Dan's suggestion worked: typing an exclamation inside the monitor brought me into the mini-assembler.

I need a book * specifically * for the enhanced/Platinum model. Otherwise I won't know which mistakes are mine vs which are differences in the computer.

Some of you will advise me to just get an older Apple II instead :) but I don't have space for another system.

Evan Koblentz, director
Vintage Computer Federation
A 501(c)3 educational non-profit
http://www.vcfed.org

Or if you can't locate a book that pertains to the platinum (perhaps no one wrote one)
you may find documentation of a definitive list of the differences between a II and a platinum
explained so you can spot the things the book you have talks about that won't work or work differently on the platinum.
I doubt there are too many more things you will run across that will trip you up.

Are you not going to use an Apple II emulator to start with?