Memory map
Page Byte Address Description
97 151 24983
Routine at 24983
97 153 24985
Routine at 24985
97 167 24999
Data block at 24999
97 168 25000
Font Data
100 168 25768
Status bar 'Chronos' logo 144x32 pixels, or 18x32 bytes
102 232 26344
First run
103 37 26405
MUSIC_SCREEN
103 81 26449
Menu Screen text
104 168 26792
Routine at 26790
105 0 26880
Main Menu keyboard loop
105 36 26916
MAIN_MENU_HIGHSCORE_SELECTED
105 69 26949
Routine at 26949
105 72 26952
'Press a key.'
105 91 26971
MAIN_MENU_STARTGAME_SELECTED
105 135 27015
MAIN_MENU_CONTROLMETHOD_SELECTED
105 146 27026
MAIN_MENU_MEGALASER_SELECTED
105 162 27042
MAIN_MENU_SELECT_SOUND
105 176 27056
Process string of text
105 199 27079
Play title music
105 224 27104
Routine at 27104
105 237 27117
Routine at 27117
106 20 27156
Draw character
106 87 27223
Routine at 27223
106 174 27310
FADE_AND_CLEAR_SCREEN
106 224 27360
WAIT_FOR_ANY_KEY
106 232 27368
COLOUR_STATUS_AREA
107 9 27401
Message at 27401
107 15 27407
Data block at 27407
107 18 27410
Message at 27410
107 23 27415
Data block at 27415
107 24 27416
DRAW_PLAYER_SHIP_STATUS_BAR
107 45 27437
DRAW_STATUS_BAR_LOGO
107 77 27469
DRAW_SCORE
107 163 27555
Routine at 27555
108 15 27663
HIGHSCORE_ENTRY
108 32 27680
HIGHSCORE_ENTRY
108 115 27763
Routine at 27763
108 130 27778
Routine at 27778
108 216 27864
Routine at 27864
108 240 27888
Routine at 27888
109 28 27932
COLOUR_HIGHSCORES
109 60 27964
Data block at 27964
109 82 27986
DISPLAY_ALL_HIGHSCORES
109 101 28005
FETCH_HIGHSCORE_NAMES_FOR_DISPLAY
109 127 28031
Current highscore name
109 146 28050
Do something with the highscore data
109 199 28103
Data block at 28103
109 203 28107
Megalaser Status
109 204 28108
HIGHSCORE_TABLE
111 172 28588
High Score Entries To Look For
112 33 28705
High Score Entry Responses
112 203 28875
Data block at 28875
112 228 28900
Title music player & data
122 145 31377
Big Boss GFX
126 66 32322
Eyes of Chronos GFX
127 200 32712
Left side of Chronos's face
128 0 32768
Tile GFX
143 224 36832
TILE_MAP_PRECURSOR
144 0 36864
TILE_MAP
198 234 50922
Data block at 50922
199 150 51094
Message at 51094
199 154 51098
Data block at 51098
199 159 51103
Message at 51103
199 162 51106
Data block at 51106
199 164 51108
Message at 51108
199 168 51112
Data block at 51112
199 173 51117
Message at 51117
199 176 51120
Data block at 51120
199 178 51122
Message at 51122
199 182 51126
Data block at 51126
199 187 51131
Message at 51131
199 190 51134
Data block at 51134
199 192 51136
Message at 51136
199 196 51140
Data block at 51140
200 2 51202
Message at 51202
200 58 51258
Data block at 51258
200 114 51314
Data block at 51314
200 170 51370
Message at 51370
200 174 51374
Data block at 51374
200 232 51432
Message at 51432
200 236 51436
Data block at 51436
201 26 51482
Message at 51482
201 30 51486
Data block at 51486
201 86 51542
Message at 51542
201 90 51546
Data block at 51546
201 194 51650
Message at 51650
201 198 51654
Data block at 51654
202 22 51734
Bonus pickup GFX
204 110 52334
Player GFX
204 238 52462
Yinyang GFX
205 238 52718
Domino GFX
206 174 52910
Square GFX
207 46 53038
Cube GFX
207 174 53166
Tiddlywink GFX
208 46 53294
Rocketplane GFX
208 78 53326
Ball GFX
208 110 53358
Routine at 53358
208 130 53378
Data block at 53378
208 132 53380
PLAY_GAME
209 22 53526
Check enemy-player collision
211 106 54122
Routine at 54122
211 133 54149
Routine at 54149
211 157 54173
Check enemy collisions
211 187 54203
Check Enemy-Bullet collision
212 22 54294
PREPARE_AND_DRAW_ENEMIES
212 46 54318
PREPARE_TO_DRAW_ENEMY
212 141 54413
Routine at 54413
212 151 54423
Routine at 54423
213 63 54591
Routine at 54591
214 201 54985
Routine at 54985
214 231 55015
Routine at 55015
215 39 55079
Routine at 55079
215 188 55228
Routine at 55228
216 67 55363
Routine at 55363
216 100 55396
Routine at 55396
216 139 55435
Data block at 55435
216 142 55438
Routine at 55438
216 196 55492
Routine at 55492
217 101 55653
Routine at 55653
217 178 55730
Routine at 55730
218 137 55945
Routine at 55945
219 32 56096
Routine at 56096
219 53 56117
Routine at 56117
219 130 56194
Routine at 56194
219 172 56236
Routine at 56236
219 186 56250
Routine at 56250
219 204 56268
Routine at 56268
219 216 56280
Routine at 56280
219 236 56300
Routine at 56300
220 22 56342
Routine at 56342
220 56 56376
Routine at 56376
220 99 56419
Routine at 56419
220 123 56443
Routine at 56443
221 6 56582
Check all bullets for collisions with landscape
221 30 56606
Check bullet collision with landscape
221 89 56665
Routine at 56665
221 228 56804
Routine at 56804
221 252 56828
Routine at 56828
222 33 56865
GET_PLAYER_INPUT
223 10 57098
PLAYER_MOVEMENT
223 76 57164
GET_PLAYER_FIRING_POSITION
223 119 57207
DRAW_PLAYER
223 202 57290
Routine at 57290
224 50 57394
Routine at 57394
224 197 57541
COLOUR_GAMEPLAY_AREA
225 25 57625
Routine at 57625
225 201 57801
Move all upward firing bullets
225 220 57820
Move upward firing bullet
226 30 57886
Routine at 57886
226 57 57913
Routine at 57913
226 122 57978
Draw all upward-firing bullets
226 141 57997
Draw an upward-firing bullet
226 194 58050
Routine at 58050
227 123 58235
Routine at 58235
227 142 58254
Routine at 58254
227 207 58319
Routine at 58319
227 226 58338
Routine at 58338
228 15 58383
Delay
228 24 58392
Routine at 58392
229 34 58658
DRAW_TILES
229 111 58735
COPY_BUFFER_TO_SCREEN
229 239 58863
Routine at 58863
230 13 58893
SETUP_GAME
231 38 59174
Congraturations text
232 200 59592
Data block at 59592
233 1 59649
Player X Coordinate
233 2 59650
Player Y Coordinate
233 3 59651
Player Input Data
233 4 59652
Data block at 59652
233 5 59653
Data block at 59653
233 6 59654
Data block at 59654
233 7 59655
Data block at 59655
233 8 59656
Data block at 59656
233 9 59657
Data block at 59657
233 10 59658
Data block at 59658
233 11 59659
Data block at 59659
233 12 59660
Data block at 59660
233 13 59661
Data block at 59661
233 14 59662
SP_STORAGE
233 16 59664
CONTROL_METHOD
233 17 59665
Data block at 59665
233 18 59666
Data block at 59665
233 32 59680
Address of end game text
233 34 59682
Data block at 59682
233 135 59783
TILE_MAP_ADDR
233 137 59785
Data block at 59785
233 138 59786
Data block at 59785
233 139 59787
SP_STORAGE_2
233 141 59789
Data block at 59789
233 159 59807
Message at 59807
233 174 59822
Data block at 59822"
233 175 59823
Message at 59823
233 190 59838
Data block at 59838
233 191 59839
Message at 59839
233 205 59853
Data block at 59853
234 28 59932
Message at 59932
234 77 59981
Data block at 59981
234 141 60045
ENEMY_DATA
234 153 60057
Message at 60057
234 160 60064
Data block at 60064
234 177 60081
Upward firing bullets
234 189 60093
Player bullets
234 237 60141
Data block at 60141
235 69 60229
Visible tile map
235 189 60349
Data block at 60349
235 227 60387
SCREEN_BUFFER
235 228 60388
Temporary Music Data Temporary High Score Tables
250 0 64000
ENTRY POINT
250 127 64127
Data block at 64127
250 152 64152
Routine at 64152
250 168 64168
Data block at 64168
251 228 64484
Title music player & data
253 178 64946
Data block at 64948
255 37 65317
Message at 65317
255 41 65321
Data block at 65321
255 89 65369
Message at 65369
255 92 65372
Data block at 65372
255 113 65393
Message at 65393
255 119 65399
Data block at 65399
255 140 65420
Message at 65420
255 143 65423
Data block at 65423
255 148 65428
Message at 65428
255 151 65431
Data block at 65431
255 164 65444
Message at 65444
255 167 65447
Unused
255 169 65449
Message at 65449
255 175 65455
Data block at 65455
255 185 65465
Message at 65465
255 191 65471
Unused
255 193 65473
Message at 65473
255 199 65479
Unused
255 201 65481
Message at 65481
255 207 65487
Data block at 65487
255 217 65497
Message at 65497
255 223 65503
Data block at 65503
255 249 65529
Message at 65529
255 255 65535
Unused