Use input constants

engine/events.asm

@@ -875,10 +875,10 @@ CheckMenuOW: ; 96b30
 	ld [hMenuReturn + 1], a
 	ld a, [hJoyPressed]
 
-	bit 2, a ; SELECT
+	bit SELECT_F, a
 	jr nz, .Select
 
-	bit 3, a ; START
+	bit START_F, a
 	jr z, .NoMenu
 
 	ld a, BANK(StartMenuScript)

engine/mon_menu.asm

@@ -89,9 +89,9 @@ MonMenuLoop: ; 24d59
 	ld de, SFX_READ_TEXT_2
 	call PlaySFX
 	ld a, [hJoyPressed]
-	bit 0, a ; A
+	bit A_BUTTON_F, a
 	jr nz, .select
-	bit 1, a ; B
+	bit B_BUTTON_F, a
 	jr nz, .cancel
 	jr .loop
 

engine/scrolling_menu.asm

@@ -65,21 +65,21 @@ ScrollingMenuJoyAction: ; 24609
 	ld a, [hJoyPressed]
 	and BUTTONS
 	or b
-	bit 0, a ; A
+	bit A_BUTTON_F, a
 	jp nz, .a_button
-	bit 1, a ; B
+	bit B_BUTTON_F, a
 	jp nz, .b_button
-	bit 2, a ; Select
+	bit SELECT_F, a
 	jp nz, .select
-	bit 3, a ; Start
+	bit START_F, a
 	jp nz, .start
-	bit 4, a ; Right
+	bit D_RIGHT_F, a
 	jp nz, .d_right
-	bit 5, a ; Left
+	bit D_LEFT_F, a
 	jp nz, .d_left
-	bit 6, a ; Up
+	bit D_UP_F, a
 	jp nz, .d_up
-	bit 7, a ; Down
+	bit D_DOWN_F, a
 	jp nz, .d_down
 	jr .loop
 ; 24640

home.asm

@@ -332,7 +332,7 @@ PrintLetterDelay:: ; 313d
 	jr .updatedelay
 
 .fast
-	ld a, 1
+	ld a, TEXT_DELAY_FAST
 
 .updatedelay
 	ld [TextDelayFrames], a
@@ -347,11 +347,11 @@ PrintLetterDelay:: ; 313d
 
 ; Wait one frame if holding A or B.
 	ld a, [hJoyDown]
-	bit 0, a ; A_BUTTON
+	bit A_BUTTON_F, a
 	jr z, .checkb
 	jr .delay
 .checkb
-	bit 1, a ; B_BUTTON
+	bit B_BUTTON_F, a
 	jr z, .wait
 
 .delay