Identify more flag bits

audio/engine_1.asm

@@ -15,9 +15,9 @@ Audio1_UpdateMusic::
 	ld a, [wMuteAudioAndPauseMusic]
 	and a
 	jr z, .applyAffects
-	bit 7, a
+	bit BIT_MUTE_AUDIO, a
 	jr nz, .nextChannel
-	set 7, a
+	set BIT_MUTE_AUDIO, a
 	ld [wMuteAudioAndPauseMusic], a
 	xor a ; disable all channels' output
 	ldh [rNR51], a
@@ -197,7 +197,7 @@ Audio1_sound_ret:
 .dontDisable
 	jr .afterDisable
 .returnFromCall
-	res 1, [hl]
+	res BIT_SOUND_CALL, [hl]
 	ld d, $0
 	ld a, c
 	add a
@@ -377,8 +377,8 @@ Audio1_toggle_perfect_pitch:
 	ld hl, wChannelFlags1
 	add hl, bc
 	ld a, [hl]
-	xor $1
-	ld [hl], a ; flip bit 0 of wChannelFlags1
+	xor 1 << BIT_PERFECT_PITCH
+	ld [hl], a
 	jp Audio1_sound_ret
 
 Audio1_vibrato:

audio/engine_2.asm

@@ -17,9 +17,9 @@ Audio2_UpdateMusic::
 	ld a, [wMuteAudioAndPauseMusic]
 	and a
 	jr z, .applyAffects
-	bit 7, a
+	bit BIT_MUTE_AUDIO, a
 	jr nz, .nextChannel
-	set 7, a
+	set BIT_MUTE_AUDIO, a
 	ld [wMuteAudioAndPauseMusic], a
 	xor a ; disable all channels' output
 	ldh [rNR51], a
@@ -163,8 +163,8 @@ Audio2_PlayNextNote:
 	ld a, c
 	cp CHAN5
 	jr nz, .beginChecks
-	ld a, [wLowHealthAlarm] ; low health alarm enabled?
-	bit 7, a
+	ld a, [wLowHealthAlarm]
+	bit BIT_LOW_HEALTH_ALARM, a
 	ret nz
 .beginChecks
 	; ---
@@ -208,7 +208,7 @@ Audio2_sound_ret:
 .dontDisable
 	jr .afterDisable
 .returnFromCall
-	res 1, [hl]
+	res BIT_SOUND_CALL, [hl]
 	ld d, $0
 	ld a, c
 	add a
@@ -388,8 +388,8 @@ Audio2_toggle_perfect_pitch:
 	ld hl, wChannelFlags1
 	add hl, bc
 	ld a, [hl]
-	xor $1
-	ld [hl], a ; flip bit 0 of wChannelFlags1
+	xor 1 << BIT_PERFECT_PITCH
+	ld [hl], a
 	jp Audio2_sound_ret
 
 Audio2_vibrato:
@@ -978,7 +978,7 @@ Audio2_ResetCryModifiers:
 	cp CHAN5
 	jr nz, .skip
 	ld a, [wLowHealthAlarm]
-	bit 7, a
+	bit BIT_LOW_HEALTH_ALARM, a
 	jr z, .skip
 	xor a
 	ld [wFrequencyModifier], a

audio/engine_3.asm

@@ -15,9 +15,9 @@ Audio3_UpdateMusic::
 	ld a, [wMuteAudioAndPauseMusic]
 	and a
 	jr z, .applyAffects
-	bit 7, a
+	bit BIT_MUTE_AUDIO, a
 	jr nz, .nextChannel
-	set 7, a
+	set BIT_MUTE_AUDIO, a
 	ld [wMuteAudioAndPauseMusic], a
 	xor a ; disable all channels' output
 	ldh [rNR51], a
@@ -197,7 +197,7 @@ Audio3_sound_ret:
 .dontDisable
 	jr .afterDisable
 .returnFromCall
-	res 1, [hl]
+	res BIT_SOUND_CALL, [hl]
 	ld d, $0
 	ld a, c
 	add a
@@ -377,8 +377,8 @@ Audio3_toggle_perfect_pitch:
 	ld hl, wChannelFlags1
 	add hl, bc
 	ld a, [hl]
-	xor $1
-	ld [hl], a ; flip bit 0 of wChannelFlags1
+	xor 1 << BIT_PERFECT_PITCH
+	ld [hl], a
 	jp Audio3_sound_ret
 
 Audio3_vibrato:

audio/low_health_alarm.asm

@@ -1,12 +1,12 @@
 Music_DoLowHealthAlarm::
 	ld a, [wLowHealthAlarm]
-	cp $ff
+	cp DISABLE_LOW_HEALTH_ALARM
 	jr z, .disableAlarm
 
-	bit 7, a  ;alarm enabled?
-	ret z     ;nope
+	bit BIT_LOW_HEALTH_ALARM, a
+	ret z
 
-	and $7f   ;low 7 bits are the timer.
+	and LOW_HEALTH_TIMER_MASK
 	jr nz, .notToneHi ;if timer > 0, play low tone.
 
 	call .playToneHi
@@ -19,15 +19,15 @@ Music_DoLowHealthAlarm::
 	call .playToneLo ;actually set the sound registers.
 
 .noTone
-	ld a, $86
+	ld a, CRY_SFX_END
 	ld [wChannelSoundIDs + CHAN5], a ;disable sound channel?
 	ld a, [wLowHealthAlarm]
-	and $7f ;decrement alarm timer.
+	and LOW_HEALTH_TIMER_MASK
 	dec a
 
 .resetTimer
 	; reset the timer and enable flag.
-	set 7, a
+	set BIT_LOW_HEALTH_ALARM, a
 	ld [wLowHealthAlarm], a
 	ret
 

constants/audio_constants.asm

@@ -66,3 +66,11 @@ DEF HW_CH4_DISABLE_MASK EQU (~HW_CH4_ENABLE_MASK & $ff)
 
 ; wChannelFlags2 constant (only has one flag)
 DEF BIT_EXECUTE_MUSIC EQU 0 ; if in execute music
+
+; wMuteAudioAndPauseMusic
+DEF BIT_MUTE_AUDIO EQU 7
+
+; wLowHealthAlarm
+DEF BIT_LOW_HEALTH_ALARM EQU 7
+DEF LOW_HEALTH_TIMER_MASK EQU %01111111
+DEF DISABLE_LOW_HEALTH_ALARM EQU $ff

constants/battle_constants.asm

@@ -72,6 +72,10 @@ DEF MAX_STAT_VALUE EQU 999
 DEF ATKDEFDV_TRAINER EQU $98
 DEF SPDSPCDV_TRAINER EQU $88
 
+; wDamageMultipliers
+DEF BIT_STAB_DAMAGE EQU 7
+DEF EFFECTIVENESS_MASK EQU %01111111
+
 ; wPlayerBattleStatus1 or wEnemyBattleStatus1 bit flags
 	const_def
 	const STORING_ENERGY           ; 0 ; Bide

constants/gfx_constants.asm

@@ -29,6 +29,12 @@ DEF TRANSFERBOTTOM EQU 2
 DEF REDRAW_COL EQU 1
 DEF REDRAW_ROW EQU 2
 
+; hUILayoutFlags
+	const_def
+	const BIT_PARTY_MENU_HP_BAR   ; 0
+	const BIT_DOUBLE_SPACED_MENU  ; 1
+	const BIT_SINGLE_SPACED_LINES ; 2
+
 ; tile list ids
 ; TileIDListPointerTable indexes (see data/tilemaps.asm)
 	const_def

constants/map_object_constants.asm

@@ -40,9 +40,16 @@ DEF SPRITESTATEDATA2_LENGTH EQU const_value
 
 DEF NUM_SPRITESTATEDATA_STRUCTS EQU 16
 
+	const_def 6
+	const BIT_TRAINER ; 6
+	const BIT_ITEM    ; 7
+
 ; different kinds of people events
-DEF ITEM    EQU $80
-DEF TRAINER EQU $40
+DEF TRAINER EQU 1 << BIT_TRAINER
+DEF ITEM    EQU 1 << BIT_ITEM
+
+; movement status
+DEF BIT_FACE_PLAYER EQU 7
 
 DEF WALK EQU $FE
 DEF STAY EQU $FF

constants/menu_constants.asm

@@ -44,6 +44,9 @@ DEF PC_ITEM_CAPACITY  EQU 50
 	const NO_YES_MENU       ; 7
 DEF NUM_TWO_OPTION_MENUS EQU const_value
 
+; wTwoOptionMenuID
+DEF BIT_SECOND_MENU_OPTION_DEFAULT EQU 7
+
 ; menu exit method constants for list menus and the buy/sell/quit menu
 DEF CHOSE_MENU_ITEM   EQU 1 ; pressed A
 DEF CANCELLED_MENU    EQU 2 ; pressed B

constants/oam_constants.asm

@@ -1,14 +1,20 @@
-; OAM flags used by this game
-DEF OAMFLAG_ENDOFDATA   EQU %00000001 ; pseudo OAM flag, only used by game logic
-DEF OAMFLAG_CANBEMASKED EQU %00000010 ; pseudo OAM flag, only used by game logic
+; Pseudo-OAM flags used by game logic
+	const_def
+	const BIT_END_OF_OAM_DATA    ; 0
+	const BIT_SPRITE_UNDER_GRASS ; 1
+
+; Used in SpriteFacingAndAnimationTable (see data/sprites/facings.asm)
+DEF FACING_END  EQU 1 << BIT_END_OF_OAM_DATA
+DEF UNDER_GRASS EQU 1 << BIT_SPRITE_UNDER_GRASS
 
 ; OAM attribute flags
-DEF OAM_PALETTE   EQU %111
-DEF OAM_TILE_BANK EQU 3
-DEF OAM_OBP_NUM   EQU 4 ; Non CGB Mode Only
-DEF OAM_X_FLIP    EQU 5
-DEF OAM_Y_FLIP    EQU 6
-DEF OAM_PRIORITY  EQU 7 ; 0: OBJ above BG, 1: OBJ behind BG (colors 1-3)
+DEF OAM_PALETTE EQU %111
+	const_def 3
+	const OAM_TILE_BANK ; 3
+	const OAM_OBP_NUM   ; 4 ; Non CGB Mode Only
+	const OAM_X_FLIP    ; 5
+	const OAM_Y_FLIP    ; 6
+	const OAM_PRIORITY  ; 7 ; 0: OBJ above BG, 1: OBJ behind BG (colors 1-3)
 
 ; OAM attribute masks
 DEF OAM_OBP1      EQU 1 << OAM_OBP_NUM  ; OBJ palette 1

constants/ram_constants.asm

@@ -1,3 +1,8 @@
+; wSlotMachineFlags
+	const_def 6
+	const BIT_SLOTS_CAN_WIN               ; 6
+	const BIT_SLOTS_CAN_WIN_WITH_7_OR_BAR ; 7
+
 ; wMiscFlags
 	const_def
 	const BIT_SEEN_BY_TRAINER      ; 0
@@ -9,6 +14,15 @@
 	const BIT_TRIED_PUSH_BOULDER   ; 6
 	const BIT_PUSHED_BOULDER       ; 7
 
+; wAutoTextBoxDrawingControl
+DEF BIT_NO_AUTO_TEXT_BOX EQU 0
+
+; wTextPredefFlag
+DEF BIT_TEXT_PREDEF EQU 0
+
+; wFontLoaded
+DEF BIT_FONT_LOADED EQU 0
+
 ; wOptions
 DEF TEXT_DELAY_MASK EQU %111
 	const_def 6
@@ -24,6 +38,12 @@ DEF TEXT_DELAY_SLOW   EQU %101 ; 5
 	const BIT_FAST_TEXT_DELAY ; 0
 	const BIT_TEXT_DELAY      ; 1
 
+; wCurMapTileset
+DEF BIT_NO_PREVIOUS_MAP EQU 7
+
+; wCurrentBoxNum
+DEF BIT_HAS_CHANGED_BOXES EQU 7
+
 ; wObtainedBadges, wBeatGymFlags
 	const_def
 	const BIT_BOULDERBADGE ; 0
@@ -117,3 +137,13 @@ DEF NUM_BADGES EQU const_value
 	const_skip 3               ; 3-5 ; unused
 	const BIT_LEDGE_OR_FISHING ; 6
 	const BIT_SPINNING         ; 7
+
+; hFindPathFlags
+	const_def
+	const BIT_PATH_FOUND_Y ; 0
+	const BIT_PATH_FOUND_X ; 1
+
+; hNPCPlayerRelativePosFlags
+	const_def
+	const BIT_PLAYER_LOWER_Y ; 0
+	const BIT_PLAYER_LOWER_X ; 1

data/sprites/facings.asm

@@ -48,12 +48,12 @@ SpriteFacingAndAnimationTable:
 	; y, x, attributes
 	db 0, 0, $00 ; top left
 	db 0, 8, $00 ; top right
-	db 8, 0, OAMFLAG_CANBEMASKED ; bottom left
-	db 8, 8, OAMFLAG_CANBEMASKED | OAMFLAG_ENDOFDATA ; bottom right
+	db 8, 0, UNDER_GRASS ; bottom left
+	db 8, 8, UNDER_GRASS | FACING_END ; bottom right
 
 .FlippedOAM:
 	; y, x, attributes
 	db 0, 8, OAM_HFLIP ; top left
 	db 0, 0, OAM_HFLIP ; top right
-	db 8, 8, OAM_HFLIP | OAMFLAG_CANBEMASKED ; bottom left
-	db 8, 0, OAM_HFLIP | OAMFLAG_CANBEMASKED | OAMFLAG_ENDOFDATA ; bottom right
+	db 8, 8, OAM_HFLIP | UNDER_GRASS ; bottom left
+	db 8, 0, OAM_HFLIP | UNDER_GRASS | FACING_END ; bottom right

engine/battle/animations.asm

@@ -114,13 +114,13 @@ DrawFrameBlock:
 	ld [de], a ; store tile ID
 	inc de
 	ld a, [hli]
-	bit 5, a ; is horizontal flip enabled?
+	bit OAM_X_FLIP, a
 	jr nz, .disableHorizontalFlip
 .enableHorizontalFlip
-	set 5, a
+	set OAM_X_FLIP, a
 	jr .storeFlags2
 .disableHorizontalFlip
-	res 5, a
+	res OAM_X_FLIP, a
 .storeFlags2
 	ld [de], a
 	inc de