--- /dev/null
+#ifndef vgabios_h_included
+#define vgabios_h_included
+
+/* Types */
+typedef unsigned char Bit8u;
+typedef unsigned short Bit16u;
+typedef unsigned long Bit32u;
+typedef unsigned short Boolean;
+
+/* Defines */
+
+#define SET_AL(val8) AX = ((AX & 0xff00) | (val8))
+#define SET_BL(val8) BX = ((BX & 0xff00) | (val8))
+#define SET_CL(val8) CX = ((CX & 0xff00) | (val8))
+#define SET_DL(val8) DX = ((DX & 0xff00) | (val8))
+#define SET_AH(val8) AX = ((AX & 0x00ff) | ((val8) << 8))
+#define SET_BH(val8) BX = ((BX & 0x00ff) | ((val8) << 8))
+#define SET_CH(val8) CX = ((CX & 0x00ff) | ((val8) << 8))
+#define SET_DH(val8) DX = ((DX & 0x00ff) | ((val8) << 8))
+
+#define GET_AL() ( AX & 0x00ff )
+#define GET_BL() ( BX & 0x00ff )
+#define GET_CL() ( CX & 0x00ff )
+#define GET_DL() ( DX & 0x00ff )
+#define GET_AH() ( AX >> 8 )
+#define GET_BH() ( BX >> 8 )
+#define GET_CH() ( CX >> 8 )
+#define GET_DH() ( DX >> 8 )
+
+#define SET_CF() FLAGS |= 0x0001
+#define CLEAR_CF() FLAGS &= 0xfffe
+#define GET_CF() (FLAGS & 0x0001)
+
+#define SET_ZF() FLAGS |= 0x0040
+#define CLEAR_ZF() FLAGS &= 0xffbf
+#define GET_ZF() (FLAGS & 0x0040)
+
+#define SCROLL_DOWN 0
+#define SCROLL_UP 1
+#define NO_ATTR 2
+#define WITH_ATTR 3
+
+#define SCREEN_SIZE(x,y) (((x*y*2)|0x00ff)+1)
+#define SCREEN_MEM_START(x,y,p) ((((x*y*2)|0x00ff)+1)*p)
+#define SCREEN_IO_START(x,y,p) ((((x*y)|0x00ff)+1)*p)
+
+#endif
