Hello, all,

Below is the boot framework for SimCityGS. The game is slowly but surely
making its way to completion.

As always, any comments, questions or suggestions are more than welcome!

Take care, all.

----- Cut Here -----
Boot Section of SimCity

Here is some code and pseudocode for the boot section of SimCity:

SC.SYSTEM  A$2000 L$?

2000:4C 00 40      ENTRY      JMP  ENTRY2      ;JUMP OVER HIRES SPLASH
SCREEN

2003.3FFF - Hires Splash Screen

4000:A9 FF        ENTRY2    LDA  #$FF        ;CLEAN UP THE HIRES IMAGE
4002:8D 00 20                STA  $2000        ;BY ERASING THE JMP 4005:8D
01 20                STA  $2001        ; AT LOCATIONS
4008:8D 02 20                STA  $2002        ;  2000.2002
400B:2C 52 C0                BIT  FULL        ;SHOW THE HIRES SCREEN 400E:2C
57 C0                BIT  HIRES        ;WHILE WE DO OUR INITIAL 4011:2C 50
C0                BIT  GRAPHIC      ;PROGRAM LOADING

* NOW THAT SPLASH SCREEN IS DONE, WE HAVE TO LOAD THE PROGRAM

4014:EA EA EA EA              NOP  *4          ;PUT A LITTLE SPACE IN HERE,
4018:EA EA EA EA              NOP  *4          ;JUST IN CASE WE NEED IT
401C:EA EA EA EA              NOP  *4          ;AT A LATER DATE

* STANDARD NAMES FOR PROGRAM PIECES WILL BE:
*    SC.SYSTEM            Loader program and ProDOS interface
*    MONTH.PASS          Figures what happens to each square each month *
DHIRES              All the double-hires routines, incl. text and dialog box
*    SQUARE.DATA          Bitmaps for each square
*    SCROLL              Routines to scroll up, right, down and left

4020: Check if this is really an Apple IIGS, If not, then display error
message
4030: Using hard-coded names for files, load each one into memory
DHIRES goes into Bank 05 - First
      MONTH.PASS goes into Bank 04 - Second
      SCROLL goes into Bank 02 - Third
      SQUARE.DATA goes into Bank 03 - Last

      Load them this way:
        Load first piece into 8000.9FFF (Main Memory - can be bigger)
Use MVN to move it to final memory bank
        Load second piece over first at 8000.9FFF (Main memory - can be
bigger)
        Use MVN to move it to final memory bank
        Continue until done
      Load next file exactly the same way

4800: Now that files loaded, switch to double hires and display main menu
MAIN MENU:  START NEW CITY
                  LOAD SAVED CITY
                  EXIT

      If "LOAD SAVED CITY" go to loader
      If "EXIT" do ProDOS "QUIT" call
      Else

* Start new city:
*  Original version of program will have set map to start with. *  If, When
this is done, someone wants to add a terrain generation routine *  Great!
*
* Otherwise, we need to put these data into our initial map.
* We could add default data to the the end of (probably) the SQUARE.DATA
file
* then we would just have to load that into bank 06

Some excess notes:

I could have fleshed this out more, but I'm still looking for the MLI CALL
tables. If anyone has these, or knows where I can find them on the internet,
please post a note in this newsgroup.

I have yet to post the SimCity city data particulars, mainly because the
book I had detailing these is sitting over at my sister's house. As soon as
I can get over there, I will type them in and post them.

I am also working on mathematics routines so I can figure out totals, taxes,
etc. When they are finished I will post the source code on this newsgroup.

Whenever we go from the program to ProDOS, we need to switch to emulation
mode, then when we go back to the program, we need native mode. I know MVN
needs native mode to work correctly.

I should include code for mouse and keyboard control, using the keys in the
original SimCity.