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Re: Booting the right ProDOS 8 for any Apple II

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On 7/10/2016 2:30 AM, Michael J. Mahon wrote:
> <roger.shimada@gmail.com> wrote:
>> From my just created
>> http://roger-s-stuff.blogspot.com/2016/07/booting-right-prodos-8-for-any-apple-ii.html :
>>  [...]
>
> Since ProDOS 1.9 works perfectly on all 64K machines, and any application
> on a "universal" disk will run under 1.9, what is the benefit to selecting
> a ProDOS version dynamically?

That would actually be a really great thing for ADTPro.  The boot 
diskette I supply has ProDOS 1.9 on it because of its near-universality, 
as you point out.  But there is true benefit to going to ProDOS 2.x for 
machines that can handle it because drives are enumerated 
differently/better - and more types of drives and partitions can be 
immediately recognized rather than having to create your own boot 
diskette (or run from some other kind of boot device).  There are cases 
where some drives that will be "missing" if you boot with 1.9 that are 
visible with 2.0.3.  I have the bug reports to prove it. :-)

So this thread got me to thinking.  I am really sensitive about boot 
times, so I'd be unwilling to pay the price to load _both_ and then 
discard one.  But I might consider a scheme where a machID is checked at 
boot0 time, then a decision is made which then loads the appropriate 
PRODOS chunk.  Then again - it only serves to complicate bare-metal 
bootstrapping.

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Thread

Booting the right ProDOS 8 for any Apple II roger.shimada@gmail.com - 2016-07-09 20:42 -0700
  Re: Booting the right ProDOS 8 for any Apple II Michael J. Mahon <mjmahon@aol.com> - 2016-07-10 01:30 -0500
    Re: Booting the right ProDOS 8 for any Apple II roger.shimada@gmail.com - 2016-07-10 15:09 -0700
      Re: Booting the right ProDOS 8 for any Apple II Steve Nickolas <usotsuki@buric.co> - 2016-07-10 19:34 -0400
        Re: Booting the right ProDOS 8 for any Apple II Don Bruder <dakidd@sonic.net> - 2016-07-10 17:48 -0700
    Re: Booting the right ProDOS 8 for any Apple II David Schmidt <schmidtd@my-deja.com> - 2016-07-11 09:40 -0400
      Re: Booting the right ProDOS 8 for any Apple II roger.shimada@gmail.com - 2016-07-11 18:41 -0700
        Re: Booting the right ProDOS 8 for any Apple II David Schmidt <schmidtd@my-deja.com> - 2016-07-11 23:11 -0400
  Re: Booting the right ProDOS 8 for any Apple II Delfs <eeastman@gmail.com> - 2016-07-18 05:55 -0700
    Re: Booting the right ProDOS 8 for any Apple II Antoine Vignau <antoine.vignau@laposte.net> - 2016-07-18 07:34 -0700
      Re: Booting the right ProDOS 8 for any Apple II John Brooks <jbrooks@blueshiftinc.com> - 2016-07-18 09:15 -0700
      Re: Booting the right ProDOS 8 for any Apple II "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-07-18 10:23 -0700
        Re: Booting the right ProDOS 8 for any Apple II gids.rs@sasktel.net - 2016-07-18 11:27 -0700
          Re: Booting the right ProDOS 8 for any Apple II John Brooks <jbrooks@blueshiftinc.com> - 2016-07-19 08:46 -0700
            Re: Booting the right ProDOS 8 for any Apple II "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-07-19 11:07 -0700
              Re: Booting the right ProDOS 8 for any Apple II retrogear <larrygr510@gmail.com> - 2016-07-19 11:42 -0700
                Re: Booting the right ProDOS 8 for any Apple II Antoine Vignau <antoine.vignau@laposte.net> - 2016-07-19 12:43 -0700
                Re: Booting the right ProDOS 8 for any Apple II "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-07-19 13:04 -0700
                Re: Booting the right ProDOS 8 for any Apple II Steve Nickolas <usotsuki@buric.co> - 2016-07-19 16:42 -0400
                Re: Booting the right ProDOS 8 for any Apple II "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-07-19 13:09 -0700
                Re: Booting the right ProDOS 8 for any Apple II Michael J. Mahon <mjmahon@aol.com> - 2016-07-19 16:10 -0500
                Re: Booting the right ProDOS 8 for any Apple II "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-07-19 14:25 -0700
                Assembler optimizations, was Re: Booting the right ProDOS 8 for any Apple II D Finnigan <dog_cow@macgui.com> - 2016-07-19 22:35 +0000
                Re: Assembler optimizations, was Re: Booting the right ProDOS 8 for any Apple II Michael J. Mahon <mjmahon@aol.com> - 2016-07-19 23:28 -0500
                Re: Booting the right ProDOS 8 for any Apple II Michael J. Mahon <mjmahon@aol.com> - 2016-07-19 23:28 -0500

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