Category : C Source Code
Archive   : SNIP1292.ZIP
Filename : CURSOR.C

/*****************************************************************/
/** CURSOR() **/
/** ARGUMENTS: A char variable identifiny what to do with **/
/** the cursor. **/
/** RETURN: none **/
/** **/
/** DESCRIPTION: This function receives a character which **/
/** tells it to do one of several things. **/
/** Turn the cursor on or off, or save the **/
/** cursor positon, or restore the position. **/
/** **/
/** BY Bill Wilkie, 1988 **/
/*****************************************************************/

int position; /* global to hold cursor postion */

void cursor(char tmp)
{
union REGS inregs,outregs; /* cpu registers */

switch(tmp)
{
case 'h' : /* CURSOR OFF */
inregs.h.ah = 1; /* set cursor size */
inregs.h.ch = 0x20; /* set bit turns cursor off */
int86(0x10,&inregs,&outregs);
break;

case 's' : /* SAVE CURSOR POSITION */
inregs.h.ah = 3; /* read cursor positon and size */
inregs.h.bh = 0; /* from page zero */
int86(0x10,&inregs,&outregs);
position = outregs.x.dx; /* store positon */
break;

case 'r' : /* RESTORE CURSOR POSITON */
inregs.h.ah = 2; /* set cursor positon */
inregs.h.bh = 0; /* on page zero */
inregs.x.dx = position; /* at this old position */
int86(0x10,&inregs,&outregs);
break;

case 'o' : /* CURSOR ON */
inregs.h.ah = 1; /* set cursor size */
inregs.h.ch = 6; /* cursor start line */
inregs.h.cl = 7; /* cursor end line */
int86(0x10,&inregs,&outregs);
break;
}
}