;;; General ;;;
{
Boulder. Falls or rolls when Samus gets near

Enemy ID: $DFBF
Bank: $A6
Enemy projectiles: None

Parameter 0 low: Y proximity
Parameter 1 low: Flag. If set, minimum distance from ground is increased from 2px to 5px
Parameter 1 high: Direction
    0: Right
    1: Left
    2: Left - destroy after bounce
Parameter 2 low: X proximity
Parameter 2 high: Distance to fall, or zero to roll

Properties must have process instructions bit set
}


;;; Behaviour ;;;
{
}


;;; WRAM ;;;
{
$0FA8: Function
{
    $879A: Wait for Samus to get near
    $87ED: Falling
    $8832: Bounce - rising
    $888B: Bounce - falling
    $8942: Rolling
    $89FC: RTS
}
$0FAA: X speed table index * 100h
$0FAC: Y speed table index * 100h
$0FAE: Bounce index
$0FB0: Direction
{
    0: Right
    1: Left
    2: Left - destroy after bounce
}
$7E:7800: X proximity
$7E:7802: Minimum distance from ground
$7E:7804: Previous enemy Y subposition
$7E:7806: Previous enemy Y position
$7E:7808: Spawn X position
$7E:780A: Falling target Y position
$7E:780C: Y proximity
$7E:780E: Type
{
    0: Falling
    1: Rolling
}
}


;;; Enemy population ;;;
{
 ________________________________________ Enemy ID
|      __________________________________ X position
|     |     _____________________________ Y position
|     |    |      _______________________ Initialisation parameter
|     |    |     |      _________________ Properties. 2000h = process instructions, 800h = process whilst off-screen
|     |    |     |     |     ____________ Extra properties
|     |    |     |     |    |      ______ Parameter 1
|     |    |     |     |    |     |     _ Parameter 2
|     |    |     |     |    |     |    |
; Debug
DFBF, 0400,01B5, 0060, 2000,0000, 0101,20A0

; Room $A1AD. Blue Brinstar boulder room
DFBF, 0158,00C0, 0080, 2000,0000, 0200,A050
DFBF, 00F0,00C0, 0080, 2000,0000, 0200,A050
DFBF, 0090,00C0, 0080, 2000,0000, 0200,A050

; Room $B6EE. Norfair rolling boulder shaft
DFBF, 0150,0130, 0050, 2000,0000, 0000,0080
DFBF, 01B8,01D0, 0050, 2800,0000, 0100,0080
DFBF, 0128,0260, 0050, 2800,0000, 0000,0080

; Room $D51E. Snail room quicksand items east
DFBF, 0190,00A0, 0072, 2800,0000, 0200,7204
DFBF, 0150,00C0, 0098, 2800,0000, 0200,A204
DFBF, 00D0,00D0, 00C0, 2800,0000, 0200,A204

; Room $D4EF. Snail room quicksand items west
DFBF, 01D0,0090, 0050, 2800,0000, 0200,6204
DFBF, 00B0,0140, 0080, 2800,0000, 0200,A004
DFBF, 00F0,0160, 00F0, 2800,0000, 0200,F004
DFBF, 0030,0090, 0040, 2800,0000, 0200,5204
}


;;; Enemy header ;;;
{
1000    ; 0: Tile data size
8687    ; 2: Palette
0014    ; 4: Health
0028    ; 6: Damage
0010    ; 8: Width
0010    ; Ah: Height
A6      ; Ch: Bank
00      ; Dh: Hurt AI time
0000    ; Eh: Cry
0000    ; 10h: Boss ID
86F5    ; 12h: Initialisation AI
0001    ; 14h: Number of parts
8793    ; 18h: Main AI
800F    ; 1Ah: Grapple AI
804C    ; 1Ch: Hurt AI
8041    ; 1Eh: Frozen AI
0000    ; 20h: Time is frozen AI
0000    ; 22h: Death animation
0000    ; 28h: Power bomb reaction
0000    ; 2Ah: Sidehopper variant index
8023    ; 30h: Enemy touch
802D    ; 32h: Enemy shot
AB9C00  ; 36h: Tile data
05      ; 39h: Layer
F46A    ; 3Ah: Drop chances ($B4)
EEDC    ; 3Ch: Vulnerabilities ($B4)
E0B5    ; 3Eh: Enemy name ($B4)
}


;;; Enemy vulnerabilities ;;;
{
; Vulnerability format:
;     v = fddddddd
;     If v = FFh:
;         Freeze, no damage
;     Else:
;         d: Damage multiplier * 2
;         f: Does not freeze

00 ; Power
00 ; Wave
00 ; Ice
00 ; Ice + wave
00 ; Spazer
00 ; Spazer + wave
00 ; Spazer + ice
00 ; Spazer + ice + wave
00 ; Plasma
00 ; Plasma + wave
00 ; Plasma + ice
00 ; Plasma + ice + wave
  
00 ; Missile
02 ; Super missile
00 ; Bomb
00 ; Power bomb
00 ; Speed booster
00 ; Shinespark
00 ; Screw attack
00 ; Charged beam
02 ; Pseudo screw attack
02 ; Unused
}


;;; Enemy drop chances ;;;
{
00 ;        Small health
00 ;        Big health
00 ;        Missiles
FF ; 100.0% Nothing
00 ;        Super missiles
00 ;        Power bombs
}