SCREEN:
ln# d012 badl*:  scr:   col:     *$d011=$1b /badline
-----------------------------------------------------
!00  $31   $33   $0400  $d800	stars
 01  $39   $3b   $0428  $d828	stars
 02  $41   $43   $0450  $d850	stars + planet ln.0
 03  $49   $4b   $0478  $d878	stars + planet ln.1
 04  $51   $53   $04a0  $d8a0   stars + planet ln.2 (+blue 'X')
 05  $59   $5b   $04c8  $d8c8	stars + planet ln.3
 06  $61   $63   $04f0  $d8f0   stars + planet ln.4
 07  $69   $6b   $0518  $d918   stars + planet ln.5
 08  $71   $73   $0540  $d940   stars + planet ln.6
 09  $79   $7b   $0568  $d968   stars
!10  $81   $83   $0590  $d990  	text: 'PRESENTS:' (with hires sprite overlay)
 11  $89   $8b   $05b8  $d9b8       <empty>
 12  $91   $93   $05e0  $d9e0   text: 'space organic intro'
 13  $99   $9b   $0608  $da08       <empty>
!14  $a1   $a3   $0630  $da30   2x2 scroll, ln.0
 15  $a9   $ab   $0658  $da58   2x2 scroll, ln.1
 16  $b1   $b3   $0680  $da80       <empty>
!17  $b9   $bb   $06a8  $daa8   logo ln.0
 18  $c1   $c3   $06d0  $dad0   logo ln.1
 19  $c9   $cb   $06f8  $daf8   logo ln.2
 20  $d1   $d3   $0720  $db20   logo ln.3
 21  $d9   $db   $0748  $db48   logo ln.4
 22  $e1   $e3   $0770  $db70  	logo ln.5
 23  $e9   $eb   $0798  $db98       <empty>
 24  $f1   $f3   $07c0  $dbc0       <empty>
Sprites: screen top-left X: #24/$18, Y: #50/$32
---------------------- 
DATA: C: code, G: graphics, D: data, S: sprites, V/P: value/pointer
*******************************************************************
---------------------------------------------------------------------
d $0800 - 0cff   2x2 charset, Char data
d $0d00 - 0dff   2x2 charset, Map  data ($0d00: 1st row, $0d80: 2nd row)
d $0e00 - 0e3f   2x2 chars - length ($01 or $02)
d $0e80 - 0eff   sinus (1-16 movement, 128 positions)
d $0f00 - 0f29    -- ..temp converter from 0f00-0f30 for 2x2charset..
d $0f30 - 0f3f   raster colours behind 2x2 scroll
d $1000 - 1e98   music
d $1ea0 - 1fff    --
d $2000 - 26ff   1x1 charset + hires overlay data
d $2700 - 27ff    --
C $2800 - 2fb0   RESERVED for CODE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
d $2fc0 - 2fe8   1-line text/credits shown after pressing SPACE
d $3000 - 33ff   2x2 scroll text. Special chars: $1f - following char will be the speed. 
                   ...zero is pause for ~4-5 secs. $ff: end
d $3400 - 37e7   screen data (during init, copied to $0400)
s $3800 - 393e   Planet's MC grey sprites (5 pcs: $07f8...: $e0, $e1, $e2, $e3, $e4)
s $3940 - 3bbe   Planet's hires 'X' sprites (animation with 5-5 sprites) ($e5-$ee)
s $3bc0 - 3dbe   Excess logo's MC sprites (8 pcs) ($ef-$f6)
s $3dc0 - 3e7e   'presents:' hires sprite overlay (3 pcs) ($f7, $f8, $f9)
s $3e80 - 3ebe   2x2 scroll's left-most char (1st 8-bit column of sprite) ($fa)
s $3ec0 - 3fbe   2x2 scroll fade-in/out hires sprites (2 left: $fb-fc, 2 right: $fd-fe)
d                sinus data for Planet and stars movement
d $1fc0 - 1fdf   'x' sprites anim position (1-5)

--
Code/Routines:
c $0e40 -        little stars cycling
c $0f60 -        31 NOP+RTS
c $0f80 -        29 NOP+BIT $EA+RTS
c $0fa0 -        space pressed: screen clear + credits + reset
c $1ea0 -        Planet's stars movement logic
c $1f80 -        Planet's 'X' sprite anim logic
c $27a0 -        check music: snare
c $27b0 -        in case of snare: colour roll in stars next to the Excess logo #1 -> JMP $0e40
c $2800 -        start
c $2950 -        Excess stars colour set #2
c $29a0 -        Excess stars colour set #1
c $2a00 -        main routine / raster interrupts
c $2b00 -        2x2 scroll routine: main logic
c $2c00 -        set Planet sprite data
c $2ca0 -        Planet X and Y offset set
c $2cd0 -        'presents:' sprite overlay
c $2d20 -        'X' sprites: sprite set at $07fd-fe
c $2d40 -        2x2 scroll sprite init
c $2e40 -        Excess logo sprites init
c $2ed0 -        Excess logo: 2 sprites colour change


--
VARIABLES (ZERO PAGE, memory addr):
v $2d             planet - X offset (0-7), added to $C8/$D016
v $2e             planet - y offset (0-7), added to $18/$d011
v $2f             2x2 scroll 8-pixel position
v $30             2x2 scroll pause counter (decreasing to zero)
v $31             2x2 scroll's tile position (1: first char, 2: second char drawn)
v $32             2x2 scroll's tile width    (1: 1-char, 2: 2 chars wide)
v $33 - 34        scroll position (default: $3000)
v $35             2x2 scroll speed (1-7)
v $36             current char
v $37 - 38        16-bit temporary value (e.g.: 2x2 temporary 16-bit value for sprite copy)
v $2afe, 2aff     2x2 scroll left char, 1st row and 2nd row char value (offset on $0d00)
v $2ca1           Planet: sinus position, X
v $2cb3           Planet: sinus position, Y
v 39              'X' sprite anim position (1-5)
v 3a              Excess logo X offset
v 3b              star animation counter (besides the Planet)

RUNTIME Plan:
-------------
$2a00 - all main code sections, separated by raster interrupts.
Nr#:  $D012:  $2a00,X:  $D018:  $D016:  $D011: ($D0xx value only, if change is made)
 00    2e        00      $18     $c8+x  $18+y   
          .0: init and set D016 and D011 (X + Y movement of the Planet, 7 sprites)
              X offset: 2d, Y offset: 2e
          .1: init sprites and set coordinates (Planet)
          .2: 2x2 scroll logic + 1 sprite (left-most/41th char, copied from $0630 and $0658)
          .3: 5 stars fade our/in in 'Excess' logo

 01    7e        30              $c8      $1b
          .0: init and set D016 and D011 (static, $c8 and $1b)
          .1: 3-sprite 'presents:' hires sprite overlay init/set
          .2: play music (JSR $1003)

 02    9e        52       $12       $c8+x
          .0: set D018, D016  (D016: c8 + $2f)
          .1: init and set coordinates for the 2x2 scroll's sprites (5 pcs)
          .2: rasterbars from $a1 (16 pixel rows)
          .3: 'X' sprite anim position

 03    b6        77       $18       $c8   
          .0: init and set d018 and D016
          .1: init sprites and set coordinates (Excess logo, 8 sprites)
 
 04    d1        99
          .0: right before $D012=#$d6 set sprites MC1 and MC2 to $0a and $05 (for sprites #06 and #07)
          .1: star animation logic
          .2: colour cycling for text 'name of the game' ($05e0 row)
          .3: Planet's movement logic / calculate coordinates
          .4: 
 05    fa        b7                  $13
          .0: set $D011 = #$13
          .1: lda $adad

 06    00                            $1b
          .0: set $d011 = #$1b
          .0:  lda dc01 ; and #10 ; beq *reset



colours:
0 - @ - black
1 - a - white
2 - b - red
3 - c - cyan
4 - d - purple
5 - e - green
6 - f - blue
7 - g - yellow
8 - h - orange
9 - i - brown
a - j - light red
b - k - dark grey
c - l - grey
d - m - light green
e - n - light blue
f - o - light grey

Sprite parameters - Planet: ( note: screen top-left X: #24/$18, Y: #50/$32 )
 - row #02 (3rd):     $07fx      X-coord.: Y-coordinate:
    - MC sprite #0:    8-$e0       $a0         $42  (left-upper)
    - MC sprite #1:    9-$e1       $b8         $42  (upper-mid)
    - MC sprite #2:    a-$e2       $a0         $5a  (mid-left) 
    - MC sprite #3:    b-$e3       $a0         $6f  (bottom-left)
    - MC sprite #4:    c-$e4       $de         $5a  (right part, -2 pixel aligned)
    - Hires sprite #5: d-$e5+x1*2  $b8         $52  (cyan/$03 hires sprite)
    - Hires sprite #6: e-$e6+x2*2  $b8         $52  (blue/$0e hires sprite)
 - $d010:  $00  (X coordinate offset/ 256)
 - $d015:  $7f  (%01111111 -  1: sprite enabled)
 - $d017/d01d:  $00 (x/y double)
 - $d01b: $7f  (sprite priority register, 1 = Sprite #x is behind screen contents)
 - $d01c: $1f  (%00011111 - MC or hires, 0 = Sprite #x is single color; 1 = Sprite #x is multicolor)
 - $d025: $0f  ( sprite MC colour 1 / %01 )
 - $d026: $0c  ( sprite MC colour 2 / %11 )
 - $d027-d02b: $01 ( white )
 - $d02c: $03  ( cyan )
 - $d02d: $0e  ( blue )

Sprite parameters - 'presents:'
 - row #10:           $07fx    X-coord.: Y-coordinate:
  - hires sprite #0:   8-$f7      $98         $82
  - hires sprite #1:   9-$f8      $b0         $82
  - hires sprite #2:   a-$f9      $c8         $82
 - $d010:  $00  (X coordinate offset/ 256)
 - $d015:  $07  (%00000111 -  1: sprite enabled)
 - $d017/d01d:  $00 (x/y double)
 - $d01b: $00  (sprite priority register, 1 = Sprite #x is behind screen contents)
 - $d01c: $00  (%00000000 - MC or hires, 0 = Sprite #x is single color; 1 = Sprite #x is multicolor)
 - $d027-d029: $0b ( dark grey )

Sprite parameters - 2x2 scroller (+1 char in left sprite column, 2-2 fade-in/out hires sprites)
 - row #14:           $07f[x]    X-coord.: Y-coordinate:(X offset: $2f)
  - hires sprite #0:   8-fa       $18+x       $a2
  - hires sprite #1:   9-fb        $18        $a2
  - hires sprite #2:   a-fc        $18        $a2
  - hires sprite #3:   b-fd        $40        $a2
  - hires sprite #4:   c-fe        $40        $a2
 - $d010:  $18  (X coordinate offset/ 256: %00011000)
 - $d015:  $1f  (%00011111 -  1: sprite enabled)
 - $d017/d01d:  $00 (x/y double)
 - $d01b: $1e  (sprite priority register, 1 = Sprite #x is behind screen contents)
 - $d01c: $00  (%00011111 - MC or hires, 0 = Sprite #x is single color; 1 = Sprite #x is multicolor)
 - $d027: $00 ( black - reason: charset used here is inverted, rasters/$d021 colour will be the colour )
 - $d028: $0b
 - $d029: $0c
 - $d02a: $0b
 - $d02b: $0c

Sprite parameters - Excess logo: ($07f8-ff: $ef-$f6)
 - row #02 (3rd):    X-coord.: Y-coordinate:
    - MC sprite #0:    $70          $c2
    - MC sprite #1:    $88          $c2
    - MC sprite #2:    $a0          $c2
    - MC sprite #3:    $b8          $c2
    - MC sprite #4:    $d0          $c2
    - MC sprite #5:    $e8          $c2
    - MC sprite #6:    $a8          $d7 ($d025 = $0a / red!)
    - MC sprite #7:    $d8          $d7 ($d025 = $0a / red!)

 - $d010:  $00  (X coordinate offset/ 256)
 - $d015:  $ff  (%11111111 -  1: sprite enabled)
 - $d017/d01d:  $00 (x/y double)
 - $d01b: $ff  (sprite priority register, 1 = Sprite #x is behind screen contents)
 - $d01c: $ff  (%11111111 - MC or hires, 0 = Sprite #x is single color; 1 = Sprite #x is multicolor)
 - $d025: $0f  ( sprite MC colour 1 / %01 )
 - $d026: $0c  ( sprite MC colour 2 / %11 )
 - $d027-d02c: $01 ( white )
 - $d02d-d02e: $07  ( yellow )
  
Music 3rd channel intrument values> @ $17c7:
   code:        colours:
 - $c7:            9   5   d   f   b   c   3  1
 - $a8: bass       1   3   c   b   f   d   5  9
 - $eb: snare      >animated<
 - $c4: