Memory map
Page Byte Address Description
64 0 4000
Screen
91 0 5B00
Font
113 0 7100
Sprites
121 0 7900
Data block
122 0 7A00
Table with sprite addresses
123 0 7B00
Global objects table, 16 bytes per record, max 240 records
138 0 8A00
Objects table, 9 fixed records, 16 bytes each record
138 144 8A90
Objects table, 44 dynamic records, 16 bytes each
141 82 8D52
List of objects to draw, order from far to nearest by Z-coord
142 0 8E00
Table used in object movement procedure, 8 bytes each record
143 0 8F00
Variables
143 121 8F79
Redirects
143 137 8F89
Routine ?? work on table $7B00
143 176 8FB0
Text
144 0 9000
Continuation points, see 9E6C
144 242 90F2
Routine: GAME MODE
146 50 9232
Text
146 206 92CE
Prepare objects for the current Zone
147 148 9394
Draw digit with size of 16x24 pixels into the ZONE indicator
147 183 93B7
Routine
148 35 9423
Initializing objects tables
149 54 9536
Data block at 9536
149 227 95E3
Data block at 95E3
149 239 95EF
Prepare shadow screen, show the screen
150 51 9633
Draw zone border line
150 88 9658
Draw zone land
152 34 9822
Routine
152 90 985A
Sort Objects
153 51 9933
Draw sprite with shift by -2px
153 128 9980
Routine
153 209 99D1
Draw sprite with shift by 4px
154 38 9A26
Draw sprite with shift by 2px
154 112 9A70
Draw sprite with no shift
154 155 9A9B
Redraw changes
155 252 9BFC
Redraw table: 18 records used to draw the shadow screen
156 123 9C7B
Routine
160 59 A03B
Routine
161 11 A10B
Routine
161 27 A11B
Routine
162 112 A270
Routine
162 145 A291
Intro
163 77 A34D
Routine (the most used one)
163 103 A367
Routine
163 211 A3D3
Routine
164 20 A414
Routine
164 80 A450
Check Score
164 128 A480
Data block
165 70 A546
Draw Rough
166 23 A617
Routine
166 119 A677
Routine
166 148 A694
Routine
168 197 A8C5
Routine
168 214 A8D6
Draw zone specials
170 255 AAFF
Spacecraft sprite data
176 222 B0DE
Start point
178 3 B203
Routine: Sound
178 30 B21E
Text
178 218 B2DA
Routine: Prepare shadow screen
179 60 B33C
Routine
179 154 B39A
Routine: Prepare screen
179 216 B3D8
Routine
180 27 B41B
Routine
180 208 B4D0
Show Info Screen
181 45 B52D
Print Small Font Signs on the Info Screen
181 215 B5D7
Small Font
182 44 B62C
Info Screen Small Font Signs
183 181 B7B5
Info Screen Text
184 144 B890
Routine: Print Text
184 240 B8F0
Masks and Sprites
217 0 D900
Shadow screen