diff options
| -rw-r--r-- | engine/overworld/movement.asm | 858 | ||||
| -rwxr-xr-x | main.asm | 860 |
2 files changed, 859 insertions, 859 deletions
diff --git a/engine/overworld/movement.asm b/engine/overworld/movement.asm new file mode 100644 index 00000000..842544a7 --- /dev/null +++ b/engine/overworld/movement.asm @@ -0,0 +1,858 @@ +UpdatePlayerSprite: ; 4e31 (1:4e31) + ld a, [wSpriteStateData2] + and a + jr z, .asm_4e41 + cp $ff + jr z, .asm_4e4a + dec a + ld [wSpriteStateData2], a + jr .asm_4e4a +.asm_4e41 + FuncCoord 8, 9 ; $c45c + ld a, [Coord] + ld [$ff93], a + cp $60 + jr c, .asm_4e50 +.asm_4e4a + ld a, $ff + ld [$c102], a + ret +.asm_4e50 + call Func_4c70 + ld h, $c1 + ld a, [wWalkCounter] ; $cfc5 + and a + jr nz, .asm_4e90 + ld a, [$d528] + bit 2, a + jr z, .asm_4e65 + xor a + jr .asm_4e86 +.asm_4e65 + bit 3, a + jr z, .asm_4e6d + ld a, $4 + jr .asm_4e86 +.asm_4e6d + bit 1, a + jr z, .asm_4e75 + ld a, $8 + jr .asm_4e86 +.asm_4e75 + bit 0, a + jr z, .asm_4e7d + ld a, $c + jr .asm_4e86 +.asm_4e7d + xor a + ld [$c107], a + ld [$c108], a + jr .asm_4eab +.asm_4e86 + ld [$c109], a + ld a, [$cfc4] + bit 0, a + jr nz, .asm_4e7d +.asm_4e90 + ld a, [$d736] + bit 7, a + jr nz, .asm_4eb6 + ld a, [H_CURRENTSPRITEOFFSET] + add $7 + ld l, a + ld a, [hl] + inc a + ld [hl], a + cp $4 + jr nz, .asm_4eab + xor a + ld [hl], a + inc hl + ld a, [hl] + inc a + and $3 + ld [hl], a +.asm_4eab + ld a, [$c108] + ld b, a + ld a, [$c109] + add b + ld [$c102], a +.asm_4eb6 + ld a, [$ff93] + ld c, a + ld a, [W_GRASSTILE] + cp c + ld a, $0 + jr nz, .asm_4ec3 + ld a, $80 +.asm_4ec3 + ld [$c207], a + ret + +Func_4ec7: ; 4ec7 (1:4ec7) + push bc + push af + ld a, [$ffda] + ld c, a + pop af + add c + ld l, a + pop bc + ret + +Func_4ed1: ; 4ed1 (1:4ed1) + ld a, [H_CURRENTSPRITEOFFSET] + swap a + dec a + add a + ld hl, W_MAPSPRITEDATA ; $d4e4 + add l + ld l, a + ld a, [hl] ; read movement byte 2 + ld [wCurSpriteMovement2], a + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + ld l, a + inc l + ld a, [hl] ; c1x1 + and a + jp z, InitializeSpriteStatus + call CheckSpriteAvailability + ret c ; if sprite is invisible, on tile >=$60, in grass or player is currently walking + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + ld l, a + inc l + ld a, [hl] ; c1x1 + bit 7, a + jp nz, InitializeSpriteFacingDirection ; c1x1 >= $80 + ld b, a + ld a, [$cfc4] + bit 0, a + jp nz, notYetMoving + ld a, b + cp $2 + jp z, UpdateSpriteMovementDelay ; c1x1 == 2 + cp $3 + jp z, UpdateSpriteInWalkingAnimation ; c1x1 == 3 + ld a, [wWalkCounter] ; $cfc5 + and a + ret nz ; don't do anything yet if player is currently moving (redundant, already tested in CheckSpriteAvailability) + call InitializeSpriteScreenPosition + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $6 + ld l, a + ld a, [hl] ; c2x6: movement byte 1 + inc a + jr z, .asm_4f59 ; value $FF + inc a + jr z, .asm_4f59 ; value $FE + dec a + ld [hl], a ; (temporarily) increment movement byte 1 + dec a + push hl + ld hl, $cf0f + dec [hl] ; decrement $cf0f + pop hl + ld de, $cc5b + call LoadDEPlusA ; a = [$cc5b + movement byte 1] + cp $e0 + jp z, ChangeFacingDirection + cp $ff + jr nz, .asm_4f4b + ld [hl], a ; reset movement byte 1 to initial value + ld hl, $d730 + res 0, [hl] + xor a + ld [$cd38], a + ld [$cd3a], a + ret +.asm_4f4b + cp $fe + jr nz, .asm_4f5f + ld [hl], $1 ; set movement byte 1 to $1 + ld de, $cc5b + call LoadDEPlusA ; a = [$cc5b + $fe] (?) + jr .asm_4f5f +.asm_4f59 + call getTileSpriteStandsOn + call Random +.asm_4f5f + ld b, a + ld a, [wCurSpriteMovement2] + cp $d0 + jr z, .moveDown ; movement byte 2 = $d0 forces down + cp $d1 + jr z, .moveUp ; movement byte 2 = $d1 forces up + cp $d2 + jr z, .moveLeft ; movement byte 2 = $d2 forces left + cp $d3 + jr z, .moveRight ; movement byte 2 = $d3 forces right + ld a, b + cp $40 ; a < $40: down (or left) + jr nc, .notDown + ld a, [wCurSpriteMovement2] + cp $2 + jr z, .moveLeft ; movement byte 2 = $2 only allows left or right +.moveDown + ld de, 2*20 + add hl, de ; move tile pointer two rows down + ld de, $100 + + ld bc, $400 + jr TryWalking +.notDown + cp $80 ; $40 <= a < $80: up (or right) + jr nc, .notUp + ld a, [wCurSpriteMovement2] + cp $2 + jr z, .moveRight ; movement byte 2 = $2 only allows left or right +.moveUp + ld de, -2*20 ; $ffd8 + add hl, de ; move tile pointer two rows up + ld de, $ff00 + ld bc, $804 + jr TryWalking +.notUp + cp $c0 ; $80 <= a < $c0: left (or up) + jr nc, .notLeft + ld a, [wCurSpriteMovement2] + cp $1 + jr z, .moveUp ; movement byte 2 = $1 only allows up or down +.moveLeft + dec hl + dec hl ; move tile pointer two columns left + ld de, $ff + ld bc, $208 + jr TryWalking +.notLeft ; $c0 <= a: right (or down) + ld a, [wCurSpriteMovement2] + cp $1 + jr z, .moveDown ; movement byte 2 = $1 only allows up or down +.moveRight + inc hl + inc hl ; move tile pointer two columns right + ld de, $1 + ld bc, $10c + jr TryWalking + +; changes facing direction by zeroing the movement delta and calling TryWalking +ChangeFacingDirection: ; 4fc8 (1:4fc8) + ld de, $0 + ; fall through + +; b: direction (1,2,4 or 8) +; c: new facing direction (0,4,8 or $c) +; d: Y movement delta (-1, 0 or 1) +; e: X movement delta (-1, 0 or 1) +; hl: pointer to tile the sprite would wlak onto +; set carry on failure, clears carry on success +TryWalking: ; 4fcb (1:4fcb) + push hl + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $9 + ld l, a + ld [hl], c ; c1x9 (update facing direction) + ld a, [H_CURRENTSPRITEOFFSET] + add $3 + ld l, a + ld [hl], d ; c1x3 (update Y movement delta) + inc l + inc l + ld [hl], e ; c1x5 (update X movement delta) + pop hl + push de + ld c, [hl] ; read tile to walk onto + call CanWalkOntoTile + pop de + ret c ; cannot walk there (reinitialization of delay values already done) + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $4 + ld l, a + ld a, [hl] ; c2x4: Y position + add d + ld [hli], a ; update Y position + ld a, [hl] ; c2x5: X position + add e + ld [hl], a ; update X position + ld a, [H_CURRENTSPRITEOFFSET] + ld l, a + ld [hl], $10 ; c2x0=16: walk animation counter + dec h + inc l + ld [hl], $3 ; c1x1: set movement status to walking + jp UpdateSpriteImage + +; update the walking animation parameters for a sprite that is currently walking +UpdateSpriteInWalkingAnimation: ; 4ffe (1:4ffe) + ld a, [H_CURRENTSPRITEOFFSET] + add $7 + ld l, a + ld a, [hl] ; c1x7 (counter until next walk animation frame) + inc a + ld [hl], a ; c1x7 += 1 + cp $4 + jr nz, .noNextAnimationFrame + xor a + ld [hl], a ; c1x7 = 0 + inc l + ld a, [hl] ; c1x8 (walk animation frame) + inc a + and $3 + ld [hl], a ; advance to next animation frame every 4 ticks (16 ticks total for one step) +.noNextAnimationFrame + ld a, [H_CURRENTSPRITEOFFSET] + add $3 + ld l, a + ld a, [hli] ; c1x3 (movement Y delta) + ld b, a + ld a, [hl] ; c1x4 (screen Y position) + add b + ld [hli], a ; update screen Y position + ld a, [hli] ; c1x5 (movement X delta) + ld b, a + ld a, [hl] ; c1x6 (screen X position) + add b + ld [hl], a ; update screen X position + ld a, [H_CURRENTSPRITEOFFSET] + ld l, a + inc h + ld a, [hl] ; c2x0 (walk animantion counter) + dec a + ld [hl], a ; update walk animantion counter + ret nz + ld a, $6 ; walking finished, update state + add l + ld l, a + ld a, [hl] ; c2x6 (movement byte 1) + cp $fe + jr nc, .initNextMovementCounter ; values $fe and $ff + ld a, [H_CURRENTSPRITEOFFSET] + inc a + ld l, a + dec h + ld [hl], $1 ; c1x1 = 1 (movement status ready) + ret +.initNextMovementCounter + call Random + ld a, [H_CURRENTSPRITEOFFSET] + add $8 + ld l, a + ld a, [hRandomAdd] + and $7f + ld [hl], a ; c2x8: set next movement delay to a random value in [0,$7f] + dec h ; note that value 0 actually makes the delay $100 (bug?) + ld a, [H_CURRENTSPRITEOFFSET] + inc a + ld l, a + ld [hl], $2 ; c1x1 = 2 (movement status) + inc l + inc l + xor a + ld b, [hl] ; c1x3 (movement Y delta) + ld [hli], a ; reset movement Y delta + inc l + ld c, [hl] ; c1x5 (movement X delta) + ld [hl], a ; reset movement X delta + ret + +; update delay value (c2x8) for sprites in the delayed state (c1x1) +UpdateSpriteMovementDelay: ; 5057 (1:5057) + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $6 + ld l, a + ld a, [hl] ; c2x6: movement byte 1 + inc l + inc l + cp $fe + jr nc, .tickMoveCounter ; values $fe or $ff + ld [hl], $0 + jr .moving +.tickMoveCounter + dec [hl] ; c2x8: frame counter until next movement + jr nz, notYetMoving +.moving + dec h + ld a, [H_CURRENTSPRITEOFFSET] + inc a + ld l, a + ld [hl], $1 ; c1x1 = 1 (mark as ready to move) +notYetMoving: ; 5073 (1:5073) + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $8 + ld l, a + ld [hl], $0 ; c1x8 = 0 (walk animation frame) + jp UpdateSpriteImage + +InitializeSpriteFacingDirection: ; 507f (1:507f) + ld a, [$d72d] + bit 5, a + jr nz, notYetMoving + res 7, [hl] + ld a, [$d52a] + bit 3, a + jr z, .notFacingDown + ld c, $0 ; make sprite face down + jr .facingDirectionDetermined +.notFacingDown + bit 2, a + jr z, .notFacingUp + ld c, $4 ; make sprite face up + jr .facingDirectionDetermined +.notFacingUp + bit 1, a + jr z, .notFacingRight + ld c, $c ; make sprite face right + jr .facingDirectionDetermined +.notFacingRight + ld c, $8 ; make sprite face left +.facingDirectionDetermined + ld a, [H_CURRENTSPRITEOFFSET] + add $9 + ld l, a + ld [hl], c ; c1x9: set facing direction + jr notYetMoving + +InitializeSpriteStatus: ; 50ad (1:50ad) + ld [hl], $1 ; $c1x1: set movement status to ready + inc l + ld [hl], $ff ; $c1x2: set sprite image to $ff (invisible/off screen) + inc h + ld a, [H_CURRENTSPRITEOFFSET] + add $2 + ld l, a + ld a, $8 + ld [hli], a ; $c2x2: set Y displacement to 8 + ld [hl], a ; $c2x3: set X displacement to 8 + ret + +; calculates the spprite's scrren position form its map position and the player position +InitializeSpriteScreenPosition: ; 50bd (1:50bd) + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $4 + ld l, a + ld a, [W_YCOORD] ; $d361 + ld b, a + ld a, [hl] ; c2x4 (Y position + 4) + sub b ; relative to player position + swap a ; * 16 + sub $4 ; - 4 + dec h + ld [hli], a ; c1x4 (screen Y position) + inc h + ld a, [W_XCOORD] ; $d362 + ld b, a + ld a, [hli] ; c2x6 (X position + 4) + sub b ; relative to player position + swap a ; * 16 + dec h + ld [hl], a ; c1x6 (screen X position) + ret + +; tests if sprite is off screen or otherwise unable to do anything +CheckSpriteAvailability: ; 50dc (1:50dc) + ld a, $12 + call Predef ; indirect jump to IsMissableObjectHidden (f1a6 (3:71a6)) + ld a, [$ffe5] + and a + jp nz, .spriteInvisible + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $6 + ld l, a + ld a, [hl] ; c2x6: movement byte 1 + cp $fe + jr c, .skipXVisibilityTest ; movement byte 1 < $fe + ld a, [H_CURRENTSPRITEOFFSET] + add $4 + ld l, a + ld b, [hl] ; c2x4: Y pos (+4) + ld a, [W_YCOORD] ; $d361 + cp b + jr z, .skipYVisibilityTest + jr nc, .spriteInvisible ; above screen region + add $8 ; screen is 9 tiles high + cp b + jr c, .spriteInvisible ; below screen region +.skipYVisibilityTest + inc l + ld b, [hl] ; c2x5: X pos (+4) + ld a, [W_XCOORD] ; $d362 + cp b + jr z, .skipXVisibilityTest + jr nc, .spriteInvisible ; left of screen region + add $9 ; screen is 10 tiles wide + cp b + jr c, .spriteInvisible ; right of screen region +.skipXVisibilityTest + call getTileSpriteStandsOn + ld d, $60 + ld a, [hli] + cp d + jr nc, .spriteInvisible ; standing on tile with ID >=$60 (bottom left tile) + ld a, [hld] + cp d + jr nc, .spriteInvisible ; standing on tile with ID >=$60 (bottom right tile) + ld bc, -20 ; $ffec + add hl, bc ; go back one row of tiles + ld a, [hli] + cp d + jr nc, .spriteInvisible ; standing on tile with ID >=$60 (top left tile) + ld a, [hl] + cp d + jr c, .spriteVisible ; standing on tile with ID >=$60 (top right tile) +.spriteInvisible + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $2 + ld l, a + ld [hl], $ff ; c1x2 + scf + jr .done +.spriteVisible + ld c, a + ld a, [wWalkCounter] ; $cfc5 + and a + jr nz, .done ; if player is currently walking, we're done + call UpdateSpriteImage + inc h + ld a, [H_CURRENTSPRITEOFFSET] + add $7 + ld l, a + ld a, [W_GRASSTILE] + cp c + ld a, $0 + jr nz, .notInGrass + ld a, $80 +.notInGrass + ld [hl], a ; c2x7 + and a +.done + ret + +UpdateSpriteImage: ; 5157 (1:5157) + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $8 + ld l, a + ld a, [hli] ; c1x8: walk animation frame + ld b, a + ld a, [hl] ; c1x9: facing direction + add b + ld b, a + ld a, [$ff93] ; current sprite offset + add b + ld b, a + ld a, [H_CURRENTSPRITEOFFSET] + add $2 + ld l, a + ld [hl], b ; c1x2: sprite to display + ret + +; tests if sprite can walk the specified direction +; b: direction (1,2,4 or 8) +; c: ID of tile the sprite would walk onto +; d: Y movement delta (-1, 0 or 1) +; e: X movement delta (-1, 0 or 1) +; set carry on failure, clears carry on success +CanWalkOntoTile: ; 516e (1:516e) + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $6 + ld l, a + ld a, [hl] ; c2x6 (movement byte 1) + cp $fe + jr nc, .canMove ; values $fe and $ff + and a + ret +.canMove + ld a, [W_TILESETCOLLISIONPTR] + ld l, a + ld a, [W_TILESETCOLLISIONPTR+1] + ld h, a +.tilePassableLoop + ld a, [hli] + cp $ff + jr z, .impassable + cp c + jr nz, .tilePassableLoop + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $6 + ld l, a + ld a, [hl] ; $c2x6 (movement byte 1) + inc a + jr z, .impassable ; if $ff, no movement allowed (however, changing direction is) + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $4 + ld l, a + ld a, [hli] ; c1x4 (screen Y pos) + add $4 ; align to blocks (Y pos is always 4 pixels off) + add d ; add Y delta + cp $80 ; if value is >$80, the destination is off screen (either $81 or $FF underflow) + jr nc, .impassable ; don't walk off screen + inc l + ld a, [hl] ; c1x6 (screen X pos) + add e ; add X delta + cp $90 ; if value is >$90, the destination is off screen (either $91 or $FF underflow) + jr nc, .impassable ; don't walk off screen + push de + push bc + call Func_4c70 + pop bc + pop de + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $c + ld l, a + ld a, [hl] ; c1xc (forbidden directions flags(?)) + and b ; check against chosen direction (1,2,4 or 8) + jr nz, .impassable ; direction forbidden, don't go there + ld h, $c2 + ld a, [H_CURRENTSPRITEOFFSET] + add $2 + ld l, a + ld a, [hli] ; c2x2 (sprite Y displacement, initialized at $8, keep track of where a sprite did go) + bit 7, d ; check if going upwards (d=$ff) + jr nz, .upwards + add d + cp $5 + jr c, .impassable ; if c2x2+d < 5, don't go ;bug: this tests probably were supposed to prevent sprites + jr .checkHorizontal ; from walking out too far, but this line makes sprites get stuck +.upwards ; whenever they walked upwards 5 steps + sub $1 ; on the other hand, the amount a sprite can walk out to the + jr c, .impassable ; if d2x2 == 0, don't go ; right of bottom is not limited (until the counter overflows) +.checkHorizontal + ld d, a + ld a, [hl] ; c2x3 (sprite X displacement, initialized at $8, keep track of where a sprite did go) + bit 7, e ; check if going left (e=$ff) + jr nz, .left + add e + cp $5 ; compare, but no conditional jump like in the vertical check above (bug?) + jr .passable +.left + sub $1 + jr c, .impassable ; if d2x3 == 0, don't go +.passable + ld [hld], a ; update c2x3 + ld [hl], d ; update c2x2 + and a ; clear carry (marking success) + ret +.impassable + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + inc a + ld l, a + ld [hl], $2 ; c1x1 = 2 (set movement status to delayed) + inc l + inc l + xor a + ld [hli], a ; c1x3 = 0 (clear Y movement delta) + inc l + ld [hl], a ; c1x5 = 0 (clear X movement delta) + inc h + ld a, [H_CURRENTSPRITEOFFSET] + add $8 + ld l, a + call Random + ld a, [hRandomAdd] + and $7f + ld [hl], a ; c2x8: set next movement delay to a random value in [0,$7f] (again with delay $100 if value is 0) + scf ; set carry (marking failure to walk) + ret + +; calculates the tile pointer pointing to the tile the current sprite stancs on +; this is always the lower left tile of the 2x2 tile blocks all sprites are snapped to +; hl: output pointer +getTileSpriteStandsOn: ; 5207 (1:5207) + ld h, $c1 + ld a, [H_CURRENTSPRITEOFFSET] + add $4 + ld l, a + ld a, [hli] ; c1x4: screen Y position + add $4 ; align to 2*2 tile blocks (Y position is always off 4 pixels to the top) + and $f0 ; in case object is currently moving + srl a ; screen Y tile * 4 + ld c, a + ld b, $0 + inc l + ld a, [hl] ; c1x6: screen Y position + srl a + srl a + srl a ; screen X tile + add $14 ; screen X tile + 20 + ld d, $0 + ld e, a + ld hl, wTileMap + add hl, bc + add hl, bc + add hl, bc + add hl, bc + add hl, bc + add hl, de ; wTileMap + 20*(screen Y tile + 1) + screen X tile + ret + +; loads [de+a] into a +LoadDEPlusA: ; 522f (1:522f) + add e + ld e, a + jr nc, .noCarry + inc d +.noCarry + ld a, [de] + ret + +Func_5236: ; 5236 (1:5236) + ld a, [$d730] + bit 7, a + ret z + ld hl, $d72e + bit 7, [hl] + set 7, [hl] + jp z, Func_52a6 + ld hl, $cc97 + ld a, [$cd37] + add l + ld l, a + jr nc, .asm_5251 + inc h +.asm_5251 + ld a, [hl] + cp $40 + jr nz, .asm_525f + call Func_52b2 + ld c, $4 + ld a, $fe + jr .asm_5289 +.asm_525f + cp $0 + jr nz, .asm_526c + call Func_52b2 + ld c, $0 + ld a, $2 + jr .asm_5289 +.asm_526c + cp $80 + jr nz, .asm_5279 + call Func_52b7 + ld c, $8 + ld a, $fe + jr .asm_5289 +.asm_5279 + cp $c0 + jr nz, .asm_5286 + call Func_52b7 + ld c, $c + ld a, $2 + jr .asm_5289 +.asm_5286 + cp $ff + ret +.asm_5289 + ld b, a + ld a, [hl] + add b + ld [hl], a + ld a, [H_CURRENTSPRITEOFFSET] + add $9 + ld l, a + ld a, c + ld [hl], a + call Func_52c3 + ld hl, $cf18 + dec [hl] + ret nz + ld a, $8 + ld [$cf18], a + ld hl, $cd37 + inc [hl] + ret + +Func_52a6: ; 52a6 (1:52a6) + xor a + ld [$cd37], a + ld a, $8 + ld [$cf18], a + jp Func_52c3 + +Func_52b2: ; 52b2 (1:52b2) + ld a, $4 + ld b, a + jr asm_52ba + +Func_52b7: ; 52b7 (1:52b7) + ld a, $6 + ld b, a +asm_52ba: ; 52ba (1:52ba) + ld hl, wSpriteStateData1 + ld a, [H_CURRENTSPRITEOFFSET] + add l + add b + ld l, a + ret + +Func_52c3: ; 52c3 (1:52c3) + ld hl, wSpriteStateData2 + ld a, [H_CURRENTSPRITEOFFSET] + add $e + ld l, a + ld a, [hl] + dec a + swap a + ld b, a + ld hl, wSpriteStateData1 + ld a, [H_CURRENTSPRITEOFFSET] + add $9 + ld l, a + ld a, [hl] + cp $0 + jr z, .asm_52ea + cp $4 + jr z, .asm_52ea + cp $8 + jr z, .asm_52ea + cp $c + jr z, .asm_52ea + ret +.asm_52ea + add b + ld b, a + ld [$ffe9], a + call Func_5301 + ld hl, wSpriteStateData1 + ld a, [H_CURRENTSPRITEOFFSET] + add $2 + ld l, a + ld a, [$ffe9] + ld b, a + ld a, [$ffea] + add b + ld [hl], a + ret + +Func_5301: ; 5301 (1:5301) + ld a, [H_CURRENTSPRITEOFFSET] + add $7 + ld l, a + ld a, [hl] + inc a + ld [hl], a + cp $4 + ret nz + xor a + ld [hl], a + inc l + ld a, [hl] + inc a + and $3 + ld [hl], a + ld [$ffea], a + ret @@ -544,865 +544,7 @@ NoMoreRoomForItemText: TX_FAR _NoMoreRoomForItemText db "@" - -UpdatePlayerSprite: ; 4e31 (1:4e31) - ld a, [wSpriteStateData2] - and a - jr z, .asm_4e41 - cp $ff - jr z, .asm_4e4a - dec a - ld [wSpriteStateData2], a - jr .asm_4e4a -.asm_4e41 - FuncCoord 8, 9 ; $c45c - ld a, [Coord] - ld [$ff93], a - cp $60 - jr c, .asm_4e50 -.asm_4e4a - ld a, $ff - ld [$c102], a - ret -.asm_4e50 - call Func_4c70 - ld h, $c1 - ld a, [wWalkCounter] ; $cfc5 - and a - jr nz, .asm_4e90 - ld a, [$d528] - bit 2, a - jr z, .asm_4e65 - xor a - jr .asm_4e86 -.asm_4e65 - bit 3, a - jr z, .asm_4e6d - ld a, $4 - jr .asm_4e86 -.asm_4e6d - bit 1, a - jr z, .asm_4e75 - ld a, $8 - jr .asm_4e86 -.asm_4e75 - bit 0, a - jr z, .asm_4e7d - ld a, $c - jr .asm_4e86 -.asm_4e7d - xor a - ld [$c107], a - ld [$c108], a - jr .asm_4eab -.asm_4e86 - ld [$c109], a - ld a, [$cfc4] - bit 0, a - jr nz, .asm_4e7d -.asm_4e90 - ld a, [$d736] - bit 7, a - jr nz, .asm_4eb6 - ld a, [H_CURRENTSPRITEOFFSET] - add $7 - ld l, a - ld a, [hl] - inc a - ld [hl], a - cp $4 - jr nz, .asm_4eab - xor a - ld [hl], a - inc hl - ld a, [hl] - inc a - and $3 - ld [hl], a -.asm_4eab - ld a, [$c108] - ld b, a - ld a, [$c109] - add b - ld [$c102], a -.asm_4eb6 - ld a, [$ff93] - ld c, a - ld a, [W_GRASSTILE] - cp c - ld a, $0 - jr nz, .asm_4ec3 - ld a, $80 -.asm_4ec3 - ld [$c207], a - ret - -Func_4ec7: ; 4ec7 (1:4ec7) - push bc - push af - ld a, [$ffda] - ld c, a - pop af - add c - ld l, a - pop bc - ret - -Func_4ed1: ; 4ed1 (1:4ed1) - ld a, [H_CURRENTSPRITEOFFSET] - swap a - dec a - add a - ld hl, W_MAPSPRITEDATA ; $d4e4 - add l - ld l, a - ld a, [hl] ; read movement byte 2 - ld [wCurSpriteMovement2], a - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - ld l, a - inc l - ld a, [hl] ; c1x1 - and a - jp z, InitializeSpriteStatus - call CheckSpriteAvailability - ret c ; if sprite is invisible, on tile >=$60, in grass or player is currently walking - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - ld l, a - inc l - ld a, [hl] ; c1x1 - bit 7, a - jp nz, InitializeSpriteFacingDirection ; c1x1 >= $80 - ld b, a - ld a, [$cfc4] - bit 0, a - jp nz, notYetMoving - ld a, b - cp $2 - jp z, UpdateSpriteMovementDelay ; c1x1 == 2 - cp $3 - jp z, UpdateSpriteInWalkingAnimation ; c1x1 == 3 - ld a, [wWalkCounter] ; $cfc5 - and a - ret nz ; don't do anything yet if player is currently moving (redundant, already tested in CheckSpriteAvailability) - call InitializeSpriteScreenPosition - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $6 - ld l, a - ld a, [hl] ; c2x6: movement byte 1 - inc a - jr z, .asm_4f59 ; value $FF - inc a - jr z, .asm_4f59 ; value $FE - dec a - ld [hl], a ; (temporarily) increment movement byte 1 - dec a - push hl - ld hl, $cf0f - dec [hl] ; decrement $cf0f - pop hl - ld de, $cc5b - call LoadDEPlusA ; a = [$cc5b + movement byte 1] - cp $e0 - jp z, ChangeFacingDirection - cp $ff - jr nz, .asm_4f4b - ld [hl], a ; reset movement byte 1 to initial value - ld hl, $d730 - res 0, [hl] - xor a - ld [$cd38], a - ld [$cd3a], a - ret -.asm_4f4b - cp $fe - jr nz, .asm_4f5f - ld [hl], $1 ; set movement byte 1 to $1 - ld de, $cc5b - call LoadDEPlusA ; a = [$cc5b + $fe] (?) - jr .asm_4f5f -.asm_4f59 - call getTileSpriteStandsOn - call Random -.asm_4f5f - ld b, a - ld a, [wCurSpriteMovement2] - cp $d0 - jr z, .moveDown ; movement byte 2 = $d0 forces down - cp $d1 - jr z, .moveUp ; movement byte 2 = $d1 forces up - cp $d2 - jr z, .moveLeft ; movement byte 2 = $d2 forces left - cp $d3 - jr z, .moveRight ; movement byte 2 = $d3 forces right - ld a, b - cp $40 ; a < $40: down (or left) - jr nc, .notDown - ld a, [wCurSpriteMovement2] - cp $2 - jr z, .moveLeft ; movement byte 2 = $2 only allows left or right -.moveDown - ld de, 2*20 - add hl, de ; move tile pointer two rows down - ld de, $100 - - ld bc, $400 - jr TryWalking -.notDown - cp $80 ; $40 <= a < $80: up (or right) - jr nc, .notUp - ld a, [wCurSpriteMovement2] - cp $2 - jr z, .moveRight ; movement byte 2 = $2 only allows left or right -.moveUp - ld de, -2*20 ; $ffd8 - add hl, de ; move tile pointer two rows up - ld de, $ff00 - ld bc, $804 - jr TryWalking -.notUp - cp $c0 ; $80 <= a < $c0: left (or up) - jr nc, .notLeft - ld a, [wCurSpriteMovement2] - cp $1 - jr z, .moveUp ; movement byte 2 = $1 only allows up or down -.moveLeft - dec hl - dec hl ; move tile pointer two columns left - ld de, $ff - ld bc, $208 - jr TryWalking -.notLeft ; $c0 <= a: right (or down) - ld a, [wCurSpriteMovement2] - cp $1 - jr z, .moveDown ; movement byte 2 = $1 only allows up or down -.moveRight - inc hl - inc hl ; move tile pointer two columns right - ld de, $1 - ld bc, $10c - jr TryWalking - -; changes facing direction by zeroing the movement delta and calling TryWalking -ChangeFacingDirection: ; 4fc8 (1:4fc8) - ld de, $0 - ; fall through - -; b: direction (1,2,4 or 8) -; c: new facing direction (0,4,8 or $c) -; d: Y movement delta (-1, 0 or 1) -; e: X movement delta (-1, 0 or 1) -; hl: pointer to tile the sprite would wlak onto -; set carry on failure, clears carry on success -TryWalking: ; 4fcb (1:4fcb) - push hl - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $9 - ld l, a - ld [hl], c ; c1x9 (update facing direction) - ld a, [H_CURRENTSPRITEOFFSET] - add $3 - ld l, a - ld [hl], d ; c1x3 (update Y movement delta) - inc l - inc l - ld [hl], e ; c1x5 (update X movement delta) - pop hl - push de - ld c, [hl] ; read tile to walk onto - call CanWalkOntoTile - pop de - ret c ; cannot walk there (reinitialization of delay values already done) - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $4 - ld l, a - ld a, [hl] ; c2x4: Y position - add d - ld [hli], a ; update Y position - ld a, [hl] ; c2x5: X position - add e - ld [hl], a ; update X position - ld a, [H_CURRENTSPRITEOFFSET] - ld l, a - ld [hl], $10 ; c2x0=16: walk animation counter - dec h - inc l - ld [hl], $3 ; c1x1: set movement status to walking - jp UpdateSpriteImage - -; update the walking animation parameters for a sprite that is currently walking -UpdateSpriteInWalkingAnimation: ; 4ffe (1:4ffe) - ld a, [H_CURRENTSPRITEOFFSET] - add $7 - ld l, a - ld a, [hl] ; c1x7 (counter until next walk animation frame) - inc a - ld [hl], a ; c1x7 += 1 - cp $4 - jr nz, .noNextAnimationFrame - xor a - ld [hl], a ; c1x7 = 0 - inc l - ld a, [hl] ; c1x8 (walk animation frame) - inc a - and $3 - ld [hl], a ; advance to next animation frame every 4 ticks (16 ticks total for one step) -.noNextAnimationFrame - ld a, [H_CURRENTSPRITEOFFSET] - add $3 - ld l, a - ld a, [hli] ; c1x3 (movement Y delta) - ld b, a - ld a, [hl] ; c1x4 (screen Y position) - add b - ld [hli], a ; update screen Y position - ld a, [hli] ; c1x5 (movement X delta) - ld b, a - ld a, [hl] ; c1x6 (screen X position) - add b - ld [hl], a ; update screen X position - ld a, [H_CURRENTSPRITEOFFSET] - ld l, a - inc h - ld a, [hl] ; c2x0 (walk animantion counter) - dec a - ld [hl], a ; update walk animantion counter - ret nz - ld a, $6 ; walking finished, update state - add l - ld l, a - ld a, [hl] ; c2x6 (movement byte 1) - cp $fe - jr nc, .initNextMovementCounter ; values $fe and $ff - ld a, [H_CURRENTSPRITEOFFSET] - inc a - ld l, a - dec h - ld [hl], $1 ; c1x1 = 1 (movement status ready) - ret -.initNextMovementCounter - call Random - ld a, [H_CURRENTSPRITEOFFSET] - add $8 - ld l, a - ld a, [hRandomAdd] - and $7f - ld [hl], a ; c2x8: set next movement delay to a random value in [0,$7f] - dec h ; note that value 0 actually makes the delay $100 (bug?) - ld a, [H_CURRENTSPRITEOFFSET] - inc a - ld l, a - ld [hl], $2 ; c1x1 = 2 (movement status) - inc l - inc l - xor a - ld b, [hl] ; c1x3 (movement Y delta) - ld [hli], a ; reset movement Y delta - inc l - ld c, [hl] ; c1x5 (movement X delta) - ld [hl], a ; reset movement X delta - ret - -; update delay value (c2x8) for sprites in the delayed state (c1x1) -UpdateSpriteMovementDelay: ; 5057 (1:5057) - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $6 - ld l, a - ld a, [hl] ; c2x6: movement byte 1 - inc l - inc l - cp $fe - jr nc, .tickMoveCounter ; values $fe or $ff - ld [hl], $0 - jr .moving -.tickMoveCounter - dec [hl] ; c2x8: frame counter until next movement - jr nz, notYetMoving -.moving - dec h - ld a, [H_CURRENTSPRITEOFFSET] - inc a - ld l, a - ld [hl], $1 ; c1x1 = 1 (mark as ready to move) -notYetMoving: ; 5073 (1:5073) - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $8 - ld l, a - ld [hl], $0 ; c1x8 = 0 (walk animation frame) - jp UpdateSpriteImage - -InitializeSpriteFacingDirection: ; 507f (1:507f) - ld a, [$d72d] - bit 5, a - jr nz, notYetMoving - res 7, [hl] - ld a, [$d52a] - bit 3, a - jr z, .notFacingDown - ld c, $0 ; make sprite face down - jr .facingDirectionDetermined -.notFacingDown - bit 2, a - jr z, .notFacingUp - ld c, $4 ; make sprite face up - jr .facingDirectionDetermined -.notFacingUp - bit 1, a - jr z, .notFacingRight - ld c, $c ; make sprite face right - jr .facingDirectionDetermined -.notFacingRight - ld c, $8 ; make sprite face left -.facingDirectionDetermined - ld a, [H_CURRENTSPRITEOFFSET] - add $9 - ld l, a - ld [hl], c ; c1x9: set facing direction - jr notYetMoving - -InitializeSpriteStatus: ; 50ad (1:50ad) - ld [hl], $1 ; $c1x1: set movement status to ready - inc l - ld [hl], $ff ; $c1x2: set sprite image to $ff (invisible/off screen) - inc h - ld a, [H_CURRENTSPRITEOFFSET] - add $2 - ld l, a - ld a, $8 - ld [hli], a ; $c2x2: set Y displacement to 8 - ld [hl], a ; $c2x3: set X displacement to 8 - ret - -; calculates the spprite's scrren position form its map position and the player position -InitializeSpriteScreenPosition: ; 50bd (1:50bd) - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $4 - ld l, a - ld a, [W_YCOORD] ; $d361 - ld b, a - ld a, [hl] ; c2x4 (Y position + 4) - sub b ; relative to player position - swap a ; * 16 - sub $4 ; - 4 - dec h - ld [hli], a ; c1x4 (screen Y position) - inc h - ld a, [W_XCOORD] ; $d362 - ld b, a - ld a, [hli] ; c2x6 (X position + 4) - sub b ; relative to player position - swap a ; * 16 - dec h - ld [hl], a ; c1x6 (screen X position) - ret - -; tests if sprite is off screen or otherwise unable to do anything -CheckSpriteAvailability: ; 50dc (1:50dc) - ld a, $12 - call Predef ; indirect jump to IsMissableObjectHidden (f1a6 (3:71a6)) - ld a, [$ffe5] - and a - jp nz, .spriteInvisible - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $6 - ld l, a - ld a, [hl] ; c2x6: movement byte 1 - cp $fe - jr c, .skipXVisibilityTest ; movement byte 1 < $fe - ld a, [H_CURRENTSPRITEOFFSET] - add $4 - ld l, a - ld b, [hl] ; c2x4: Y pos (+4) - ld a, [W_YCOORD] ; $d361 - cp b - jr z, .skipYVisibilityTest - jr nc, .spriteInvisible ; above screen region - add $8 ; screen is 9 tiles high - cp b - jr c, .spriteInvisible ; below screen region -.skipYVisibilityTest - inc l - ld b, [hl] ; c2x5: X pos (+4) - ld a, [W_XCOORD] ; $d362 - cp b - jr z, .skipXVisibilityTest - jr nc, .spriteInvisible ; left of screen region - add $9 ; screen is 10 tiles wide - cp b - jr c, .spriteInvisible ; right of screen region -.skipXVisibilityTest - call getTileSpriteStandsOn - ld d, $60 - ld a, [hli] - cp d - jr nc, .spriteInvisible ; standing on tile with ID >=$60 (bottom left tile) - ld a, [hld] - cp d - jr nc, .spriteInvisible ; standing on tile with ID >=$60 (bottom right tile) - ld bc, -20 ; $ffec - add hl, bc ; go back one row of tiles - ld a, [hli] - cp d - jr nc, .spriteInvisible ; standing on tile with ID >=$60 (top left tile) - ld a, [hl] - cp d - jr c, .spriteVisible ; standing on tile with ID >=$60 (top right tile) -.spriteInvisible - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $2 - ld l, a - ld [hl], $ff ; c1x2 - scf - jr .done -.spriteVisible - ld c, a - ld a, [wWalkCounter] ; $cfc5 - and a - jr nz, .done ; if player is currently walking, we're done - call UpdateSpriteImage - inc h - ld a, [H_CURRENTSPRITEOFFSET] - add $7 - ld l, a - ld a, [W_GRASSTILE] - cp c - ld a, $0 - jr nz, .notInGrass - ld a, $80 -.notInGrass - ld [hl], a ; c2x7 - and a -.done - ret - -UpdateSpriteImage: ; 5157 (1:5157) - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $8 - ld l, a - ld a, [hli] ; c1x8: walk animation frame - ld b, a - ld a, [hl] ; c1x9: facing direction - add b - ld b, a - ld a, [$ff93] ; current sprite offset - add b - ld b, a - ld a, [H_CURRENTSPRITEOFFSET] - add $2 - ld l, a - ld [hl], b ; c1x2: sprite to display - ret - -; tests if sprite can walk the specified direction -; b: direction (1,2,4 or 8) -; c: ID of tile the sprite would walk onto -; d: Y movement delta (-1, 0 or 1) -; e: X movement delta (-1, 0 or 1) -; set carry on failure, clears carry on success -CanWalkOntoTile: ; 516e (1:516e) - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $6 - ld l, a - ld a, [hl] ; c2x6 (movement byte 1) - cp $fe - jr nc, .canMove ; values $fe and $ff - and a - ret -.canMove - ld a, [W_TILESETCOLLISIONPTR] - ld l, a - ld a, [W_TILESETCOLLISIONPTR+1] - ld h, a -.tilePassableLoop - ld a, [hli] - cp $ff - jr z, .impassable - cp c - jr nz, .tilePassableLoop - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $6 - ld l, a - ld a, [hl] ; $c2x6 (movement byte 1) - inc a - jr z, .impassable ; if $ff, no movement allowed (however, changing direction is) - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $4 - ld l, a - ld a, [hli] ; c1x4 (screen Y pos) - add $4 ; align to blocks (Y pos is always 4 pixels off) - add d ; add Y delta - cp $80 ; if value is >$80, the destination is off screen (either $81 or $FF underflow) - jr nc, .impassable ; don't walk off screen - inc l - ld a, [hl] ; c1x6 (screen X pos) - add e ; add X delta - cp $90 ; if value is >$90, the destination is off screen (either $91 or $FF underflow) - jr nc, .impassable ; don't walk off screen - push de - push bc - call Func_4c70 - pop bc - pop de - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $c - ld l, a - ld a, [hl] ; c1xc (forbidden directions flags(?)) - and b ; check against chosen direction (1,2,4 or 8) - jr nz, .impassable ; direction forbidden, don't go there - ld h, $c2 - ld a, [H_CURRENTSPRITEOFFSET] - add $2 - ld l, a - ld a, [hli] ; c2x2 (sprite Y displacement, initialized at $8, keep track of where a sprite did go) - bit 7, d ; check if going upwards (d=$ff) - jr nz, .upwards - add d - cp $5 - jr c, .impassable ; if c2x2+d < 5, don't go ;bug: this tests probably were supposed to prevent sprites - jr .checkHorizontal ; from walking out too far, but this line makes sprites get stuck -.upwards ; whenever they walked upwards 5 steps - sub $1 ; on the other hand, the amount a sprite can walk out to the - jr c, .impassable ; if d2x2 == 0, don't go ; right of bottom is not limited (until the counter overflows) -.checkHorizontal - ld d, a - ld a, [hl] ; c2x3 (sprite X displacement, initialized at $8, keep track of where a sprite did go) - bit 7, e ; check if going left (e=$ff) - jr nz, .left - add e - cp $5 ; compare, but no conditional jump like in the vertical check above (bug?) - jr .passable -.left - sub $1 - jr c, .impassable ; if d2x3 == 0, don't go -.passable - ld [hld], a ; update c2x3 - ld [hl], d ; update c2x2 - and a ; clear carry (marking success) - ret -.impassable - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - inc a - ld l, a - ld [hl], $2 ; c1x1 = 2 (set movement status to delayed) - inc l - inc l - xor a - ld [hli], a ; c1x3 = 0 (clear Y movement delta) - inc l - ld [hl], a ; c1x5 = 0 (clear X movement delta) - inc h - ld a, [H_CURRENTSPRITEOFFSET] - add $8 - ld l, a - call Random - ld a, [hRandomAdd] - and $7f - ld [hl], a ; c2x8: set next movement delay to a random value in [0,$7f] (again with delay $100 if value is 0) - scf ; set carry (marking failure to walk) - ret - -; calculates the tile pointer pointing to the tile the current sprite stancs on -; this is always the lower left tile of the 2x2 tile blocks all sprites are snapped to -; hl: output pointer -getTileSpriteStandsOn: ; 5207 (1:5207) - ld h, $c1 - ld a, [H_CURRENTSPRITEOFFSET] - add $4 - ld l, a - ld a, [hli] ; c1x4: screen Y position - add $4 ; align to 2*2 tile blocks (Y position is always off 4 pixels to the top) - and $f0 ; in case object is currently moving - srl a ; screen Y tile * 4 - ld c, a - ld b, $0 - inc l - ld a, [hl] ; c1x6: screen Y position - srl a - srl a - srl a ; screen X tile - add $14 ; screen X tile + 20 - ld d, $0 - ld e, a - ld hl, wTileMap - add hl, bc - add hl, bc - add hl, bc - add hl, bc - add hl, bc - add hl, de ; wTileMap + 20*(screen Y tile + 1) + screen X tile - ret - -; loads [de+a] into a -LoadDEPlusA: ; 522f (1:522f) - add e - ld e, a - jr nc, .noCarry - inc d -.noCarry - ld a, [de] - ret - -Func_5236: ; 5236 (1:5236) - ld a, [$d730] - bit 7, a - ret z - ld hl, $d72e - bit 7, [hl] - set 7, [hl] - jp z, Func_52a6 - ld hl, $cc97 - ld a, [$cd37] - add l - ld l, a - jr nc, .asm_5251 - inc h -.asm_5251 - ld a, [hl] - cp $40 - jr nz, .asm_525f - call Func_52b2 - ld c, $4 - ld a, $fe - jr .asm_5289 -.asm_525f - cp $0 - jr nz, .asm_526c - call Func_52b2 - ld c, $0 - ld a, $2 - jr .asm_5289 -.asm_526c - cp $80 - jr nz, .asm_5279 - call Func_52b7 - ld c, $8 - ld a, $fe - jr .asm_5289 -.asm_5279 - cp $c0 - jr nz, .asm_5286 - call Func_52b7 - ld c, $c - ld a, $2 - jr .asm_5289 -.asm_5286 - cp $ff - ret -.asm_5289 - ld b, a - ld a, [hl] - add b - ld [hl], a - ld a, [H_CURRENTSPRITEOFFSET] - add $9 - ld l, a - ld a, c - ld [hl], a - call Func_52c3 - ld hl, $cf18 - dec [hl] - ret nz - ld a, $8 - ld [$cf18], a - ld hl, $cd37 - inc [hl] - ret - -Func_52a6: ; 52a6 (1:52a6) - xor a - ld [$cd37], a - ld a, $8 - ld [$cf18], a - jp Func_52c3 - -Func_52b2: ; 52b2 (1:52b2) - ld a, $4 - ld b, a - jr asm_52ba - -Func_52b7: ; 52b7 (1:52b7) - ld a, $6 - ld b, a -asm_52ba: ; 52ba (1:52ba) - ld hl, wSpriteStateData1 - ld a, [H_CURRENTSPRITEOFFSET] - add l - add b - ld l, a - ret - -Func_52c3: ; 52c3 (1:52c3) - ld hl, wSpriteStateData2 - ld a, [H_CURRENTSPRITEOFFSET] - add $e - ld l, a - ld a, [hl] - dec a - swap a - ld b, a - ld hl, wSpriteStateData1 - ld a, [H_CURRENTSPRITEOFFSET] - add $9 - ld l, a - ld a, [hl] - cp $0 - jr z, .asm_52ea - cp $4 - jr z, .asm_52ea - cp $8 - jr z, .asm_52ea - cp $c - jr z, .asm_52ea - ret -.asm_52ea - add b - ld b, a - ld [$ffe9], a - call Func_5301 - ld hl, wSpriteStateData1 - ld a, [H_CURRENTSPRITEOFFSET] - add $2 - ld l, a - ld a, [$ffe9] - ld b, a - ld a, [$ffea] - add b - ld [hl], a - ret - -Func_5301: ; 5301 (1:5301) - ld a, [H_CURRENTSPRITEOFFSET] - add $7 - ld l, a - ld a, [hl] - inc a - ld [hl], a - cp $4 - ret nz - xor a - ld [hl], a - inc l - ld a, [hl] - inc a - and $3 - ld [hl], a - ld [$ffea], a - ret +INCLUDE "engine/overworld/movement.asm" INCLUDE "engine/cable_club.asm" |