com32/cmenu/libmenu/com32io.h

   1 /* -*- c -*- ------------------------------------------------------------- *
   2  *
   3  *   Copyright 2004-2005 Murali Krishnan Ganapathy - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 #ifndef __COM32IO_H__
  14 #define __COM32IO_H__
  15
  16 #include <com32.h>
  17 #include <stdio.h>
  18 #include <libansi.h>
  19
  20 #ifndef NULL
  21 #define NULL ((void *)0)
  22 #endif
  23
  24 /* Bits representing ShiftFlags, See Int16/Function 2 or Mem[0x417] to get this info */
  25
  26 #define INSERT_ON     (1<<7)
  27 #define CAPSLOCK_ON   (1<<6)
  28 #define NUMLOCK_ON    (1<<5)
  29 #define SCRLLOCK_ON   (1<<4)
  30 #define ALT_PRESSED   (1<<3)
  31 #define CTRL_PRESSED  (1<<2)
  32 // actually 1<<1 is Left Shift, 1<<0 is right shift
  33 #define SHIFT_PRESSED (1<<1 | 1 <<0)
  34
  35 /* BIOS Assisted output routines */
  36
  37 void getpos(char *row, char *col, char page);
  38
  39 char inputc(char *scancode);    // Return ASCII char by val, and scancode by reference
  40
  41 void setcursorshape(char start, char end);      // Set cursor shape
  42 void getcursorshape(char *start, char *end);    // Get shape for current page
  43
  44 // Get char displayed at current position in specified page
  45 unsigned char getcharat(char page);
  46
  47 static inline unsigned char readbiosb(unsigned int ofs)
  48 {
  49     return *((unsigned char *)MK_PTR(0, ofs));
  50 }
  51
  52 static inline char getshiftflags(void)
  53 {
  54     return readbiosb(0x417);
  55 }
  56
  57 void scrollupwindow(char top, char left, char bot, char right, char attr, char numlines);       //Scroll up given window
  58
  59 void setvideomode(char mode);   // Set the video mode.
  60
  61 static inline char getvideomode(void)   // Get the current video mode
  62 {
  63     return readbiosb(0x449);
  64 }
  65
  66 #endif