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

[Hot Rod <hotrod.apple2@gmail.com>]

On Wednesday, October 24, 2012 5:50:12 PM UTC-5, Steve Nickolas wrote:
> 5. The mystery function at E81 starts reading a table and translating it
> 
>     into calls to $03D9 and $03B0.
> 


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. 

]HR