Re: Upgrading the Apple][ to //e

[dempson@actrix.gen.nz (David Empson)]

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.  :-)

> (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).

-- 
David Empson
dempson@actrix.gen.nz