INT 2fH 1500H: Is MSCDEX Installed?/Count Drive Letters
Compatibility: 6.0+
Expects: AX 1500H
BX 0000H
──────────────────────────────────────────────────────────────────
Returns: BX number of CD-ROM drive letters (0=not installed)
──────────────────────────────────────────────────────────────────
Info: Checks to see if MSCDEX.EXE (the Microsoft CD-ROM support driver)
has been installed and returns the number of drive letters in use
by CD-ROMs.
Use INT 2fH 150dH (query CD-ROM drive letters) to learn which
drive letters that are in use.
See Also: INT 2fH: Multiplex Interrupt
DOS Functions
-♦-