Re: Uploading to Asimov

[Ed Eastman <noone@nowhere.net>]

Simon wrote:
> The question may sound stupid but... The images I made are ".DO". Can I 
> simply change the extension to ".DSK", or is it a different format ?

Not stupid at all.  A DO is sector order in 256 byte chunks, PO is block 
order in 512 byte chunks.  A DO will be addressed with twice as many 
chunks as a PO.

A DO is a copy of all the sectors on a disk in sector or 'disk order'. 
First 256 bytes are Track 0 Sector 0, the next 256 bytes 0-1, ...

A PO is a copy of all the blocks on a disk in 'prodos order'.  The first 
512 bytes is block 0, the next 512 bytes is block 1, etc through the end 
of whatever media you are using.  140k is a 5.25, 800k is  3.5" disk, etc.

Either 5.25 inch (140k) disk image, DO or PO, can use the DSK extension, 
but normally they are DO images.  I think emulators look at the first 
256 bytes and if it's prodos, assume PO and assume DO for everything 
else when they encounter a DSK.

Thankx,
Ed

Of course I'd like to see a 400k DO image supported so I can make really 
big virtual Dos 3.3 diskettes. :)  (Hello Oliver/AppleWin developers, 
Andy/ Ciderpress)