[Coco] DriveWire with filesizes not divisible by 256

[CoCoList for Color Computer Enthusiasts]

On Sunday 11 May 2014 17:22:26 CoCoList for Color Computer Enthusiasts did 
opine
And Gene did reply:
> Aaron, I really don't think it would work without rewriting both DECB
> and the OS9 drivers. RSDOS and OS9 fill out the remaining portion
> (after EOF) of the last sector(s) differently. RSDOS reservers/writes
> in "granule" size chunks (as it's smallest possible file), the minimum
> of 9 sectors (1 gran=9 sectors). OS9 relies on the setting in the
> device descriptor for it's minimum.

And what fd.### that might be?
 
> What would be the advantages of doing this if it could be done?
> 
> 
> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
> 
> 
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
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> 
> 
> 
> -----Original Message-----
> From: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Sun, May 11, 2014 3:45 pm
> Subject: [Coco] DriveWire with filesizes not divisible by 256
> 
> 
> A couple survey responses have indicted a desire to use files of
> arbitrary size in DriveWire.
> 
> Since we only read/write 256 byte sized sectors, what is the correct
> way to do that?  Just fill the last sector with 0?  There isn't a way
> for the server to tell the coco what's part of the file and what's not
> in the last sector, and vice versa the file would become padded to 256
> byte boundary if the last sector is written, since coco can't tell
> server the same.  Does that matter?  It feels a bit dangerous.
> 
> -aaron
> 
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Cheers, Gene
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