; Data section - Not initialized variables ($CD00 - $CDFF)
; ----------------------------------------------------------------------
; Number of interrupt
; Used as counter to be decremented to do some things less frequently
irqn:
    BYTE

; Direction of the snake (2,4,6,8 as down,left,right,up)
; 5 means `pause`
direction:
    BYTE

; Snake head coordinates in video memory
snakeX:
    BYTE
snakeY:
    BYTE

; Parameters for calcTileMem
calcTileX:
    BYTE
calcTileY:
    BYTE

; List start and length
listStart:
    BYTE
length:
    BYTE

; Random value
random:
    BYTE

; Status
status:
    BYTE