mirror of
https://github.com/iaddis/metalnes.git
synced 2024-05-20 05:00:59 -04:00
93 lines
1.4 KiB
ArmAsm
93 lines
1.4 KiB
ArmAsm
; Builds program as iNES ROM
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; Default is 32K PRG and 8K CHR ROM, NROM (0)
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.if 0 ; Options to set before .include "shell.inc":
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CHR_RAM=1 ; Use CHR-RAM instead of CHR-ROM
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CART_WRAM=1 ; Use mapper that supports 8K WRAM in cart
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CUSTOM_MAPPER=n ; Specify mapper number
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.endif
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.ifndef CUSTOM_MAPPER
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.ifdef CART_WRAM
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CUSTOM_MAPPER = 2 ; UNROM
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.else
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CUSTOM_MAPPER = 0 ; NROM
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.endif
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.endif
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;;;; iNES header
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.ifndef CUSTOM_HEADER
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.segment "HEADER"
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.byte $4E,$45,$53,26 ; "NES" EOF
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.ifdef CHR_RAM
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.byte 2,0 ; 32K PRG, CHR RAM
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.else
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.byte 2,1 ; 32K PRG, 8K CHR
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.endif
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.byte CUSTOM_MAPPER*$10+$01 ; vertical mirroring
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.endif
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.ifndef CUSTOM_VECTORS
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.segment "VECTORS"
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.word -1,-1,-1, nmi, reset, irq
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.endif
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;;;; CHR-RAM/ROM
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.ifdef CHR_RAM
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.define CHARS "CHARS_PRG"
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.segment CHARS
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ascii_chr:
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.segment "CHARS_PRG_ASCII"
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.align $200
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.incbin "ascii.chr"
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ascii_chr_end:
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.else
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.define CHARS "CHARS"
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.segment "CHARS_ASCII"
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.align $200
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.incbin "ascii.chr"
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.res $1800
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.endif
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.segment CHARS
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.res $10,0
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;;;; Shell
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.ifndef NEED_CONSOLE
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NEED_CONSOLE=1
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.endif
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.segment "CODE"
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.res $4000
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.include "shell.s"
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std_reset:
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lda #0
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sta PPUCTRL
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sta PPUMASK
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jmp run_shell
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init_runtime:
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.ifdef CHR_RAM
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load_chr_ram
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.endif
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rts
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post_exit:
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jsr set_final_result
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jsr play_hex
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jmp forever
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; This helps devcart recover after running test.
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; It is never executed by test ROM.
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.segment "LOADER"
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.incbin "devcart.bin"
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.code
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.align 256
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