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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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vol_300
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328_01
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wcursor.c
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C/C++ Source or Header
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1991-03-17
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1KB
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86 lines
/*! wcursor
*
*
* turn cursor on or off
*
* use : 1 = ON turns cursor on
* 0 = OFF turns cursor off
*
*/
#include "wscreen.h"
#include "wsys.h"
#include <dos.h>
void wcursor(int want_cursor)
{
int row, col, page;
PSEUDOREGS;
#ifndef TEXTONLY
if (wmode == 'G')
{
return;
}
#endif /* TEXTONLY */
if (want_cursor == ON)
{
w0-> winflag |= WFL_CURSOR;
/* move the physical cursor to the logical location
* NOTE that using TurboC's pseudoregs
* means all far * calculations have to
* be done before loading regs.
*/
page = w0-> winpage;
col = w0-> winleft +w0->winx;
row = w0-> wintop +w0->winy;
_DH = row;
_DL = col;
_BH = page;
_AH = 2; /* function to set cursor position */
INTERRUPT(0x10);
/*load new cursor size
*/
_CX = wcurscanln;
_AH = 1; /* indicates cursor size request */
INTERRUPT (0x10);
}
else /* want_cursor OFF */
{
w0-> winflag &= (0xff - WFL_CURSOR);
_CH = 0x2E; /* stop cursor */
_CL = 0x20;
_AH = 1;
INTERRUPT (0x10);
}
return;
} /*end wcursor routine */