vgabios/vgabios.h

   1 #ifndef vgabios_h_included
   2 #define vgabios_h_included
   3
   4 /* Types */
   5 typedef unsigned char  Bit8u;
   6 typedef unsigned short Bit16u;
   7 typedef unsigned long  Bit32u;
   8 typedef unsigned short Boolean;
   9
  10 /* Defines */
  11
  12 #define SET_AL(val8) AX = ((AX & 0xff00) | (val8))
  13 #define SET_BL(val8) BX = ((BX & 0xff00) | (val8))
  14 #define SET_CL(val8) CX = ((CX & 0xff00) | (val8))
  15 #define SET_DL(val8) DX = ((DX & 0xff00) | (val8))
  16 #define SET_AH(val8) AX = ((AX & 0x00ff) | ((val8) << 8))
  17 #define SET_BH(val8) BX = ((BX & 0x00ff) | ((val8) << 8))
  18 #define SET_CH(val8) CX = ((CX & 0x00ff) | ((val8) << 8))
  19 #define SET_DH(val8) DX = ((DX & 0x00ff) | ((val8) << 8))
  20
  21 #define GET_AL() ( AX & 0x00ff )
  22 #define GET_BL() ( BX & 0x00ff )
  23 #define GET_CL() ( CX & 0x00ff )
  24 #define GET_DL() ( DX & 0x00ff )
  25 #define GET_AH() ( AX >> 8 )
  26 #define GET_BH() ( BX >> 8 )
  27 #define GET_CH() ( CX >> 8 )
  28 #define GET_DH() ( DX >> 8 )
  29
  30 #define SET_CF()     FLAGS |= 0x0001
  31 #define CLEAR_CF()   FLAGS &= 0xfffe
  32 #define GET_CF()     (FLAGS & 0x0001)
  33
  34 #define SET_ZF()     FLAGS |= 0x0040
  35 #define CLEAR_ZF()   FLAGS &= 0xffbf
  36 #define GET_ZF()     (FLAGS & 0x0040)
  37
  38 #define SCROLL_DOWN 0
  39 #define SCROLL_UP   1
  40 #define NO_ATTR     2
  41 #define WITH_ATTR   3
  42
  43 #define SCREEN_SIZE(x,y) (((x*y*2)|0x00ff)+1)
  44 #define SCREEN_MEM_START(x,y,p) ((((x*y*2)|0x00ff)+1)*p)
  45 #define SCREEN_IO_START(x,y,p) ((((x*y)|0x00ff)+1)*p)
  46
  47 #endif