Game status buffer
Address Length Description
5E00 1
Game Options
5E01 3
Game status buffer entry at 5E01
5E04 2
Font Pointer
Holds a pointer to the currently used font data.
5E06 3
High Score
3-byte representation of the score.
5E09 23
Game status buffer entry at 5E09
5E20 21
Game status buffer entry at 5E20
5E35 3
Game status buffer entry at 5E35
5E38 8
Game status buffer entry at 5E38
5E40 2
Game status buffer entry at 5E40
5E42 14
Game status buffer entry at 5E42
5E50 2
Game status buffer entry at 5E50
5E52 1
Frame Updated
Has the frame been updated?
00 No
01 Yes
5E53 3
Last Frame
Holds a copy of the last FRAMES counter.
5E56 1
Game status buffer entry at 5E56
5E57 1
Game status buffer entry at 5E57
5E58 1
Game status buffer entry at 5E58
5E59 1
Game status buffer entry at 5E59
5E5A 3
Game status buffer entry at 5E5A
5E5D 1
Game status buffer entry at 5E5D
5E5E 1
Game status buffer entry at 5E5E
5E5F 3
1UP Score
3-byte representation of the score.
5E62 3
2UP Score
3-byte representation of the score.
5E65 1
Active Player
Which player is currently active. $5E65
Value Player
00 1UP
FF 2UP
5E66 1
Current menu item colour attribute
5E67 1
Game Delay Timer
At the beginning of each player turn there is a delay to allow the player to be ready for play.
Value Game Mode
80 1UP
FF 2UP
The larger delay for a 2UP game is useful for swapping players controls.
5E68 1
Game status buffer entry at 5E68
5E69 3
Game status buffer entry at 5E69
5E6C 1
Game status buffer entry at 5E6C
5E6D 2
Game status buffer entry at 5E6D
5E6F 2
Game status buffer entry at 5E6F
5E71 2
Number of players?
5E73 1
Game status buffer entry at 5E73
5E74 1
Game status buffer entry at 5E74
5E75 2
Game status buffer entry at 5E75
5E77 1
High Score Position
Used when calculating the players position in the high score table.
5E78 4
Game status buffer entry at 5E78
5E7C 36
Game status buffer entry at 5E7C
5EA0 1
Active Player Level
5EA1 1
Active Player Lives
5EA2 1
Game status buffer entry at 5EA2
5EA3 1
Game status buffer entry at 5EA3
5EA4 1
Inactive Player Level
5EA5 1
Inactive Player Lives
5EA6 1
Game status buffer entry at 5EA6
5EA7 345
Game status buffer entry at 5EA7
6000 96
Laser Beam Parameters
Bytes(n) Variable
608E 2
Fuel Level
61B0 144
Alien States
There are a maximum of 6 aliens on the screen at one time, and those states are stored here in this data block.
Byte State Byte State Byte State
00 TBC 08 TBC 10 TBC
01 TBC 09 TBC 11 TBC
02 TBC 0A TBC 12 TBC
03 TBC 0B TBC 13 TBC
04 TBC 0C TBC 14 TBC
05 TBC 0D TBC 15 TBC
06 TBC 0E TBC 16 TBC
07 TBC 0F TBC 17 TBC