has 18
> sectors of 256 bytes instead of 9 sectors of 512 bytes like in a 720KB PC
> disk. You'll need to (a) get a PC with a FDC old enough to read that, and
> (b) get some DOS software that can program the FDC and read/write a 256
> byte formatted disk. That will be a challenge. Anyone here has successfully
> done that?
>
> On Tue, Feb 12, 2013 at 1:26 PM, Daniel Campos <daniel.campus at gmail.com
> >wrote:
>
> > Hi Mark,
> >
> > I understand your point, as this subject have probably been talked on
> this
> > list many times over. But my main purpose is to pass disk images from a
> PC
> > (through emulator or some other program) and run them on the Coco. I
> don't
> > have any legacy 5 1/4 disks to worry about, so if I can do this work on
> a 3
> > 1/2 floppy, for me is the best choice.
> >
> > I will try now to transfer some images from the PC to this disks and
> let's
> > see how will it work...
> >
> > Thanks!
> > Daniel
> >
> > Em 12/02/2013 13:04, Mark Marlette escreveu:
> >
> >  Daniel,
> >>
> >> Understand the beast in which you are trying to tame.......... :)
> >>
> >> Go read what occurs and the differences between all of the disk formats
> >> and densities on a hardware and software level.
> >>
> >> You will then realize as it 'might' appear to have worked, you are in
> >> violation of the specs.
> >>
> >> This has been beat to death here. Follow the specs and it will always
> >> work.  You are flirting with diasater if you assume it is working, IMHO.
> >>
> >> Regards,
> >>
> >> Mark
> >>
> >> http://www.cloud9tech.com
> >>
> >>
> >>
> >> ______________________________**__
> >>   From: Daniel Campos <daniel.campus at gmail.com>
> >> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> >> Sent: Tuesday, February 12, 2013 8:50 AM
> >> Subject: Re: [Coco] Issues with 26-3022 interface
> >>   Mark,
> >>
> >> Em 12/02/2013 11:56, Mark Marlette escreveu:
> >>
> >>> Daniel,
> >>>
> >>> This HD mod was created by Robert Brose of our computer club many years
> >>> ago.
> >>>
> >>> I have done this mod, it works. I also added a line from the controller
> >>> to the drive to automatically switch the transfer rate clock based
> upon the
> >>> sensors in the drive rather than just the descriptor.
> >>>
> >>> With that said...this is NO easy mod. Almost easier making a new
> >>> controller.
> >>>
> >> Yes, for what I saw from the document that Harry sent, it will be no
> >> easy task.
> >>
> >>  It requires a the MB8877A(??) memory loss ATM upgrade and then there
> was
> >>> also a speed issue running at 1.78MHZ as well. A chip that needed
> >>> replacing. Was pinged this past weekend on this at Cloud-9 and haven't
> had
> >>> the chance to look up my work in my project documentation book. I have
> it.
> >>>
> >>> The file was up on RTSI for a long time. ????
> >>>
> >>> Regards,
> >>>
> >>> Mark
> >>> http://www.cloud9tech.com
> >>>
> >>>
> >>>
> >>>  Ou of curiosity, I just attached today a 3 1/2 1.44M drive to the Coco
> >> and it worked flawlessly! It formated the disk (a HD disk with the role
> >> closed to make the drive understand it as 720Kb disk) and SAVEd and
> >> LOADed some programs. No errors ocurred during the format process!
> >> How can I check the disk to see if it was formated properly ?
> >>
> >> This drive is a Mitsumi D359M3D and was already configured to DS0,
> >> because I used it before with one of my MSX machines.
> >>
> >> Thanks!
> >>
> >> Daniel
> >>
> >>
> >>
> >>
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