is None or == None ?

Grant Edwards invalid at invalid.invalid
Tue Nov 10 17:46:38 CET 2009

On 2009-11-10, Marco Mariani <marco at> wrote:
> Grant Edwards wrote:
>> MacOS applications made the same mistake on the 68K.

> And and awful lot of the Amiga software, with the same 24/32
> bit CPU.
> I did it too, every pointer came with 8 free bits so why not
> use them?


I should probably add that MacOS itself used the same trick
until system 7.

>> It wasn't the decades-long global debacle that was the MS-DOS
>> memory model, but it did cause problems when CPUs came out that
>> implemented those address lines and RAM became cheap enough
>> that people needed to use them.
> I suppose that's the reason many games didn't work on the 68020+

Probably.  IIRC, it took a while for some vendors to come out
with "32-bit clean" versions of products.

Grant Edwards                   grante             Yow! I know how to do
                                  at               SPECIAL EFFECTS!!

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