Re: Trying to work out how to support non-MLI smartport calls

["ict@ccess" <gids.rs@sasktel.net>]

On Jun 27, 12:00 pm, BLuRry <brendan.rob...@gmail.com> wrote:
> Is there a good resource for explaining the ins and outs of smartport from a non-MLI perspective?  I tried to make sense of the //gs firmware guide but it was a slight-bit obtuse.
>
> What I'm really after is to support the direct disk reads in the Prince of Persia 3.5 version -- specifically where it calls DRIVER_OFFSET+3, DRIVER_OFFSET+4 and DRIVER_OFFSET+6, where DRIVER_OFFSET is generally $0A in the //gs and //c firmware (I confirmed this much by powering up my //c and //gs machines.)  I know that JSR or JMP to DRIVER_OFFSET goes to the MLI command handler, and I've supported that much for quite a while.  But I'm ready to evolve my .2mg support of non-prodos games.
>
> The PoP source for smartport routines is here, and the call I'm talking about specifically is on line 252:https://github.com/jmechner/Prince-of-Persia-Apple-II/blob/master/02%...
>
> Thanks!
> -Brendan

does this help?

http://www.1000bit.it/support/manuali/apple/technotes/smpt/tn.smpt.8.html