🚀 go-pugleaf

In article <28501@linus.UUCP>, jcmorris@mitre-bedford.ARPA (Joseph C. Morris) writes:
> In article <767@ms3.UUCP> msicv01@ms3.UUCP (Jay G. Heiser) writes:
> >                       ...I need a way to test before using any ESC seq-
> >uences whether or not the [ANSI.SYS] driver has been set.  How can I do that?
> 
Here's a fragment of C code which works for me.  It compiles under
MS C 5.0:

union REGS inregs,outregs;

printf("\n\033[2J"); /* prints a newline and then tries to clear the screen */
inregs.h.ah = 3;
inregs.h.bh = 0;
int86(0x10,&inregs,&outregs);
if (outregs.h.dh != 0) /* if cursor is not at top of screen then...*/
	{
	printf("ANSI.SYS is not loaded on this system.  In order for the\n");
   printf("program to work properly you must have ANSI.SYS on the system, and\n");
   printf("you must have a line in your CONFIG.SYS file which reads:\n");
   printf("      device=ansi.sys                                   \n");
   printf("\nAfter inserting such a line into your CONFIG.SYS file, please\n");
   printf("reset your system and rerun  .......\n");
   printf("\n***********Hit any key to exit******************");
   ch = getch();
	exit(1);
   }