Add subdirectories to engine/ similar to pokecrystal

home/start_menu.asm

@@ -0,0 +1,85 @@
+DisplayStartMenu::
+	ld a, BANK(StartMenu_Pokedex)
+	ld [H_LOADEDROMBANK], a
+	ld [MBC1RomBank], a
+	ld a, [wWalkBikeSurfState] ; walking/biking/surfing
+	ld [wWalkBikeSurfStateCopy], a
+	ld a, SFX_START_MENU
+	call PlaySound
+
+RedisplayStartMenu::
+	callba DrawStartMenu
+	callba PrintSafariZoneSteps ; print Safari Zone info, if in Safari Zone
+	call UpdateSprites
+.loop
+	call HandleMenuInput
+	ld b, a
+.checkIfUpPressed
+	bit 6, a ; was Up pressed?
+	jr z, .checkIfDownPressed
+	ld a, [wCurrentMenuItem] ; menu selection
+	and a
+	jr nz, .loop
+	ld a, [wLastMenuItem]
+	and a
+	jr nz, .loop
+; if the player pressed tried to go past the top item, wrap around to the bottom
+	CheckEvent EVENT_GOT_POKEDEX
+	ld a, 6 ; there are 7 menu items with the pokedex, so the max index is 6
+	jr nz, .wrapMenuItemId
+	dec a ; there are only 6 menu items without the pokedex
+.wrapMenuItemId
+	ld [wCurrentMenuItem], a
+	call EraseMenuCursor
+	jr .loop
+.checkIfDownPressed
+	bit 7, a
+	jr z, .buttonPressed
+; if the player pressed tried to go past the bottom item, wrap around to the top
+	CheckEvent EVENT_GOT_POKEDEX
+	ld a, [wCurrentMenuItem]
+	ld c, 7 ; there are 7 menu items with the pokedex
+	jr nz, .checkIfPastBottom
+	dec c ; there are only 6 menu items without the pokedex
+.checkIfPastBottom
+	cp c
+	jr nz, .loop
+; the player went past the bottom, so wrap to the top
+	xor a
+	ld [wCurrentMenuItem], a
+	call EraseMenuCursor
+	jr .loop
+.buttonPressed ; A, B, or Start button pressed
+	call PlaceUnfilledArrowMenuCursor
+	ld a, [wCurrentMenuItem]
+	ld [wBattleAndStartSavedMenuItem], a ; save current menu selection
+	ld a, b
+	and %00001010 ; was the Start button or B button pressed?
+	jp nz, CloseStartMenu
+	call SaveScreenTilesToBuffer2 ; copy background from wTileMap to wTileMapBackup2
+	CheckEvent EVENT_GOT_POKEDEX
+	ld a, [wCurrentMenuItem]
+	jr nz, .displayMenuItem
+	inc a ; adjust position to account for missing pokedex menu item
+.displayMenuItem
+	cp 0
+	jp z, StartMenu_Pokedex
+	cp 1
+	jp z, StartMenu_Pokemon
+	cp 2
+	jp z, StartMenu_Item
+	cp 3
+	jp z, StartMenu_TrainerInfo
+	cp 4
+	jp z, StartMenu_SaveReset
+	cp 5
+	jp z, StartMenu_Option
+
+; EXIT falls through to here
+CloseStartMenu::
+	call Joypad
+	ld a, [hJoyPressed]
+	bit 0, a ; was A button newly pressed?
+	jr nz, CloseStartMenu
+	call LoadTextBoxTilePatterns
+	jp CloseTextDisplay