[Coco] Create Nitros9 DSK on SDC

[Bill Nobel]

Hi Jeff, I found SDC-DOS doesn’t extend images automatically. The SDC direct commands to create  DSK defaults the disk to 35 try single sided. SDF you can specify the number of cylinders.

 Nitros9 will not support SDF images, but it does auto expand images with the Format command in conjunction with Dmode.  I’ve experimented with SDF in Nitros9 and all I get is error 242 or 244.  It seems the Nitros9 drivers are seeing the inner SDF sector padding (crc’s and such)

Bill

Sent from my iPad

> On Aug 20, 2020, at 11:31 PM, Jeff Teunissen <deek at d2dc.net> wrote:
> 
> The CoCo SDC does not extend a disk like an emulator can, so disk
> image files have to be full-sized. To the best of my knowledge, you
> can't make an image larger than 40-track, double-sided using SDC-DOS
> (and I don't recall there being a way to make a new image from
> (Nitr)OS-9).
> 
> .DSK images are always the same size when created by SDC-DOS, 157.5K;
> they're only ever 35 tracks.
> 
> The way to create a DSDD image is using DRIVEx,"DISKNAME.SDF",NEW++
> (that gets you 40 tracks, double sided).
> 
> Once the disk image is created, you can boot NitrOS9 and format the
> new disk (just as you still need to DSKINI a disk image you created in
> SDC-DOS) just like formatting any other floppy.
> 
> If you're talking about the giant super-floppies we use as hard
> drives, the simple answer is, "you can't". You can make an image with
> Toolshed, using the command:
> 
>    os9 format DSK_NAME.VHD -n"My Disk" -e -t29126
> 
> the -t29126 tells it to make the disk (which is otherwise exactly like
> a single-sided floppy) have 29126 tracks on it, which makes it almost
> the largest possible disk which still uses only 1 sector per cluster
> -- the disk is 127.95 megs.
> 
> The -e makes the disk image full-sized, which lets the CoCoSDC not choke on it.
> 
> Then just copy the image to your SD card.
> 
>> On Mon, Aug 17, 2020 at 5:12 PM Ed Orbea <ed.orbea at gmail.com> wrote:
>> 
>> I know how to create blank disks on an SDC (DRIVE 0,"DSK_NAME.DSK",NEW
>> and  DRIVE 0,"DSK_NAME.SDF",NEW+) that cna be used to RS-DOS.
>> 
>> However, how can I create a blank Nitros9 dsk?
>> 
>> Thanks
>> 
>> 
>> 
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