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|
; starting game!
start_game:
lda <KONAMI_CODE_STATE
cmp konami_code_length
beq .start_sound_alt
.if ENABLE_SOUND!=0
jsr start_sound
.endif
jmp .start_sound_end
.start_sound_alt:
jsr start_sound_alt
.start_sound_end:
jsr dim_base_palette_out
; disable PPU
lda #%00000000
sta PPUCTRL
lda #%00000000
sta PPUMASK
; wait for v-blank
jsr waitblank_simple
.if SECRETS>=3
; check for konami code
lda <KONAMI_CODE_STATE
cmp konami_code_length
bne .no_konami_code
lda #GAMES_COUNT & $FF
clc
adc #2
sta <SELECTED_GAME
lda #(GAMES_COUNT >> 8) & $FF
adc #0
sta <SELECTED_GAME+1
.no_konami_code:
.endif
lda SELECTED_GAME+1
jsr select_prg_bank
ldx SELECTED_GAME
lda loader_data_game_flags, x
and CONSOLE_TYPE
beq compatible_console
; not compatible console!
; error sound
jsr error_sound
; save state, without game save
lda #0
sta <LAST_STARTED_SAVE
jsr save_state
; print error message
jsr clear_screen
jsr load_text_attributes
lda #$21
sta PPUADDR
lda #$A0
sta PPUADDR
lda #LOW(string_incompatible_console)
sta <COPY_SOURCE_ADDR
lda #HIGH(string_incompatible_console)
sta <COPY_SOURCE_ADDR+1
jsr print_text
lda #%00001000
sta PPUCTRL
lda #%00001010
sta PPUMASK
; disable scrolling
inc SCROLL_LOCK
; dim-in
jsr dim_base_palette_in
; wait until all buttons released
.incompatible_print_wait_no_button:
jsr read_controller
lda <BUTTONS
bne .incompatible_print_wait_no_button
; tiny delay
ldx #15
.incompatible_wait:
jsr waitblank_simple
dex
bne .incompatible_wait
; wait until any button pressed
.incompatible_print_wait_button:
jsr read_controller
lda <BUTTONS
beq .incompatible_print_wait_button
jsr dim_base_palette_out
jmp Start
compatible_console:
; clear NTRAM
jsr enable_chr_write
jsr enable_four_screen
jsr clear_screen
; clear nametables
jsr disable_four_screen
jsr clear_screen
jsr disable_chr_write
; clear sprite data
jsr clear_sprites
; load this empty data
jsr sprite_dma_copy
; loading game settings
ldx <SELECTED_GAME
lda loader_data_reg_0, x
sta <LOADER_REG_0
lda loader_data_reg_1, x
sta <LOADER_REG_1
lda loader_data_reg_2, x
sta <LOADER_REG_2
lda loader_data_reg_3, x
sta <LOADER_REG_3
lda loader_data_reg_4, x
sta <LOADER_REG_4
lda loader_data_reg_5, x
sta <LOADER_REG_5
lda loader_data_reg_6, x
sta <LOADER_REG_6
lda loader_data_reg_7, x
sta <LOADER_REG_7
lda loader_data_chr_start_bank_h, x
sta <LOADER_CHR_START_H
lda loader_data_chr_start_bank_l, x
sta <LOADER_CHR_START_L
lda loader_data_chr_start_bank_s, x
sta <LOADER_CHR_START_S
lda loader_data_chr_count, x
sta <LOADER_CHR_LEFT
lda loader_data_game_save, x
sta <LOADER_GAME_SAVE
sta <LAST_STARTED_SAVE ; save ID of save
lda #2
sta <LOADER_GAME_SAVE_BANK
; loading battery backed save if need
jsr load_save
; saving state
jsr save_state
; first PRG bank
lda #0
jsr select_prg_bank
; loading tiles
jsr load_all_chr_banks
; wait for sound end and reset sound registers
jsr wait_sound_end
jsr reset_sound
; start loader stored into RAM
jmp loader
|
