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Groups > comp.sys.apple2.programmer > #2613

Re: Activating Soft-Switches in Assembly

From D Finnigan <dog_cow@macgui.com>
Newsgroups comp.sys.apple2.programmer
Subject Re: Activating Soft-Switches in Assembly
Date 2016-03-30 18:28 +0000
Organization Mac GUI
Message-ID <dog_cow-1459362685@macgui.com> (permalink)
References <634b1674-1319-4795-b04c-37e52130c2b0@googlegroups.com> <f001e439-1c94-42cb-9404-121c572f9756@googlegroups.com>

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alxmist wrote:
>
> and how do I activate them either way? Do
> the $C050's require a JSR?
>

No, you just reference the location with a load instruction. Use whichever
(A,X, or Y) is convenient in your code.

Don't try to JMP or JSR to the soft switch location, because there's no
valid instructions there for the 6502 to execute.

-- 
]DF$
The Marina IP stack for Apple II--
http://marina.a2hq.com/

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Activating Soft-Switches in Assembly alxmist@aol.com - 2016-03-29 09:00 -0700
  Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-29 15:14 -0700
  Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-29 15:28 -0700
    Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-29 15:32 -0700
      Re: Activating Soft-Switches in Assembly alxmist@aol.com - 2016-03-30 09:31 -0700
        Re: Activating Soft-Switches in Assembly Antoine Vignau <antoine.vignau@laposte.net> - 2016-03-30 10:58 -0700
          Re: Activating Soft-Switches in Assembly alxmist@aol.com - 2016-03-30 11:23 -0700
            Re: Activating Soft-Switches in Assembly D Finnigan <dog_cow@macgui.com> - 2016-03-30 18:28 +0000
              Re: Activating Soft-Switches in Assembly Michael J. Mahon <mjmahon@aol.com> - 2016-03-30 23:46 -0500
              Re: Activating Soft-Switches in Assembly mmphosis <mmphosis@macgui.com> - 2016-03-31 16:07 +0000
            Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-30 14:10 -0700
        Re: Activating Soft-Switches in Assembly gids.rs@sasktel.net - 2016-03-30 13:06 -0700
          Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-30 14:13 -0700
            Re: Activating Soft-Switches in Assembly gids.rs@sasktel.net - 2016-03-31 08:25 -0700
              Re: Activating Soft-Switches in Assembly alxmist@aol.com - 2016-03-31 08:52 -0700
                Re: Activating Soft-Switches in Assembly Michael J. Mahon <mjmahon@aol.com> - 2016-03-31 11:30 -0500
                Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-31 12:33 -0700
                Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-31 12:59 -0700
                Re: Activating Soft-Switches in Assembly Mark Calderbank <noname@test.com> - 2016-04-01 15:54 +0100
                Re: Activating Soft-Switches in Assembly Mark Calderbank <mark@zoot.loggytronic.net> - 2016-04-01 16:36 +0100
                Re: Activating Soft-Switches in Assembly alxmist@aol.com - 2016-04-01 09:58 -0700
                Re: Activating Soft-Switches in Assembly Michael J. Mahon <mjmahon@aol.com> - 2016-04-01 17:07 -0500
                Re: Activating Soft-Switches in Assembly Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-04-01 17:45 -0700
                Re: Activating Soft-Switches in Assembly alxmist@aol.com - 2016-04-05 08:59 -0700
            Re: Activating Soft-Switches in Assembly "Michael J. Mahon" <mjmahon@aol.com> - 2016-03-31 12:28 -0700

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