1#ifndef vgabios_h_included
2#define vgabios_h_included
3
4/* Types */
5typedef unsigned char  Bit8u;
6typedef unsigned short Bit16u;
7typedef unsigned long  Bit32u;
8typedef 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