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?
Turns out LinApple emulates the enhanced version, same as what's on my //.