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- /* +++Date last modified: 05-Jul-1997 */
-
- /*
- ** Public domain by Paul Schlyter, 27-Apr-1994
- **
- ** modified for SNIPPETS by Bob Stout
- **
- ** Pass: 0 for drive A:, 1 for drive B:, 2 for drive C:, etc.
- **
- ** Returns: True_ if the drive is a CD-ROM
- ** False_ if the drive is not a CD-ROM
- ** Error_ if MSCDEX not installed
- */
-
- #include "dosfiles.h"
-
- Boolean_T isCDROMdrive(int drive)
- {
- union REGS r;
-
- r.x.ax = 0x1500; /* First test for presence of MSCDEX */
- r.x.bx = 0;
- int86( 0x2F, &r, &r );
- if ( r.x.bx == 0 )
- return Error_; /* MSCDEX not there */
- r.x.ax = 0x150B; /* MSCDEX driver check API */
- r.x.cx = drive - 'A';
- int86( 0x2F, &r, &r );
- return r.x.ax != 0; /* Drive is CDROM if AX nonzero */
- }
-