Re: And the trace begins... Pick-A-Dilly Pair

[Steve Nickolas <usotsuki@buric.co>]

On Wed, 24 Oct 2012, Hot Rod wrote:

> See page 6-4 of Beneath Apple DOS.  These are just straight calls to 
> RWTS directly, after setting up an input/output control block (IOB) via 
> the DOS-supplied subroutines.
>
> So while there are files on the disk (and a VTOC), the program maintains 
> its own track/sector lists apparently, and makes these calls via RWTS to 
> load them.  Hard to know if that's due to the crack, or if that's how 
> the original disk was.
>
> Since this is using regular DOS 3.3 RWTS, it matches the info in Beneath 
> Apple DOS.  Any calls to $3D9 are going to lead to disk access; seems 
> unlikely they'd deviate or bypass that.

The API is baroque as hell.  It doesn't seem to be as simple as "put a 
disk location here, put a target address here, then do this" like the PC, 
but you would really think that's all there is to it. o.o;

The DOS is pretty bogstock, as far as DOS goes.  That might be Reset 
Vector's doing, I have no way of knowing.

-uso.