Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!eos!labrea!decwrl!hplabs!hp-pcd!hpcvlx!eric
From: eric@hpcvlx.HP.COM (Eric Gullerud)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Stop cursor blinking in MS-DOS
Message-ID: <1180017@hpcvlx.HP.COM>
Date: 4 May 88 21:15:26 GMT
References: <22066@teknowledge-vaxc.ARPA>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 63


Here is a program that will turn the cursor on or off.  It uses
the BIOS Video call (INT 10H).  This program is actually a modified
version of an example program in the MSC 5.1 Reference Manual for the
"int86" library routine (on page 366).  The actual code to alter
the cursor is only 4 lines.

Hope this helps...
				Eric Gullerud	eric@hpcvlx.HP.COM

------------------------------ cut here ---------------------------------

/*
 *  blinker.c  --  turn the cursor on or off
 */

#define VIDEO_IO  0x10
#define SET_CRSR  1

#include <dos.h>
#include <stdio.h>

union REGS regs;

/* top and bottom values for cursors on various & sundry displays: */
#define MONO_TOP	12
#define MONO_BOT	13
#define COLOR_TOP	6
#define COLOR_BOT	7
#define EGA43_TOP	4
#define EGA43_BOT	5

main(int argc, char **argv) {
	int  top, bottom, mode;

	/* check for correct command usage */
	if (argc != 2) {
		printf("Usage: %s <on|off|slow|fast>\n",
			argv[0]);
		exit(1);
	}

	/* set top and bottom for cursor;  could be on command line too */
	top	= COLOR_TOP;	/* I have an EGA card; this is the mode */
	bottom	= COLOR_BOT;	/* ... that it boots up in */

	/* get cursor mode from command argument */
	if (!strcmp(argv[1], "on")) mode = 0;	/* default for EGA */
	else if (!strcmp(argv[1], "off")) mode = 1;
	else if (!strcmp(argv[1], "slow")) mode = 2;
	else if (!strcmp(argv[1], "fast")) mode = 3;
	else {
		printf("%s: illegal cursor mode (%s)\n", argv[0], argv[1]);
		exit(1);
	}

	/* Set up for cursor change call */
	regs.h.ah = SET_CRSR;
	regs.h.ch = top + (mode << 4);
	regs.h.cl = bottom;

	/* Execute BIOS interrupt call */
	int86(VIDEO_IO, &regs, &regs);
}