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.

Transcript

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
3. Architecture Reference • http://nesdev.com/ • http://hp.vector.co.jp/authors/VA042397/inde x.html
4. 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
5. Assembly Reference • https://nesdoug.com/ • https://en.wikibooks.org/wiki/6502_Assembl y • https://timcheeseman.com/nesdev
6. 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
7. 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
8. 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