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/* -*- c -*- ------------------------------------------------------------- *
*
* Copyright 2004-2005 Murali Krishnan Ganapathy - All Rights Reserved
*
* 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, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
#include <string.h>
#include <com32.h>
#include "com32io.h"
#include "syslnx.h"
com32sys_t inreg,outreg; // Global register sets for use
/* Print character and attribute at cursor */
void cprint(char chr,char attr,unsigned int times,char disppage)
{
REG_AH(inreg) = 0x09;
REG_AL(inreg) = chr;
REG_BH(inreg) = disppage;
REG_BL(inreg) = attr;
REG_CX(inreg) = times;
__intcall(0x10,&inreg,&outreg);
}
void setdisppage(char num) // Set the display page to specified number
{
REG_AH(inreg) = 0x05;
REG_AL(inreg) = num;
__intcall(0x10,&inreg,&outreg);
}
char getdisppage() // Get current display page
{
REG_AH(inreg) = 0x0f;
__intcall(0x10,&inreg,&outreg);
return REG_BH(outreg);
}
void getpos(char * row, char * col, char page)
{
REG_AH(inreg) = 0x03;
REG_BH(inreg) = page;
__intcall(0x10,&inreg,&outreg);
*row = REG_DH(outreg);
*col = REG_DL(outreg);
}
void gotoxy(char row,char col, char page)
{
REG_AH(inreg) = 0x02;
REG_BH(inreg) = page;
REG_DX(inreg) = (row << 8)+col;
__intcall(0x10,&inreg,&outreg);
}
unsigned char sleep(unsigned int msec)
{
unsigned long micro = 1000*msec;
REG_AH(inreg) = 0x86;
REG_CX(inreg) = (micro >> 16);
REG_DX(inreg) = (micro & 0xFFFF);
__intcall(0x15,&inreg,&outreg);
return REG_AH(outreg);
}
void beep()
{
REG_AH(inreg) = 0x0E;
REG_AL(inreg) = 0x07;
REG_BH(inreg) = 0;
__intcall(0x10,&inreg,&outreg);
}
void scrollupwindow(char top, char left, char bot, char right, char attr,char numlines)
{
REG_AH(inreg) = 0x06;
REG_AL(inreg) = numlines;
REG_BH(inreg) = attr; // Attribute to write blanks lines
REG_DX(inreg) = (bot << 8) + right; // BOT RIGHT corner of window
REG_CX(inreg) = (top << 8) + left; // TOP LEFT of window
__intcall(0x10,&inreg,&outreg);
}
char inputc(char * scancode)
{
syslinux_idle(); /* So syslinux can perform periodic activity */
REG_AH(inreg) = 0x10;
__intcall(0x16,&inreg,&outreg);
if (scancode) *scancode = REG_AH(outreg);
return REG_AL(outreg);
}
void getcursorshape(char *start, char *end)
{
char page = getdisppage();
REG_AH(inreg) = 0x03;
REG_BH(inreg) = page;
__intcall(0x10,&inreg,&outreg);
*start = REG_CH(outreg);
*end = REG_CL(outreg);
}
void setcursorshape(char start, char end)
{
REG_AH(inreg) = 0x01;
REG_CH(inreg) = start;
REG_CL(inreg) = end;
__intcall(0x10,&inreg,&outreg);
}
char getchar(void)
{
REG_AH(inreg) = 0x08;
__intcall(0x21,&inreg,&outreg);
return REG_AL(outreg);
}
void setvideomode(char mode)
{
REG_AH(inreg) = 0x00;
REG_AL(inreg) = mode;
__intcall(0x10,&inreg,&outreg);
}
unsigned char checkkbdbuf()
{
REG_AH(inreg) = 0x11;
__intcall(0x16,&inreg,&outreg);
return !(outreg.eflags.l & EFLAGS_ZF);
}
// Get char displayed at current position
unsigned char getcharat(char page)
{
REG_AH(inreg) = 0x08;
REG_BH(inreg) = page;
__intcall(0x16,&inreg,&outreg);
return REG_AL(outreg);
}
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