Plan 9 from Bell Labs’s /usr/web/sources/contrib/aiju/nes/ppu.h
#ifndef PPU_H #define PPU_H byte ppuread(word addr); void ppuwrite(word addr, byte val); void ppuadvance(void); void oamfill(byte b); void drawpixel(int x, int y, int c); void updatedisplay(void); extern byte oammem[256]; #endif