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Code Issues Packages Projects Releases Wiki Activity

Miscellaneous fixes, including one for the Pokédex design flaw by ax6

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This commit is contained in:
Rangi 2020-04-18 17:31:51 -04:00
parent ceb747c622
commit 576cbf5b3e
8 changed files with 182 additions and 27 deletions
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38
docs/bugs_and_glitches.md
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@ -78,6 +78,7 @@ Some fixes are mentioned as breaking compatibility with link battles. This can b
- [`LoadSpriteGFX` does not limit the capacity of `UsedSprites`](#loadspritegfx-does-not-limit-the-capacity-of-usedsprites)
- [`ChooseWildEncounter` doesn't really validate the wild Pokémon species](#choosewildencounter-doesnt-really-validate-the-wild-pokémon-species)
- [`TryObjectEvent` arbitrary code execution](#tryobjectevent-arbitrary-code-execution)
- [`ReadObjectEvents` overflows into `wObjectMasks`](#readobjectevents-overflows-into-wobjectmasks)
- [`ClearWRAM` only clears WRAM bank 1](#clearwram-only-clears-wram-bank-1)
- [`BattleAnimCmd_ClearObjs` only clears the first 6⅔ objects](#battleanimcmd_clearobjs-only-clears-the-first-6-objects)
@ -341,7 +342,7 @@ As Pryce's dialog ("That BADGE will raise the SPECIAL stats of POKéMON.") impli
call GetBattleVarAddr
push af
set SUBSTATUS_CONFUSED, [hl]
+ ld a, [hBattleTurn]
+ ldh a, [hBattleTurn]
+ and a
+ ld hl, wEnemyConfuseCount
+ jr z, .set_confuse_count
@ -349,7 +350,7 @@ As Pryce's dialog ("That BADGE will raise the SPECIAL stats of POKéMON.") impli
+.set_confuse_count
+ call BattleRandom
+ and %11
+ add a, 2
+ add 2
+ ld [hl], a
ld a, BATTLE_VARS_MOVE_ANIM
call GetBattleVarAddr
@ -2145,6 +2146,39 @@ This supports up to six entries.
```
## `ReadObjectEvents` overflows into `wObjectMasks`
**Fix:** Edit `ReadObjectEvents` in [home/map.asm](https://github.com/pret/pokecrystal/blob/master/home/map.asm):
```diff
-; get NUM_OBJECTS - [wCurMapObjectEventCount]
+; get NUM_OBJECTS - [wCurMapObjectEventCount] - 1
ld a, [wCurMapObjectEventCount]
ld c, a
- ld a, NUM_OBJECTS ; - 1
+ ld a, NUM_OBJECTS - 1
sub c
jr z, .skip
- ; jr c, .skip
+ jr c, .skip
; could have done "inc hl" instead
ld bc, 1
add hl, bc
-; Fill the remaining sprite IDs and y coords with 0 and -1, respectively.
-; Bleeds into wObjectMasks due to a bug. Uncomment the above code to fix.
ld bc, MAPOBJECT_LENGTH
.loop
ld [hl], 0
inc hl
ld [hl], -1
dec hl
add hl, bc
dec a
jr nz, .loop
```
## `ClearWRAM` only clears WRAM bank 1
**Fix:** Edit `ClearWRAM` in [home/init.asm](https://github.com/pret/pokecrystal/blob/master/home/init.asm):

119
docs/design_flaws.md
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@ -513,7 +513,124 @@ PokedexShow_GetDexEntryBank:
db BANK("Pokedex Entries 193-251")
```
**Fix:** Use `dba` instead of `dw` in `PokedexDataPointerTable`. Then edit [home.asm](https://github.com/pret/pokecrystal/blob/master/home.asm) to contain a single copy of the `PokedexDataPointerTable` lookup code, updated to work with 3-byte `dba` entries and get the bank from the first entry byte. Delete the three separate lookup routines and use the new one (placed in [home.asm](https://github.com/pret/pokecrystal/blob/master/home.asm) so it can be called from any bank.)
**Fix:**
Use `dba` instead of `dw` in `PokedexDataPointerTable`.
Delete `GetPokedexEntryBank` and `PokedexShow_GetDexEntryBank`. You can also delete `NUM_DEX_ENTRY_BANKS` from [constants/pokemon_data_constants.asm](https://github.com/pret/pokecrystal/blob/master/constants/pokemon_data_constants.asm).
Edit [engine/pokedex/pokedex_2.asm](https://github.com/pret/pokecrystal/blob/master/engine/pokedex/pokedex_2.asm):
```diff
GetDexEntryPointer:
; return dex entry pointer b:de
push hl
ld hl, PokedexDataPointerTable
ld a, b
dec a
ld d, 0
ld e, a
add hl, de
add hl, de
- ld e, [hl]
- inc hl
- ld d, [hl]
- push de
- rlca
- rlca
- maskbits NUM_DEX_ENTRY_BANKS
- ld hl, .PokedexEntryBanks
- ld d, 0
- ld e, a
- add hl, de
- ld b, [hl]
- pop de
+ add hl, de
+ ; b = bank
+ ld a, [hli]
+ ld b, a
+ ; de = address
+ ld a, [hli]
+ ld e, a
+ ld d, [hl]
pop hl
ret
-
-.PokedexEntryBanks:
- db BANK("Pokedex Entries 001-064")
- db BANK("Pokedex Entries 065-128")
- db BANK("Pokedex Entries 129-192")
- db BANK("Pokedex Entries 193-251")
```
Edit [engine/items/item_effects.asm](https://github.com/pret/pokecrystal/blob/master/engine/items/item_effects.asm):
```diff
HeavyBallMultiplier:
; subtract 20 from catch rate if weight < 102.4 kg
; else add 0 to catch rate if weight < 204.8 kg
; else add 20 to catch rate if weight < 307.2 kg
; else add 30 to catch rate if weight < 409.6 kg
; else add 40 to catch rate (never happens)
ld a, [wEnemyMonSpecies]
ld hl, PokedexDataPointerTable
dec a
ld e, a
ld d, 0
add hl, de
add hl, de
+ add hl, de
+ ; d = bank, hl = address
+ ld a, BANK(PokedexDataPointerTable)
+ call GetFarByte
+ push af
+ inc hl
ld a, BANK(PokedexDataPointerTable)
call GetFarHalfword
+ pop de
.SkipText:
- call GetPokedexEntryBank
+ ld a, d
call GetFarByte
inc hl
cp "@"
jr nz, .SkipText
- call GetPokedexEntryBank
+ ld a, d
push bc
inc hl
inc hl
call GetFarHalfword
```
And edit [engine/pokegear/radio.asm](https://github.com/pret/pokecrystal/blob/master/engine/pokegear/radio.asm):
```diff
PokedexShow2:
ld a, [wCurPartySpecies]
dec a
ld hl, PokedexDataPointerTable
ld c, a
ld b, 0
add hl, bc
add hl, bc
+ add hl, bc
+ b = bank
+ ld a, BANK(PokedexDataPointerTable)
+ call GetFarByte
+ ld b, a
+ inc hl
+ ; hl = address
ld a, BANK(PokedexDataPointerTable)
call GetFarHalfword
- call PokedexShow_GetDexEntryBank
+ ld a, b
push af
push hl
call CopyDexEntryPart1
```
## Identical sine wave code and data is repeated five times

4
engine/gfx/sprites.asm
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@ -318,7 +318,7 @@ AddOrSubtractY:
ld hl, wCurSpriteOAMFlags
bit OAM_Y_FLIP, [hl]
jr z, .ok
; 8 - a
; -8 - a
add $8
xor $ff
inc a
@ -333,7 +333,7 @@ AddOrSubtractX:
ld hl, wCurSpriteOAMFlags
bit OAM_X_FLIP, [hl]
jr z, .ok
; 8 - a
; -8 - a
add $8
xor $ff
inc a

28
engine/overworld/map_objects.asm
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@ -2318,7 +2318,7 @@ Function56cd:
jr c, .ok3
sub BG_MAP_WIDTH
.ok3
ldh [hUsedSpriteIndex], a
ldh [hCurSpriteXCoord], a
ld a, [wPlayerBGMapOffsetY]
ld e, a
ld hl, OBJECT_SPRITE_Y_OFFSET
@ -2347,7 +2347,7 @@ Function56cd:
jr c, .ok6
sub BG_MAP_HEIGHT
.ok6
ldh [hUsedSpriteTile], a
ldh [hCurSpriteYCoord], a
ld hl, OBJECT_PALETTE
add hl, bc
bit BIG_OBJECT_F, [hl]
@ -2360,18 +2360,18 @@ Function56cd:
ld e, a
.ok7
ld a, d
ldh [hFFBF], a
ldh [hCurSpriteXPixel], a
.loop
ldh a, [hFFBF]
ldh a, [hCurSpriteXPixel]
ld d, a
ldh a, [hUsedSpriteTile]
ldh a, [hCurSpriteYCoord]
add e
dec a
cp SCREEN_HEIGHT
jr nc, .ok9
ld b, a
.next
ldh a, [hUsedSpriteIndex]
ldh a, [hCurSpriteXCoord]
add d
dec a
cp SCREEN_WIDTH
@ -2856,7 +2856,7 @@ InitSprites:
add hl, bc
ld a, [hl]
and $ff ^ (1 << 7)
ldh [hFFC1], a
ldh [hCurSpriteTile], a
xor a
bit 7, [hl]
jr nz, .skip1
@ -2885,7 +2885,7 @@ InitSprites:
jr z, .skip4
or PRIORITY
.skip4
ldh [hFFC2], a
ldh [hCurSpriteOAMFlags], a
ld hl, OBJECT_SPRITE_X
add hl, bc
ld a, [hl]
@ -2896,7 +2896,7 @@ InitSprites:
ld e, a
ld a, [wPlayerBGMapOffsetX]
add e
ldh [hFFBF], a
ldh [hCurSpriteXPixel], a
ld hl, OBJECT_SPRITE_Y
add hl, bc
ld a, [hl]
@ -2907,7 +2907,7 @@ InitSprites:
ld e, a
ld a, [wPlayerBGMapOffsetY]
add e
ldh [hFFC0], a
ldh [hCurSpriteYPixel], a
ld hl, OBJECT_FACING_STEP
add hl, bc
ld a, [hl]
@ -2932,19 +2932,19 @@ InitSprites:
cp LOW(wVirtualOAMEnd)
jr nc, .full
.addsprite
ldh a, [hFFC0]
ldh a, [hCurSpriteYPixel]
add [hl]
inc hl
ld [bc], a ; y
inc c
ldh a, [hFFBF]
ldh a, [hCurSpriteXPixel]
add [hl]
inc hl
ld [bc], a ; x
inc c
ld e, [hl]
inc hl
ldh a, [hFFC1]
ldh a, [hCurSpriteTile]
bit ABSOLUTE_TILE_ID_F, e
jr z, .nope1
xor a
@ -2956,7 +2956,7 @@ InitSprites:
ld a, e
bit RELATIVE_ATTRIBUTES_F, a
jr z, .nope2
ldh a, [hFFC2]
ldh a, [hCurSpriteOAMFlags]
or e
.nope2
and OBP_NUM | X_FLIP | Y_FLIP | PRIORITY

3
home/map.asm
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@ -596,8 +596,7 @@ ReadObjectEvents::
ld bc, 1
add hl, bc
; Fill the remaining sprite IDs and y coords with 0 and -1, respectively.
; Bleeds into wObjectMasks due to a bug. Uncomment the above subtraction
; to fix.
; Bleeds into wObjectMasks due to a bug. Uncomment the above code to fix.
ld bc, MAPOBJECT_LENGTH
.loop
ld [hl], 0

13
hram.asm
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@ -95,12 +95,17 @@ NEXTU ; ffb3
hMGStatusFlags:: db ; ffbc
ENDU ; ffbd
UNION
hUsedSpriteIndex:: db ; ffbd
hUsedSpriteTile:: db ; ffbe
hFFBF:: db ; ffbf
hFFC0:: db ; ffc0
hFFC1:: db ; ffc1
hFFC2:: db ; ffc2
NEXTU
hCurSpriteXCoord:: db ; ffbd
hCurSpriteYCoord:: db ; ffbe
hCurSpriteXPixel:: db ; ffbf
hCurSpriteYPixel:: db ; ffc0
hCurSpriteTile:: db ; ffc1
hCurSpriteOAMFlags:: db ; ffc2
ENDU
UNION ; ffc3
hMoneyTemp:: ds 3 ; ffc3