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 48