[Coco] Dmode Settings

[Aaron Wolfe]

FWIW, a .dsk file is simply the sector data arranged in LSN order.
Physical attributes such as tracks, cylinders, sides have no meaning and
are not part of the dsk format at all, they are neither stored in the .dsk
file nor are the used in any way by software reading a .dsk file.
 On Jun 4, 2012 3:43 PM, "Stephen H. Fischer" <SFischer1 at mindspring.com>
wrote:

> Hi,
>
> Here is what comes up for VCC with no changes:
>
> nam=D0 mgr=RBF ddr=rb1773
> hpn=07 hpa=FF40 drv=00 stp=03 typ=20 dns=01 cyl=0028 sid=02
> vfy=01 sct=0012 t0s=0012 ilv=03 sas=08 wpc= ofs= rwc=
>
> The "dns=01 cyl=0028 sid=02" are the fields to change.
>
> 35 Tracks, cyl=23
>
> 40 Tracks, cyl=28
>
> 80 Tracks, cyl=50
>
> Number of sides can be sid=01 or sid=02.
>
> For all number of tracks less than 80, dns must be dns=01 (48 TPI).
>
> For 80 Track drives dns=03 (96 TPI) is correct.
>
> But many (MOST???) 3.5" 80 Track 2 Sided drives / disks have dns=01 which
> I have previously stated is incorrect as 720K 3.5" floppies are 96 TPI.
>
> ------------------------------**--------------------------
> Now, as to .dsk files.
>
> As I have used at least three methods of converting my floppy disks to
> .dsk files I have a mix of dns=01 and dns=03 for my 80T 2S disks. If I get
> an error I just DMODE /D0 dns=01 or dns=03 and all is fine until another
> .dsk file is mounted.
>
> The utility "lsn0" on the SHF888 disk on my web site will display the
> information for a .dsk file if you need to figure out what a .dsk file has
> to set up the descriptor to read it.
>
> NOTE!!!! SHF888 is a work in progress, it does not have the documentation
> I plan to add before announcing it. It is intended to be a programmers VCC
> NitrOS-9 survival kit.
>
> ------------------------------**--------------------------
>
> Dean: the text of your posts is coming across as an attachment for me.
>
> I made the same mistake a few months back but I now have forgotten what
> caused it, perhaps changing the character set or pasting from my word
> processor.
>
> SHF
>
>
> ------------------------------**--------------------------
>
>
> ----- Original Message ----- From: "Dean Leiber" <adit at nationsdial.com>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Sunday, June 03, 2012 8:06 PM
> Subject: [Coco] Dmode Settings
>
> Hi All!
>
> Does anyone have a listing of the dmode settings for the various Floppy
> Drive Sizes?
>
> Thanks!
>
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/**mailman/listinfo/coco<http://five.pairlist.net/mailman/listinfo/coco>
>