scroll.h

十七种模拟器源代码 非常有用的作课程设计不可缺少的

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_1024x512_2_16(scr_x,scr_y) \
   zzz=(scr_x);                                \
   zzzz=(zzz&0x3F0)>>3;                        \
   x16=zzz&15;                                 \
   zzz=(scr_y);                                \
   zzzz|=(zzz&0x1F0)<<3;                       \
   y16=zzz&15;                                 \

#define START_SCROLL_1024x512_2_16		START_SCROLL_16
#define START_SCROLL_1024x512_2_16_R180		START_SCROLL_16_R180
#define START_SCROLL_1024x512_2_16_R270		START_SCROLL_16_R270

#define END_SCROLL_1024x512_2_16() \
      zz=(zz&0xF80)|((zz+2)&0x7F); \
   }                               \
   zz = zzzz = (zzzz+0x80)&0xFFF;  \
   }                               \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_1024x512_4_16(scr_x,scr_y) \
   zzz=(scr_x);                                \
   zzzz=(zzz&0x3F0)>>2;                        \
   x16=zzz&15;                                 \
   zzz=(scr_y);                                \
   zzzz|=(zzz&0x1F0)<<4;                       \
   y16=zzz&15;                                 \

#define START_SCROLL_1024x512_4_16		START_SCROLL_16
#define START_SCROLL_1024x512_4_16_R180		START_SCROLL_16_R180
#define START_SCROLL_1024x512_4_16_R270		START_SCROLL_16_R270

#define END_SCROLL_1024x512_4_16()  \
      zz=(zz&0x1F00)|((zz+4)&0xFF); \
   }                                \
   zz = zzzz = (zzzz+0x100)&0x1FFF; \
   }                                \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_1024x512_2_8(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x3F8)>>2;                       \
   x16=zzz&7;                                 \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x1F8)<<5;                      \
   y16=zzz&7;                                 \

#define START_SCROLL_1024x512_2_8		START_SCROLL_8
#define START_SCROLL_1024x512_2_8_R180		START_SCROLL_8_R180
#define START_SCROLL_1024x512_2_8_R270		START_SCROLL_8_R270

#define END_SCROLL_1024x512_2_8()   \
      zz=(zz&0x3F00)|((zz+2)&0xFF); \
   }                                \
   zz = zzzz = (zzzz+0x100)&0x3FFF; \
   }                                \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_512x256_4_16(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x1F0)>>2;                       \
   x16=zzz&15;                                \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x0F0)<<3;                      \
   y16=zzz&15;                                \

#define START_SCROLL_512x256_4_16		START_SCROLL_16
#define START_SCROLL_512x256_4_16_R180		START_SCROLL_16_R180
#define START_SCROLL_512x256_4_16_R270		START_SCROLL_16_R270

#define END_SCROLL_512x256_4_16()  \
      zz=(zz&0x780)|((zz+4)&0x7F); \
   }                               \
   zz = zzzz = (zzzz+0x80)&0x7FF;  \
   }                               \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_512x512_4_16(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x1F0)>>2;                       \
   x16=zzz&15;                                \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x1F0)<<3;                      \
   y16=zzz&15;                                \

#define START_SCROLL_512x512_4_16		START_SCROLL_16
#define START_SCROLL_512x512_4_16_R180		START_SCROLL_16_R180
#define START_SCROLL_512x512_4_16_R270		START_SCROLL_16_R270

#define END_SCROLL_512x512_4_16()  \
      zz=(zz&0xF80)|((zz+4)&0x7F); \
   }                               \
   zz = zzzz = (zzzz+0x80)&0xFFF;  \
   }                               \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_1024x512_4_8(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x3F8)>>1;                       \
   x16=zzz&7;                                 \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x1F8)<<6;                      \
   y16=zzz&7;                                 \

#define START_SCROLL_1024x512_4_8		START_SCROLL_8
#define START_SCROLL_1024x512_4_8_R180		START_SCROLL_8_R180
#define START_SCROLL_1024x512_4_8_R270		START_SCROLL_8_R270

#define END_SCROLL_1024x512_4_8()    \
      zz=(zz&0x7E00)|((zz+4)&0x1FF); \
   }                                 \
   zz = zzzz = (zzzz+0x200)&0x7FFF;  \
   }                                 \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_1024x256_2_8(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x3F8)>>2;                       \
   x16=zzz&7;                                 \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x0F8)<<5;                      \
   y16=zzz&7;                                 \

#define START_SCROLL_1024x256_2_8		START_SCROLL_8
#define START_SCROLL_1024x256_2_8_R180		START_SCROLL_8_R180
#define START_SCROLL_1024x256_2_8_R270		START_SCROLL_8_R270

#define END_SCROLL_1024x256_2_8()   \
      zz=(zz&0x1F00)|((zz+2)&0xFF); \
   }                                \
   zz = zzzz = (zzzz+0x100)&0x1FFF; \
   }                                \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_1024x256_4_8_YX(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x3F8)>>2;                       \
   x16=zzz&7;                                 \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x0F8)<<6;                      \
   y16=zzz&7;                                 \

#define START_SCROLL_1024x256_4_8_YX		START_SCROLL_8_YX

#define END_SCROLL_1024x256_4_8_YX() \
      zz=(zz&0x3F80)|((zz+4)&0x7F);  \
   }                                 \
   zz = zzzz = (zzzz+0x80)&0x3FFF;   \
   }                                 \

#define MAKE_SCROLL_2048x512_4_16_YX(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x7F0)>>3;                       \
   x16=zzz&15;                                 \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x1F0)<<5;                      \
   y16=zzz&15;                                 \

#define START_SCROLL_2048x512_4_16_YX		START_SCROLL_16_YX

#define END_SCROLL_2048x512_4_16_YX() \
      zz=(zz&0x3F80)|((zz+4)&0x7F);  \
   }                                 \
   zz = zzzz = (zzzz+0x80)&0x3FFF;   \
   }                                 \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_512x512_2_16(scr_x,scr_y) \
   zzz=(scr_x);                               \
   zzzz=(zzz&0x1F0)>>3;                       \
   x16=zzz&15;                                \
   zzz=(scr_y);                               \
   zzzz|=(zzz&0x1F0)<<2;                      \
   y16=zzz&15;                                \

#define START_SCROLL_512x512_2_16		START_SCROLL_16
#define START_SCROLL_512x512_2_16_R180		START_SCROLL_16_R180
#define START_SCROLL_512x512_2_16_R270		START_SCROLL_16_R270
#define START_SCROLL_512x512_2_16_FLIPY		START_SCROLL_16_FLIPY

#define END_SCROLL_512x512_2_16()   \
      zz=(zz&0x07C0)|((zz+2)&0x3F); \
   }                                \
   zz = zzzz = (zzzz+0x40)&0x07FF;  \
   }                                \

// -----------------------------------------------------------------------------

#define MAKE_SCROLL_512x1024_2_16(scr_x,scr_y) \
   zzz=(scr_x);                                \
   zzzz=(zzz&0x1F0)>>3;                        \
   x16=zzz&15;                                 \
   zzz=(scr_y);                                \
   zzzz|=(zzz&0x3F0)<<2;                       \
   y16=zzz&15;                                 \

#define START_SCROLL_512x1024_2_16		START_SCROLL_16
#define START_SCROLL_512x1024_2_16_R180		START_SCROLL_16_R180
#define START_SCROLL_512x1024_2_16_R270		START_SCROLL_16_R270
#define START_SCROLL_512x1024_2_16_FLIPY	START_SCROLL_16_FLIPY

#define END_SCROLL_512x1024_2_16()  \
      zz=(zz&0x0FC0)|((zz+2)&0x3F); \
   }                                \
   zz = zzzz = (zzzz+0x40)&0x0FFF;  \
   }                                \

// =============================================================================

#define MAKE_SCROLL_512x2048_2_16(scr_x,scr_y) \
   zzz=(scr_x);                                \
   zzzz=(zzz&0x1F0)>>3;                        \
   x16=zzz&15;                                 \
   zzz=(scr_y);                                \
   zzzz|=(zzz&0x7F0)<<2;                       \
   y16=zzz&15;                                 \

#define START_SCROLL_512x2048_2_16		START_SCROLL_16
#define START_SCROLL_512x2048_2_16_R180		START_SCROLL_16_R180
#define START_SCROLL_512x2048_2_16_R270		START_SCROLL_16_R270
#define START_SCROLL_512x2048_2_16_FLIPY	START_SCROLL_16_FLIPY

#define END_SCROLL_512x2048_2_16()  \
      zz=(zz&0x1FC0)|((zz+2)&0x3F); \
   }                                \
   zz = zzzz = (zzzz+0x40)&0x1FFF;  \
   }

// =============================================================================