[Coco] f83 for the CoCo, Update and a laundry-list of questions.

[Brett Heath]

On 11/9/08, Darren A <mechacoco at gmail.com> wrote:
> On 11/9/08, Brett Heath wrote:
>>
>> I wasn't clear.
>>
>> ...
>>
>> What I don't see how to do, and what will
>> become critical as I implement functions that
>> modify the FAT and/or Directory sectors, is a way to tell if the user
>> has changed the
>> diskette since the last time the drive was accessed.
>>
>> If I can't get this without Basic taking over on an error I'll have to
>> implement secondary
>> buffers to hold the unmodified FATS and do a read-back and compare
>> before any updates.
>> That's messy, slow, eats memory and will be another PITA on top of
>> having to emulate functions that should be available as system calls.
>>
>
> RSDOS does not provide any facility to detect if the user has changed
> diskettes in a drive. It very much relies on the user to do the
> correct thing by not changing disks while any files are open. There is
> an UNLOAD command in Disk Basic which is supposed to be used before
> switching disks to ensure that the current disk is updated if
> necessary.
>
> Darren

Damn, I was afraid of that.

Maybe I can get it directly from the controller chip, needs looking into.

Thanks for the reply

Brett K. Heath