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ファミコンアセンブリ入門

 ファミコンアセンブリ入門

Here I gave a small introduction to programming in assembly for the NES emulator fceux.

Daniel Sangorrin

March 28, 2018
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  1. ファミコンアセンブリ入門
    Daniel Sangorrin ( ダニエル )
    @daromart
    @daromart
    東海道らぐ横浜の集い 2018 桜舞う巻
    2018/03/24

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  2. Architecture Reference

    http://nesdev.com/

    http://hp.vector.co.jp/authors/VA042397/inde
    x.html

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  3. 6502 アセンブリ
    https://skilldrick.github.io/easy6502/
    LDX #0 ; X will be the pixel index
    LDA #3 ; A will contain the color
    FIRST:
    STA $0200,X
    INX
    CPX #255
    BCC FIRST
    STA $02FF
    LDX #0
    LDA #4
    SECOND:
    STA $0300,X
    INX
    CPX #255
    BCC SECOND
    STA $03FF
    LDX #0
    LDA #5
    THIRD:
    STA $0400,X
    INX
    CPX #255
    BCC THIRD
    STA $04FF
    LDX #0
    LDA #6
    FOURTH:
    STA $0500,X
    INX
    CPX #255
    BCC FOURTH
    STA $05FF

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  4. Assembly Reference

    https://nesdoug.com/

    https://en.wikibooks.org/wiki/6502_Assembl
    y

    https://timcheeseman.com/nesdev

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  5. WINE + FCEUX

    Fceux available in Linux

    But no debug functionality

    WINE to run the Win32 version
    $ sudo dpkg --add-architecture i386
    $ wget -nc https://dl.winehq.org/wine-builds/Release.key
    $ sudo apt-key add Release.key
    $ sudo apt-add-repository https://dl.winehq.org/wine-
    builds/ubuntu/
    $ sudo apt-get update
    $ sudo apt-get install --install-recommends winehq-stable
    [Alt] sudo apt-get install --install-recommends winehq-devel
    $ wine fceux xxx.nes

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  6. cc65

    Install the cc65 compiler
    $ git clone https://github.com/cc65/cc65.git
    $ cd cc65
    $ make
    $ sudo make install PREFIX=/usr
    $ which cc65
    /usr/bin/cc65 <- C compiler
    $ which ca65
    /usr/bin/ca65 <- ASM compiler

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  7. Hello World
    $ git clone https://github.com/cirla/nesdev.git
    $ cd nesdev
    $ git checkout hello_world
    $ ls
    reset.s: initialization of the NES
    hello_world.c: contains main called from reset.s
    hello_world.cfg: linker script (describes the CPU memory map used)
    sprites.chr: file with sprites (Bitmap ROM)
    $ make
    -> hello_world.nes
    $ wine fceux.exe hello_world.nes
    -> shows a hello world

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