Routines
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64d7: Drop a random coloured collectible item.
Set the sprite to a random colour based on it's ID, which means colour values will be between $41 and $47.
Input
IX Collectible item object.
64d7 ld a,($5dcc) Game timer
64da rrca
64db rrca
64dc and $07
64de jr nz,$64e1 Jump if A is now 1-7
64e0 inc a
64e1 or $40 Make sure colour value is > $40
64e3 ld (ix+$03),a Set the colour to between $41 and $47
64e6 jr $64a4 Display the item sprite
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