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/*

** Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954

**

** This file is distributed under the terms listed in the document

** "copying.dj", available from DJ Delorie at the address above.

** A copy of "copying.dj" should accompany this file; if not, a copy

** should be available from where this file was obtained.  This file

** may not be distributed without a verbatim copy of "copying.dj".

**

** This file is distributed WITHOUT ANY WARRANTY; without even the implied

** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

**

** Modified by J. Alan Eldridge, Liberty Brokerage, 77 Water St, NYC 10005

**

**    added getxkey(), which can read extended keystrokes that start with

**    0xE0, as well as those which start with 0x00

**

**    added global char ScreenAttrib, the attribute used by ScreenClear():

**    it defaults to 0x07 so as not to break existing code.

**

**    added ScreenMode(), to return the current video mode

*/

#ifndef _PC_H_

#define _PC_H_

#ifdef __cplusplus

extern "C" {

#endif

unsigned char inportb(unsigned short port);

unsigned short inportw(unsigned short port);

unsigned long inportl(unsigned short port);

unsigned char inportsb(unsigned short port, unsigned char *buf, unsigned len);

unsigned short inportsw(unsigned short port, unsigned short *buf, unsigned len);

unsigned long inportsl(unsigned short port, unsigned long *buf, unsigned len);

void outportb(unsigned short port, unsigned char data);

void outportw(unsigned short port, unsigned short data);

void outportl(unsigned short port, unsigned long data);

void outportsb(unsigned short port, unsigned char *buf, unsigned len);

void outportsw(unsigned short port, unsigned short *buf, unsigned len);

void outportsl(unsigned short port, unsigned long *buf, unsigned len);

int kbhit(void);

int getkey(void); /* ALT's have 0x100 set */

int getxkey(void); /* ALT's have 0x100 set, 0xe0 sets 0x200 */

void sound(int frequency);

#define nosound() sound(0)

extern unsigned char ScreenAttrib;

extern short *ScreenPrimary;

extern short *ScreenSecondary;

/* For the primary screen: */

int ScreenMode(void);

int ScreenRows(void);

int ScreenCols(void);

void ScreenPutChar(int ch, int attr, int x, int y);

void ScreenSetCursor(int row, int col);

void ScreenGetCursor(int *row, int *col);

void ScreenClear(void);

void ScreenUpdate(void *virtual_screen);

void ScreenUpdateLine(void *virtual_screen_line, int row);

void ScreenRetrieve(void *virtual_screen);

#ifdef __cplusplus

}

#endif

#endif