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304 lines
6.0 KiB
304 lines
6.0 KiB
2 years ago
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include "inc/constants.asm"
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;; Game specific constants
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; Game states
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STATE_MENU EQU %00000001
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STATE_GAME EQU %00000010
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STATE_LOST EQU %00000100
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STATE_WON EQU %00001100
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; Marker for invalid or undefined values
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NULL EQU $1c
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;; Indices of special tiles
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TILE_BLACK EQU $1a
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TILE_WHITE EQU $1b
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TILE_NULL EQU NULL
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TILE_PLACEHOLDER EQU $1d
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TILE_ENTER EQU $1e
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TILE_RIGHT EQU $1f
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TILE_MISPLACED EQU $20
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TILE_WRONG EQU $21
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; Vertical blanking interrupt starting address
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SECTION "ENTRY_VBLANK", ROM0[$0040]
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jp int_vblank
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; LCDC status interrupt starting address
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SECTION "ENTRY_LCDCS", ROM0[$0048]
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reti
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; Timer overflow interrupt starting address
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SECTION "ENTRY_TIMER", ROM0[$0050]
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jp int_timer
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; Serial transfer completion interrupt starting address
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SECTION "ENTRY_SERIAL", ROM0[$0058]
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reti
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; Program starting address
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SECTION "ENTRY_START", ROM0[$0100]
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jp main
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SECTION "MAIN", ROM0[$0150]
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main:
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; turn the screen off until everything is initialised
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ld a, DISPLAY_OFF
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ld [LCD_CONTROL_REGISTER], a
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ld [LCD_STATUS_REGISTER], a
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; set the stack pointer
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ld sp, INITIAL_STACK_POINTER
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; load the video data
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call init_palettes
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call load_tiles
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call load_window_map
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call load_background_map
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; initialise the objects
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call init_oam_copy
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call update_oam
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; initialise the game state
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call init_state_menu
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; enable specific interrupts
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ld a, INT_VBLANK_ON + INT_TIMER_ON
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ld [INTERRUPT_SETTINGS], a
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; configure the timer
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ld a, TIMER_START + TIMER_16KHZ
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ld [TIMER_SETTINGS], a
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; Every frame consists of the phases:
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; 1) The display will be updated.
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; Within this period we can't alter the graphics data.
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; We use this time to handle input and calculate stuff.
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; 2) The display was updated.
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; Now we have a limited time frame where we can update
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; all graphic related memory locations.
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main_loop:
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ld a, [vblank_flag]
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cp a, 0
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jp z, main_loop
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.within_vblank:
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call update_oam
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call read_input
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ld a, [current_state]
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.in_menu:
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cp a, STATE_MENU
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jp nz, .in_game
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call handle_input_menu
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jp .cleanup
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.in_game:
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cp a, STATE_GAME
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jp nz, .in_won
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call handle_input_game
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call update_hint_markings
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call update_guess_objects
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call update_cursor_objects
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jp .cleanup
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.in_won:
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cp a, STATE_WON
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jp nz, .in_lost
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call handle_input_after
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call update_hint_markings
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jp .cleanup
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.in_lost:
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cp a, STATE_LOST
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jp nz, .cleanup
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call handle_input_after
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call update_hint_markings
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jp .cleanup
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.cleanup:
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; reset vblank flag
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ld a, 0
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ld [vblank_flag], a
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call check_message_timeout
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jp main_loop
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include "inc/init.asm"
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include "inc/math.asm"
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include "inc/oam.asm"
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include "inc/dict.asm"
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include "inc/input.asm"
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include "inc/guess.asm"
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include "inc/hints.asm"
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include "inc/search.asm"
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include "inc/messages.asm"
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include "inc/wincondition.asm"
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include "inc/interrupts.asm"
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;; Game data
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SECTION "DATA0", ROM0[$1000]
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; Tiles
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tiles_start:
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tiles_alphabet:
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include "tiles/alphabet.asm"
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tile_black:
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include "tiles/plain-black.asm"
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tile_white:
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include "tiles/plain-white.asm"
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tile_null:
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include "tiles/plain-null.asm"
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tiles_placeholder:
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include "tiles/sign-placeholder.asm"
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tiles_enter:
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include "tiles/sign-enter.asm"
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tiles_right:
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include "tiles/sign-right.asm"
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tile_misplaced:
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include "tiles/sign-misplaced.asm"
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tiles_wrong:
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include "tiles/sign-wrong.asm"
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tiles_logo:
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include "tiles/logo.asm"
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tiles_end:
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; Maps
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maps_start:
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background:
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include "maps/background.asm"
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window:
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include "maps/window.asm"
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maps_end:
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dictionary:
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incbin "dict/en.dat"
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dictionary_end:
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DB
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; Messages
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message_clear:
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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DB $00, $00, $00, $00
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message_unknown:
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DB $7a, $38, 20, OBJ_ATTR_PALETTE1 ; U
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DB $7a, $40, 13, OBJ_ATTR_PALETTE1 ; N
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DB $7a, $48, 10, OBJ_ATTR_PALETTE1 ; k
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DB $7a, $50, 13, OBJ_ATTR_PALETTE1 ; N
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DB $7a, $58, 14, OBJ_ATTR_PALETTE1 ; O
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DB $7a, $60, 22, OBJ_ATTR_PALETTE1 ; W
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DB $7a, $68, 13, OBJ_ATTR_PALETTE1 ; N
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DB $00, $00, 0, 0
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message_won:
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DB $7a, $38, 24, OBJ_ATTR_PALETTE1 ; Y
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DB $7a, $40, 14, OBJ_ATTR_PALETTE1 ; O
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DB $7a, $48, 20, OBJ_ATTR_PALETTE1 ; U
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DB $7a, $58, 22, OBJ_ATTR_PALETTE1 ; W
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DB $7a, $60, 14, OBJ_ATTR_PALETTE1 ; O
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DB $7a, $68, 13, OBJ_ATTR_PALETTE1 ; N
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DB $00, $00, 0, 0
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DB $00, $00, 0, 0
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message_lost:
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DB $7a, $30, 8, OBJ_ATTR_PALETTE1 ; I
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DB $7a, $38, 19, OBJ_ATTR_PALETTE1 ; T
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DB $7a, $40, 18, OBJ_ATTR_PALETTE1 ; S
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DB $7a, $50, 0, OBJ_ATTR_PALETTE1 ; guess[0]
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DB $7a, $58, 0, OBJ_ATTR_PALETTE1 ; guess[1]
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DB $7a, $60, 0, OBJ_ATTR_PALETTE1 ; guess[2]
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DB $7a, $68, 0, OBJ_ATTR_PALETTE1 ; guess[3]
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DB $7a, $70, 0, OBJ_ATTR_PALETTE1 ; guess[4]
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; Address reservations within the working ram
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SECTION "RAM", WRAM0
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; The first 160 Bytes are reserved for a copy
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; of the OAM data, which will be updated via DMA.
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obj_start:
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obj_selected_letter:
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DS 4
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obj_guess_letters:
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DS 120
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obj_message_letters:
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DS 32
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obj_end:
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obj_dma_padding:
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DS 160 - (obj_end - obj_start)
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; Will be set to 1 after each vblank interrupt
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vblank_flag:
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DB
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; Saves the current 16bit random number
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random_number:
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DS 2
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; Saves the last keystate
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input_state:
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DB
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; Saves the current game state
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current_state:
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DB
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; Saves the current word
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current_word:
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DS 5
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; Number of the current guess
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current_guess:
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DB
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; Position within the current guess
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current_char:
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DB
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; The guess attempts
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guesses:
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DS 30
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; The corresponding hints
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guesses_hints:
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DS 30
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; Message timeout
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message_timeout:
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DB
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; Horizontal position of the letter selection
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selected_letter_x:
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DB
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; Vertical position of the letter selection
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selected_letter_y:
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DB
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