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

[Bob Devries]

My suggestion on this would be to write a psuedo-random number to an unused 
sector (such as sector 1 of track 17) and read that into memory when the 
programme runs and check for a change of that number whenever you access the 
disk to write to it.

I believe that OS-9 does this to some extent; at least there is an ID number 
in LSN0 of each disk.

----- Original Message ----- 
From: "Brett Heath" <bkheath at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Monday, November 10, 2008 7:49 PM
Subject: Re: [Coco] f83 for the CoCo, Update and a laundry-list of 
questions.


> On 11/9/08, Darren A <mechacoco at gmail.com> wrote:
>> On 11/9/08, Brett Heath wrote:
>>
>>>>
>>>> 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.
>>>
>>
>> Don't bother. The Disk Change signal is not connected to anything on
>> CoCo controllers.
>
> Yeah, it figures.
>
> Oh well, have to try something else, thanks for the help.
>
> Brett K. Heath
>
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