/*
*	Dos Protected Mode Interface (DPMI) routines.
*	See Intel/Microsoft DPMI 1.0 spec for explanations.
*	Also PC Magazine, June 25, 1991, Lab Notes.
*/

#pragma pack(1)

typedef struct {
	unsigned long edi, esi, ebp, res1, ebx, edx, ecx, eax;
	unsigned flags, es, ds, fs, gs, ip, cs, sp, ss;
} RMODE_CALL;

typedef struct {
	unsigned limit, addr_lo;
	unsigned char addr_hi, access, res1, addr_xhi;
} DESCRIPTOR;

int		dpmi_rmode_intr(unsigned intr, unsigned flags,
			unsigned nwords, RMODE_CALL far *rmode_call);
unsigned	dpmi_sel(void);
int		dpmi_get_descriptor(unsigned pmodesel, DESCRIPTOR far *d);
int		dpmi_set_descriptor(unsigned pmodesel, DESCRIPTOR far *d);
void far	(*dpmi_make_callback(void far (*p)(), RMODE_CALL far *rc))();
int		dpmi_free_callback(void far (*p)());
unsigned	verw(unsigned sel);

unsigned	MapRealSeg(unsigned rpara, unsigned long size,
			unsigned far *psel);
void far *	ProtToReal(void far *prot);
void far *	map_real(void far *rptr, unsigned long size);
void		unmap_real(void far *p);

/* undocumented Windows functions */
DWORD FAR PASCAL	GetSelectorBase(unsigned sel);
DWORD FAR PASCAL	GetSelectorLimit(unsigned sel);
void FAR PASCAL		SetSelectorBase(unsigned sel, DWORD base);
void FAR PASCAL		SetSelectorLimit(unsigned sel, DWORD limit);