com32/cmenu/libmenu/com32io.c

   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 #include <string.h>
  14 #include <com32.h>
  15 #include "com32io.h"
  16 #include "tui.h"
  17 #include "syslnx.h"
  18
  19 com32sys_t inreg, outreg;       // Global register sets for use
  20
  21 void getpos(char *row, char *col, char page)
  22 {
  23     REG_AH(inreg) = 0x03;
  24     REG_BH(inreg) = page;
  25     __intcall(0x10, &inreg, &outreg);
  26     *row = REG_DH(outreg);
  27     *col = REG_DL(outreg);
  28 }
  29
  30 unsigned char sleep(unsigned int msec)
  31 {
  32     unsigned long micro = 1000 * msec;
  33
  34     REG_AH(inreg) = 0x86;
  35     REG_CX(inreg) = (micro >> 16);
  36     REG_DX(inreg) = (micro & 0xFFFF);
  37     __intcall(0x15, &inreg, &outreg);
  38     return REG_AH(outreg);
  39 }
  40
  41 char inputc(char *scancode)
  42 {
  43     syslinux_idle();            /* So syslinux can perform periodic activity */
  44     REG_AH(inreg) = 0x10;
  45     __intcall(0x16, &inreg, &outreg);
  46     if (scancode)
  47         *scancode = REG_AH(outreg);
  48     return REG_AL(outreg);
  49 }
  50
  51 void getcursorshape(char *start, char *end)
  52 {
  53     char page = 0; // XXX TODO
  54     REG_AH(inreg) = 0x03;
  55     REG_BH(inreg) = page;
  56     __intcall(0x10, &inreg, &outreg);
  57     *start = REG_CH(outreg);
  58     *end = REG_CL(outreg);
  59 }
  60
  61 void setcursorshape(char start, char end)
  62 {
  63     REG_AH(inreg) = 0x01;
  64     REG_CH(inreg) = start;
  65     REG_CL(inreg) = end;
  66     __intcall(0x10, &inreg, &outreg);
  67 }
  68
  69 void setvideomode(char mode)
  70 {
  71     REG_AH(inreg) = 0x00;
  72     REG_AL(inreg) = mode;
  73     __intcall(0x10, &inreg, &outreg);
  74 }
  75
  76 // Get char displayed at current position
  77 unsigned char getcharat(char page)
  78 {
  79     REG_AH(inreg) = 0x08;
  80     REG_BH(inreg) = page;
  81     __intcall(0x16, &inreg, &outreg);
  82     return REG_AL(outreg);
  83 }