[Coco] Sdc question

[Barry Nelson]

>> Can anyone help with the issue I have opening the device? Will I have to
>> talk to the hardware directly?
>
> Opening /sd0@ for reading should work.  Tim Lindner's latest version of
> SDIR uses the following code to open the device:
> 
> sdcPathName
>     fcc    ./sd0 at .
>     fcb    C$CR
>
> * open path to driver
> * uses A, X
> open_path_to_driver
>     leax   sdcPathName,pc
>     lda    READ.+PREAD.     open for reading
>     os9    I$Open
>     lbcs   noDriverError    Fail if not opened
>     sta    pathnumber,u
>     rts
>	
> - Darren

That only works if there is a "disk" inserted. If there is no media inserted, then that yields an error 246.
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