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Groups > comp.sys.apple2.programmer > #3303

Re: running programs in aux memory

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On 02-Mar-17 12:10, Mark Lemmert wrote:
> I’m about to do some experimenting (for the first time) with using
> XFER ($C314) to pass control to a subroutine in AUX memory. I’m
> planning having my main program (in main memory) and the aux
> subroutine share the main memory stack and zero page
>
>
> In this scenario, the material on this subject in “Inside the Apple
> IIe” recommends saving the stack before passing control to the aux
> program and restoring the before returning control to the main memory
> program.
>
> I’m guessing that this is a safety net recommendation rather than a
> requirement and would like to double check.
>
> As long as the subroutine in aux memory removes all the bytes from
> the stack that it adds (and doesn’t remove more bytes than it adds),
> wouldn’t the stack contents and stack pointer be in the exact same
> state as when control was transferred to the aux subroutine?
>
>
> Thanks much for any advice anyone has!
>
>
> Mark
>


Tom Porter has a Sound Routine, SFX that runs from the Aux Memory...

I don't know if he follows c.s.a2.p, but I will give him a "heads up"....


MarkO

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Thread

running programs in aux memory Mark Lemmert <mark.lemmert@gmail.com> - 2017-03-02 12:10 -0800
  Re: running programs in aux memory "Mark D. Overholser" <marko@markoverholser.com> - 2017-03-02 14:18 -0800
    Re: running programs in aux memory Mark Lemmert <mark.lemmert@gmail.com> - 2017-03-03 11:08 -0800
  Re: running programs in aux memory roger.shimada@gmail.com - 2017-03-02 20:41 -0800
    Re: running programs in aux memory Mark Lemmert <mark.lemmert@gmail.com> - 2017-03-03 11:18 -0800
      Re: running programs in aux memory roger.shimada@gmail.com - 2017-03-05 09:13 -0800
        Re: running programs in aux memory 6502workshop@gmail.com - 2017-03-05 20:11 -0800
  Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-03 00:50 -0800
    Re: running programs in aux memory qkumba <peter.ferrie@gmail.com> - 2017-03-03 08:47 -0800
      Re: running programs in aux memory Mark Lemmert <mark.lemmert@gmail.com> - 2017-03-03 11:08 -0800
        Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-03 12:55 -0800
          Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-03 13:00 -0800
            Re: running programs in aux memory Antoine Vignau <antoine.vignau@laposte.net> - 2017-03-03 19:53 -0800
              Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-03 20:41 -0800
                Re: running programs in aux memory qkumba <peter.ferrie@gmail.com> - 2017-03-03 21:43 -0800
                Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-04 08:37 -0800
                Re: running programs in aux memory Antoine Vignau <antoine.vignau@laposte.net> - 2017-03-04 11:02 -0800
                Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-04 13:54 -0800
                Re: running programs in aux memory gids.rs@sasktel.net - 2017-03-05 15:58 -0800
                Re: running programs in aux memory John Brooks <jbrooks@blueshiftinc.com> - 2017-03-05 20:16 -0800
                Re: running programs in aux memory qkumba <peter.ferrie@gmail.com> - 2017-03-06 09:30 -0800
                Re: running programs in aux memory qkumba <peter.ferrie@gmail.com> - 2017-03-04 22:11 -0800
            Re: running programs in aux memory Michael Pohoreski <michael.pohoreski@gmail.com> - 2017-03-15 19:06 -0700
    Re: running programs in aux memory Benoit0123 <bgilon@free.fr> - 2017-03-06 00:20 +0000
  Re: running programs in aux memory 6502workshop@gmail.com - 2017-03-05 20:13 -0800
  Re: running programs in aux memory laseractiveguy@gmail.com - 2017-03-08 16:33 -0800
  Re: running programs in aux memory laseractiveguy@gmail.com - 2017-03-08 17:04 -0800

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