[Coco] CoCoSDC: Using RS-DOS for new .DSK image file size?

Allen Huffman alsplace at pobox.com
Fri Dec 19 12:02:48 EST 2014


> On Dec 19, 2014, at 10:48 AM, Ciaran Anscomb <cocomalt at 6809.org.uk> wrote:
> 
> Allen Huffman wrote:
>> On Dec 19, 2014, at 10:37 AM, Ciaran Anscomb <cocomalt at 6809.org.uk>
>> wrote:
>> 
>> What does DSKINIT do compared to CoCo's DSKINI? I gather it's issuing
>> TRACK FORMAT commands to the drive controller chip, and CoCoSDC does not
>> expand on those (only WRITE commands) which is the issue?
> 
> Yep, that's the size of it.
> 
> DOSplus defaults to verifying by reading sectors in turn after the disk
> is formatted, so it errors out because those later tracks never ended
> up actually "existing".

Ah, so that's one thing that isn't compatible, but the DSKO$/SWRITE is a workaround. CoCoSDC would need to be updated to also expand based on a disk format, to fully work like the original hardware, I suppose.

		-- A



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