Re: Upgrading the Apple][ to //e

[mjmahon@aol.com (Michael J. Mahon)]

David Empson replied:

>Michael J. Mahon <mjmahon@aol.com> wrote:
>
>> David Empson wrote:
>> 
>> <snip>
>> 
>> >There are some other minor details, such as the self-test code in the
>> >$C100-$C7FF area
>> 
>> David, it is a rare day when I find an inaccuracy in one of your
>> posts--I consider them the gold standard--but I just happen to
>> be looking carefully at this very topic this week!  (I'm planning
>> some ROM additions.  ;-)
>> 
>> In the unenhanced //e, the self test code is in $C401..$C7FF.
>> Contrary to what the Reference Manual says, the $C100..
>> $C2FF region is dispatching code and additional 80-column
>> code.
>
>In what way was my message inaccurate?  I said the self-test code was in
>the C100-C7FF area, and C401-C7FF is in that area.  I didn't mean to
>imply that all that area was occupied by the self-test code.  :-)

My apologies--your statement is strictly accurate.

I thought that you were going by the original //e Reference,
which (incorrectly) states that the diagnostic code is from
$C100 to $C2FF and $C400 to $C7FF, which is "accurate"
in the same way as saying that the diagnostic code is in
$0000 to $FFFF.  ;-)

>> (BTW, does anyone know where I can find a source listing
>> of the unenhanced //e ROM?)
>
>It was published in a thin supplement which was included with the
>original edition of the IIe technical reference manual.
>
>Reference Manual Addendum:
>Monitor ROM Listings
>For //e Only
>
>(Part number 031-0357-A, published in 1982)
>
>It includes all of C100-CFFF plus F800-FFFF (no Applesoft, of course).

Thanks for jogging my memory on this--I knew that I had seen
the code somewhere!  Now, if I can just find my copy...

(I was going to mention that it does not contain the actual
self-test code, according to Jim Sather, but you know that.  ;-)

-michael

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