Awesome, thanks! Looks like I really should get a copy of that book. I'd already figured out much of what you described there, but some of it is new. If you wouldn't mind scanning the Plus memory map page too, that would be great.

512k Map Normal (OVERLAY=0)
$00 0000 to $02 0000 = RAM (128k)

$02 0000 to $08 0000 = RAM (128k)

$08 0000 to $40 0000 = Repeated RAM images

Click to expand...

I'm guessing that was supposed to be be:

$02 0000 to $08 0000 = RAM (512k)

Click to expand...