[Coco] Dragon SuperDos and Drivewire....

[Luis Fernández]

If I had the same problem CoCoDskUtil
The dragon has two DIR track track 20 and track 16 equal
I investigate glass in track 20 (18 Sectors per Track) and if the bytes are not


Track 20 Sector 1 Identifies the disk format as follows:
offset
Tracks on disk 0xFC
0xfd Sectors per track (36 Indicates double sided / 18 secs per track)
0xfe One's complement of offset 0xFC
One's complement of 0xff offset 0xfd


If not, look at two sides Track 20 = 36 * 20
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Excuse my English, I use google translator, my language is Spanish, I'm Spanish but I live in Venezuela
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> Date: Thu, 18 Oct 2012 22:05:04 +0100
> From: afra at aurigae.demon.co.uk
> To: coco at maltedmedia.com
> Subject: [Coco] Dragon SuperDos and Drivewire....
> 
> Hi All,
> 
> Here's the problem, I'd like to try dropping the Drivewire routines into 
> SuperDos, so that that DragonDos disks could be accessed via a Drivewire 
> server.
> 
> However at the lowest level I/O SuperDos deals with cylinders, heads and 
> sectors, whereas DW is completely LBA based. Now SD does record the 
> geometry of a disk in it's directory track, however this is track 20, 
> this is of course read when a disk is first accessed as on a physical 
> disk it is always in the same place c=20,h=0,s=1.
> 
> With the standard emulator format files which used interleaved sides, 
> this will mean for a double sided image that the directory track will be 
> in a different position to the single sided image, which would be a problem.
> 
> Is there a call in the currently existing DW protocol to get this 
> information from the image ? Or to get the file data length of the 
> image, even the max LBA sector number would give a hint.
> 
> Or if anyone has any suggestions of a way of dealing with this problem ?
> 
> As far as HDB-DOS goes, I gather from various things that I have heard 
> on here that you can have up to 255 virtual disks, are these all 
> accessible at the same time, or do you need to mount up to 4 images that 
> act as if they where 4 physical drives ?
> 
> Cheers.
> 
> Phill.
> 
> -- 
> Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
> 
> "You can twist perceptions, but reality won't budge" -- Rush.
> 
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