home *** CD-ROM | disk | FTP | other *** search
- /* cxb.c--checks for xbios modules.
- Copyright 7/85 N.T.Carnevale.
- Permission granted for nonprofit use only.
- See my article in the July/August 1986 issue of
- Micro/Systems Journal pp.72-85.
- */
-
- #include "printf.h"
-
- /* vital definitions */
- #include "xb.h"
-
- #define VERSION "v.1.2 7/16/85\n\n"
-
- char *idstring=SIG;
- boolean found=FALSE;
-
-
- main()
- {
- struct xbhdr *xbintro;
- struct cpmhdr *cpmintro;
- char *vers,*descr;
- boolean xbexists;
-
- printf(VERSION);
- xbexists=TRUE; /* assume there is one */
- /* find start of suspected module */
- cpmintro=0;
- xbintro=(struct xbhdr *)cpmintro->bdosloc;
- while (xbexists) {
- /* now see if the signature is where it should be */
- if (compare(idstring,xbintro->signature,SIGLNTH)) {
- found=TRUE;
- printf("xbios present at %x\n",(int)xbintro);
- vers = &xbintro->vstart;
- descr = &vers[strlen(vers)+1];
- printf("%s\n%s\n\n",vers,descr);
- /* try for the next one */
- xbintro=(struct xbhdr *)xbintro->oldbdos;
- }
- else xbexists=FALSE;
- }
- if (!found) printf("no xbios installed\n");
- }
-
-
- boolean compare(s1,s2,num)
- /* compare num bytes pointed to by s1 and s2
- return TRUE if identical, otherwise return FALSE */
- char s1[],s2[];
- int num;
- {
- int i;
- boolean equal;
-
- for (i=0,equal=TRUE; (i<num) && equal; i++)
- equal = s1[i]==s2[i];
- return (equal);
- }