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Groups > comp.sys.apple2.programmer > #5304

Re: Double Lo-Res Broken on the IIe card (Macintosh)?

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On 2019-10-15 21:39:53 +0000, Andy McFadden said:

> On Tuesday, October 15, 2019 at 12:20:22 PM UTC-7, Steve Nickolas wrote:
>> It looks like if you find $02 at $FBDD and $00 at $FBBE that you've got a
>> Macintosh.  Double-check this maybe - I'm looking at code of mine I
>> haven't checked in about 10 years.
> 
> https://retrocomputing.stackexchange.com/a/366/56

If you check for $00 at $FBBE you will miss all but the first version 
of the "IIe Startup" application.

Note the technote says:  Location "$FBBE is the version byte for the 
Apple IIe Card (just as $FBBF is the version byte for the Apple IIc 
family) and is $00 for the first release of the Apple IIe Card."

An additional caveat is that the old M68K/PPC emulator "IIe" also has 
$02 at $FBDD, but the authors didn't know *why* that value is there in 
the IIe Card's firmware.  The reason it's there is to trap the BELL 
routine to play the sound configured in the IIe startup application.  
Though perhaps there aren't many users of "IIe," it can be ruled out by 
checking $FBDE, which in the IIe Card is always $01, whereas "IIe" is 
something else.

The palettes used by the IIe Card are resources in the "IIe Startup" 
application.  I don't recall if there are two pallettes for DGR, but 
more than likely the problem is in the screen emulation code and not 
the palettes.

MG

P.S. All of my notes on the IIe Card are here: 
http://apple2.guidero.us/doku.php/mg_notes/iie_card/start

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Double Lo-Res Broken on the IIe card (Macintosh)? Paul MacMillan <paul.s.macmillan@gmail.com> - 2019-10-13 08:09 -0700
  Double Lo-Res Broken on the IIe card (Macintosh)? Antoine Vignau <antoine.vignau@laposte.net> - 2019-10-13 08:41 -0700
    Re: Double Lo-Res Broken on the IIe card (Macintosh)? Paul MacMillan <paul.s.macmillan@gmail.com> - 2019-10-13 09:13 -0700
      Re: Double Lo-Res Broken on the IIe card (Macintosh)? Paul MacMillan <paul.s.macmillan@gmail.com> - 2019-10-13 10:09 -0700
        Re: Double Lo-Res Broken on the IIe card (Macintosh)? inexorabletash@gmail.com - 2019-10-13 14:11 -0700
        Re: Double Lo-Res Broken on the IIe card (Macintosh)? Brian Patrie <bpatrie@bellsouth.spamisicky.net> - 2019-10-14 02:15 -0500
          Re: Double Lo-Res Broken on the IIe card (Macintosh)? Steve Nickolas <usotsuki@buric.co> - 2019-10-15 15:20 -0400
            Re: Double Lo-Res Broken on the IIe card (Macintosh)? Andy McFadden <thefadden@gmail.com> - 2019-10-15 14:39 -0700
              Re: Double Lo-Res Broken on the IIe card (Macintosh)? MG <mg@zlink.us> - 2019-10-16 11:15 -0700
  Re: Double Lo-Res Broken on the IIe card (Macintosh)? Steve Nickolas <usotsuki@buric.co> - 2019-10-13 19:33 -0400

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