/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

*/

#ifndef DOSISMS_H
#define DOSISMS_H

//
// dosisms.h: I'd call it dos.h, but the name's taken
//

int dos_lockmem(void *addr, int size);
int dos_unlockmem(void *addr, int size);

typedef union {
    struct {
	unsigned long edi;
	unsigned long esi;
	unsigned long ebp;
	unsigned long res;
	unsigned long ebx;
	unsigned long edx;
	unsigned long ecx;
	unsigned long eax;
    } d;
    struct {
	unsigned short di, di_hi;
	unsigned short si, si_hi;
	unsigned short bp, bp_hi;
	unsigned short res, res_hi;
	unsigned short bx, bx_hi;
	unsigned short dx, dx_hi;
	unsigned short cx, cx_hi;
	unsigned short ax, ax_hi;
	unsigned short flags;
	unsigned short es;
	unsigned short ds;
	unsigned short fs;
	unsigned short gs;
	unsigned short ip;
	unsigned short cs;
	unsigned short sp;
	unsigned short ss;
    } x;
    struct {
	unsigned char edi[4];
	unsigned char esi[4];
	unsigned char ebp[4];
	unsigned char res[4];
	unsigned char bl, bh, ebx_b2, ebx_b3;
	unsigned char dl, dh, edx_b2, edx_b3;
	unsigned char cl, ch, ecx_b2, ecx_b3;
	unsigned char al, ah, eax_b2, eax_b3;
    } h;
} regs_t;

unsigned int ptr2real(void *ptr);
void *real2ptr(unsigned int real);
void *far2ptr(unsigned int farptr);
unsigned int ptr2far(void *ptr);

int dos_inportb(int port);
int dos_inportw(int port);
void dos_outportb(int port, int val);
void dos_outportw(int port, int val);

void dos_irqenable(void);
void dos_irqdisable(void);
void dos_registerintr(int intr, void (*handler) (void));
void dos_restoreintr(int intr);

int dos_int86(int vec);

void *dos_getmemory(int size);
void dos_freememory(void *ptr);

void dos_usleep(int usecs);

int dos_getheapsize(void);

extern regs_t regs;

#endif /* DOSISMS_H */
