Now that I have an emulator for the Apple IIGS that can run fast and have
more memory than I originally had on my old machine, I am going to try
writing my SimCity-type game again. I will probably have to re-write my
double hires routines again, which I don't think will be that hard.

Just in case anyone wants to know, here are the preliminary data:

Over-all memory map:
bank-holds
00-Video image, ProDOS routines, temp var's, etc.
01-Video image, more temp var's and etc.
02-Scrolling routines
03-Bitmap images for each type of tile
04-City growth routines
05-Graphic drawing routines
06-City data

I figure I will have the boot routine go something like this:
boot -----> load ProDOS 8
ProDOS 8 -----> load SC.SYSTEM $2000-$BEFF
with Splash screen from $2000-$3FFF
and main menu, and extra ProDOS routines at $4000-$BEFF
SC.SYSTEM -----> show splash screen while loading
load banks 05, 02, 03, 04 (in that order)
display main menu  - Start New City
    - Load Saved City
    - Exit (ProDOS BYE command)
Start New City - Load "start new city" routine into $6000-$8FFF (should be
enough space)

When I work out the details some more, including getting the data specs for
SimCity Original, I will post it.

Be forewarned, though: if this is ported to a real Apple IIGS, it will
probably run extremely slow! At least my first version did!

Any comments or suggestions are more than gladly welcomed.

Take care, all.

P.S. If you are wondering why I posted this: I just want people to know how
I am doing and to get the motivation with all the other things I am doing to
set enough time aside to finish!