/************************************************************************/
/*									*/
/* AMITSRS.C	List TSRs using the alternate multiplex interrupt	*/
/* Public Domain 1992 Ralf Brown					*/
/* Version 0.80 							*/
/* Last Edit: 4/19/92							*/
/*                                                                      */
/* Must be compiled in a large data model (compact recommended)		*/
/* ex.  TCC -mc AMITSRS							*/
/*									*/
/************************************************************************/

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

int main(int argc,char **argv)
{
   int mpx ;
   int did_banner = 0, verbose = 0 ;
   union REGS regs ;
   char far *sig ;
   
   /* prevent 'unused parameters' warnings */
   (void)argv ;
   /**/
   /* if any commandline arguments, turn on verbose mode */
   /**/
   if (argc > 1)
      verbose = 1 ;
   /**/
   /* loop through all 256 multiplex numbers, listing each signature we find */
   /**/
   for (mpx = 0 ; mpx <= 255 ; mpx++)
      {
      regs.h.ah = mpx ;
      regs.h.al = 0 ;  /* installation check */
      int86(0x2D,&regs,&regs) ;
      if (regs.h.al == 0xFF) /* installed? */
	 {
	 if (!did_banner)
	    {
	    printf("Manufact  Product\t\tDescription\n") ;
	    printf("-------- -------- ----------------------------------------------\n") ;
	    did_banner = 1 ;
	    }
	 sig = MK_FP(regs.x.dx,regs.x.di) ;
	 printf("%8.8s %8.8s %.61s\n",sig,sig+8,sig+16) ;
	 /**/
	 /* if we were asked for a verbose display, also display TSR version */
	 /* and private API entry point (if present) on a second line	     */
	 /**/
	 if (verbose)
	    {
	    printf("%18sversion %d.%02d","",regs.h.ch,regs.h.cl) ;
	    regs.h.ah = mpx ;
	    regs.h.al = 1 ;  /* get private entry point */
	    int86(0x2D,&regs,&regs) ;
	    if (regs.h.al == 0xFF)
	       printf("   entry point %04.4X:%04.4X ",regs.x.dx,regs.x.bx) ;
	    else
	       printf("   no private entry point") ;
	    printf("\n") ;
	    }
	 }
      }
   if (!did_banner)
      printf("No TSRs are using the alternate multiplex interrupt\n") ;
   return 0 ;
}