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Update_SPRATR.s
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Update_SPRATR.s
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; Screen sprites budget:
; =====================
; qty range
; 4 0-3 Player plane (was 6, then improved to only 4 by using an offset on sprites overlapping)
; 6 4-9 Player shots (3x 16x16 sprites for simple shots; 3x 32x16 for double shots)
; 14 10-23 Enemies (*) (**)
; 7 24-30 Enemy shots (7x 16x16 single sprites) or player bomb sprites (14 sprites alternating 7 per frame)(***)
; 1 31 Ground target (sprite used only to blink when shot),
; this is shared by all ground targets, as only one is being shot at a time (****)
; (*)
; SMALL_ENEMIES: 7x two 16x16 or-color sprites enemies (18x24 total size aprox)
; BIG_ENEMIES: 2x 7 16x16 sprites (32x32 total size)
; BOSS: 1x 14 16x16 sprites (80x64 total size)
; (**)
; 21 sprites for enemy shots (range 10-30), for some bosses made of static background bitmap
; (***)
; player bomb sprites
; odd frames:
; X X X X X X X
; even frames:
; X X X X X X X
; horizontal spacing between sprites: 18 pixels (18 x 14 = 252)
; (****) also used for "1000 points" sprite
PLAYER_SPR_PAT_0_NUMBER: equ 0 * 4
PLAYER_SPR_PAT_1_NUMBER: equ 1 * 4
PLAYER_SPR_PAT_2_NUMBER: equ 2 * 4
PLAYER_SPR_PAT_3_NUMBER: equ 3 * 4
PLAYER_SHOT_SPR_PAT_NUMBER: equ 4 * 4
ENEMY_FRAME_0_SPR_PAT_0_NUMBER: equ 5 * 4 ; 5 and 6
;ENEMY_FRAME_0_SPR_PAT_1_NUMBER: equ 6 * 4
ENEMY_FRAME_1_SPR_PAT_0_NUMBER: equ 12 * 4 ; 12 and 13
ENEMY_FRAME_2_SPR_PAT_0_NUMBER: equ 14 * 4
ENEMY_FRAME_3_SPR_PAT_0_NUMBER: equ 16 * 4
ENEMY_FRAME_4_SPR_PAT_0_NUMBER: equ 18 * 4
ENEMY_FRAME_5_SPR_PAT_0_NUMBER: equ 20 * 4 ; 20 and 21
; sprite patterns # 41 to 56 are available to Big Enemies (7x sprites, 32x32)
BIG_ENEMY_SPR_PAT_0_NUMBER: equ 41 * 4
ENEMY_PLANE_TURNING_FRAME_0_SPR_PAT_0_NUMBER: equ 41 * 4 ; 41 and 42
ENEMY_PLANE_TURNING_FRAME_1_SPR_PAT_0_NUMBER: equ 43 * 4
ENEMY_PLANE_TURNING_FRAME_2_SPR_PAT_0_NUMBER: equ 45 * 4
ENEMY_PLANE_TURNING_FRAME_3_SPR_PAT_0_NUMBER: equ 47 * 4
ENEMY_PLANE_TURNING_FRAME_4_SPR_PAT_0_NUMBER: equ 49 * 4
ENEMY_PLANE_TURNING_FRAME_5_SPR_PAT_0_NUMBER: equ 51 * 4
ENEMY_PLANE_TURNING_FRAME_6_SPR_PAT_0_NUMBER: equ 53 * 4
ENEMY_PLANE_TURNING_FRAME_7_SPR_PAT_0_NUMBER: equ 55 * 4 ; 55 and 56
EXPLOSION_SPR_PAT_0_NUMBER: equ 7 * 4
EXPLOSION_SPR_PAT_1_NUMBER: equ 8 * 4
EXPLOSION_SPR_PAT_2_NUMBER: equ 9 * 4
ENEMY_SHOT_SPR_PAT_0_NUMBER: equ 10 * 4
ENEMY_SHOT_SPR_PAT_1_NUMBER: equ 11 * 4
PLAYER_BOMB_SPR_PAT_NUMBER: equ ENEMY_SHOT_SPR_PAT_0_NUMBER
; sprite patterns # 12 to 21 are Enemy Planes
PLAYER_LEFT_FRAME_0_TOP_SPR_PAT_0_NUMBER: equ 22 * 4 ; 22 to 25
; PLAYER_LEFT_FRAME_0_TOP_SPR_PAT_1_NUMBER: equ 23 * 4
; PLAYER_LEFT_FRAME_0_BOTTOM_SPR_PAT_0_NUMBER: equ 24 * 4
; PLAYER_LEFT_FRAME_0_BOTTOM_SPR_PAT_1_NUMBER: equ 25 * 4
PLAYER_LEFT_FRAME_1_TOP_SPR_PAT_0_NUMBER: equ 26 * 4 ; 26 to 29
; PLAYER_LEFT_FRAME_1_TOP_SPR_PAT_1_NUMBER: equ 27 * 4
; PLAYER_LEFT_FRAME_1_BOTTOM_SPR_PAT_0_NUMBER: equ 28 * 4
; PLAYER_LEFT_FRAME_1_BOTTOM_SPR_PAT_1_NUMBER: equ 29 * 4
PLAYER_RIGHT_FRAME_0_TOP_SPR_PAT_0_NUMBER: equ 30 * 4 ; 30 to 33
PLAYER_RIGHT_FRAME_1_TOP_SPR_PAT_0_NUMBER: equ 34 * 4 ; 34 to 37
ITEM_P_SPR_PAT_0_NUMBER: equ 38 * 4 ; 38 to 39 ; all frames of item P will be put here (each frame uses 2 sprites)
GROUND_TARGET_PAT_0_NUMBER: equ 40 * 4
; sprites 41 to 56: Enemy plane turning
POINTS_1000_PAT_NUMBER: equ 57 * 4
ITEM_BOMB_SPR_PAT_0_NUMBER: equ 58 * 4 ; 58 to 59 ; all frames of item bomb will be put here (each frame uses 2 sprites)
; -------------- NEXT AVAILABLE: 60 --------------------
EMPTY_SPR_PAT_NUMBER: equ 63 * 4
Update_SPRATR:
;ld hl, SPRATR_Buffer
; set up base VRAM addr to SPRATR table
ld a, 0000 0001 b
ld hl, SPRATR
call SetVdp_Write
ld c, PORT_0
ld d, 0 ; value for 4th byte of each sprite
ld e, 216 ; Y value that hides the sprite and all sprites after
; show player plane or explosion
; if (Player_Status >= 2 && Player_Status <= 20) playerPlaneExplosion
ld a, (Player_Status)
cp 2
jp c, .playerPlaneNormal ; if (A < 2) playerPlaneNormal
cp 20 + 1
jp c, .playerPlaneExplosion ; if (A < 20) playerPlaneExplosion
; jp .playerPlaneNormal ; else playerPlaneNormal
; ================================== PLAYER PLANE ALIVE/RESPAWN ===================================
.playerPlaneNormal:
; Sprite # 0
ld a, (Player_Y)
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
; use OUT's directly, instead of a buffer (saves 18 + 8 + 7 - 12 = 21 cycles per byte, 128 * 21 = 2688 cycles total)
; saves:
; outi (18 cycles) on UpdateBuffer routine
; ld (hl), a (8 cycles) here
; inc hl (7 cycles) here
; add:
; out (PORT_0), a (12 cycles)
; CAUTION: on V9938/58 sequential OUT's must be at least 15 cycles apart
; NOP is 5 cycles, 5 NOP's = 25 per sprite ==> 32 x 25 = 800 cycles wasted :(
nop
ld a, (Player_X)
out (PORT_0), a
nop
ld a, (Player_SpritePatternNumber)
out (PORT_0), a
; TODO: these 3 NOP's can be changed to
; ld a, (Player_Y)
; cp e
; (code of next sprite). Worse for legibilty, better for performance
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 1
ld a, (Player_Y)
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Player_X)
out (PORT_0), a
ld a, (Player_SpritePatternNumber)
add 4
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 2
ld a, (Player_Y)
add a, 16
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Player_X)
out (PORT_0), a
ld a, (Player_SpritePatternNumber)
add 8
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 3
ld a, (Player_Y)
add a, 16
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (Player_Spr3_Offset_X)
ld b, a
ld a, (Player_X)
add a, b ; x offset
out (PORT_0), a
ld a, (Player_SpritePatternNumber)
add 12
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
jp .continue_1
.playerPlaneExplosion:
; ================================== PLAYER PLANE EXPLOSION ===================================
; Sprite # 0
ld a, (Player_Y)
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Player_X)
out (PORT_0), a
nop
ld a, (Player_SpritePatternNumber)
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 1
ld a, (Player_Y)
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (Player_X)
add 16
out (PORT_0), a
nop
ld a, (Player_SpritePatternNumber)
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 2
ld a, (Player_Y)
add 16
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (Player_X)
nop
out (PORT_0), a
nop
ld a, (Player_SpritePatternNumber)
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 3
ld a, (Player_Y)
add 16
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (Player_X)
add 16
out (PORT_0), a
nop
ld a, (Player_SpritePatternNumber)
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
.continue_1:
; ================================== PLAYER SHOTS ===================================
; --------------------------------------------------------------------------------
; Sprite # 4
ld a, (PlayerShot_0_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (PlayerShot_0_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (PlayerShot_0_Struct + 4) ; Pattern number 0
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 5
ld a, (PlayerShot_0_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (PlayerShot_0_Struct + 1) ; X
add 16
out (PORT_0), a
nop
ld a, (PlayerShot_0_Struct + 5) ; Pattern number 1
out (PORT_0), a
nop
nop
nop
out (c), d
; --------------------------------------------------------------------------------
; Sprite # 6
ld a, (PlayerShot_1_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (PlayerShot_1_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (PlayerShot_1_Struct + 4) ; Pattern number 0
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 7
ld a, (PlayerShot_1_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (PlayerShot_1_Struct + 1) ; X
add 16
out (PORT_0), a
nop
ld a, (PlayerShot_1_Struct + 5) ; Pattern number 1
out (PORT_0), a
nop
nop
nop
out (c), d
; --------------------------------------------------------------------------------
; Sprite # 8
ld a, (PlayerShot_2_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (PlayerShot_2_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (PlayerShot_2_Struct + 4) ; Pattern number 0
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 9
ld a, (PlayerShot_2_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
ld a, (PlayerShot_2_Struct + 1) ; X
add 16
out (PORT_0), a
nop
ld a, (PlayerShot_2_Struct + 5) ; Pattern number 1
out (PORT_0), a
nop
nop
nop
out (c), d
; ================================== SMALL ENEMIES ===================================
; if (EnemyMode == ENEMY_MODE_SMALL_ENEMIES) updateSprites_SmallEnemies
; elseif (EnemyMode == ENEMY_MODE_BIG_ENEMIES) updateSprites_BigEnemies
; elseif (EnemyMode == ENEMY_MODE_BOSS) updateSprites_Boss
ld a, (EnemyMode)
cp ENEMY_MODE_BIG_ENEMIES
jp z, .updateSprites_BigEnemies
; ------------------------------------------------------------------------------
; Sprite # 10
ld a, (Enemy_0_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_0_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_0_Struct + 4) ; Pattern 0
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 11
ld a, (Enemy_0_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_0_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_0_Struct + 5) ; Pattern 1
out (PORT_0), a
nop
nop
nop
out (c), d
; ------------------------------------------------------------------------------
; Sprite # 12
ld a, (Enemy_1_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_1_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_1_Struct + 4) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 13
ld a, (Enemy_1_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_1_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_1_Struct + 5) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ------------------------------------------------------------------------------
; Sprite # 14
ld a, (Enemy_2_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_2_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_2_Struct + 4) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 15
ld a, (Enemy_2_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_2_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_2_Struct + 5) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ------------------------------------------------------------------------------
; Sprite # 16
ld a, (Enemy_3_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_3_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_3_Struct + 4) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 17
ld a, (Enemy_3_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_3_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_3_Struct + 5) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ------------------------------------------------------------------------------
; Sprite # 18
ld a, (Enemy_4_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_4_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_4_Struct + 4) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 19
ld a, (Enemy_4_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_4_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_4_Struct + 5) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ------------------------------------------------------------------------------
; Sprite # 20
ld a, (Enemy_5_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_5_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_5_Struct + 4) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 21
ld a, (Enemy_5_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_5_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_5_Struct + 5) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ------------------------------------------------------------------------------
; Sprite # 22
ld a, (Enemy_6_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_6_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (Enemy_6_Struct + 4) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 23
ld a, (Enemy_6_Struct + 11) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (Enemy_6_Struct + 10) ; X1
out (PORT_0), a
nop
ld a, (Enemy_6_Struct + 5) ; Pattern
out (PORT_0), a
nop
nop
nop
out (c), d
jp .cont_3
; ================================== BIG ENEMIES ===============================
; ------------------------------------------------------------------------------
.updateSprites_BigEnemies:
; ---- Big Enemy #0
; Sprite # 10
ld a, (BigEnemy_0_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 20) ; Pattern 0
; ld a, 255 ; just to wait 8 cycles
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER ; Pattern 0
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 11
ld a, (BigEnemy_0_Struct + 9) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 8) ; X1
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 21) ; Pattern 1
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER
; add 1 * 4 ; Pattern 1
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 12
ld a, (BigEnemy_0_Struct + 11) ; Y2
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 10) ; X2
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 22) ; Pattern 2
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER
; add 2 * 4 ; Pattern 2
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 13
ld a, (BigEnemy_0_Struct + 13) ; Y3
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 12) ; X3
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 23) ; Pattern 3
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER
; add 3 * 4 ; Pattern 3
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 14
ld a, (BigEnemy_0_Struct + 15) ; Y4
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 14) ; X4
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 24) ; Pattern 4
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER
; add 4 * 4 ; Pattern 4
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 15
ld a, (BigEnemy_0_Struct + 17) ; Y5
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 16) ; X5
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 25) ; Pattern 5
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER
; add 5 * 4 ; Pattern 5
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 16
ld a, (BigEnemy_0_Struct + 19) ; Y6
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 18) ; X6
out (PORT_0), a
nop
ld a, (BigEnemy_0_Struct + 26) ; Pattern 6
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER
; add 6 * 4 ; Pattern 6
out (PORT_0), a
nop
nop
nop
out (c), d
; ---- Big Enemy #1
; Sprite # 17
ld a, (BigEnemy_1_Struct + 2) ; Y
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_1_Struct + 1) ; X
out (PORT_0), a
nop
ld a, (BigEnemy_1_Struct + 20) ; Pattern 0
; ld a, 255 ; just to wait 8 cycles
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER ; Pattern 0
out (PORT_0), a
nop
nop
nop
out (c), d
; ----------------------------------------
; Sprite # 18
ld a, (BigEnemy_1_Struct + 9) ; Y1
cp e ; if (Y == 216) Y++
jp nz, $+4 ; jp nz is 3 bytes long, inc a is 1 byte long
inc a
out (PORT_0), a
nop
ld a, (BigEnemy_1_Struct + 8) ; X1
out (PORT_0), a
nop
ld a, (BigEnemy_1_Struct + 21) ; Pattern 1
; ld a, BIG_ENEMY_SPR_PAT_0_NUMBER