HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                            INT 21,E - Select Disk

       AH = 0E
       DL = zero based, drive number (0-25, A: - Z:)

       on return:
       AL = one based, total number of logical drives including
            hardfiles (1-26)

       - for DOS 3.x+, this function returns the number of logical
         drives or the value of LASTDRIVE (default of 5) in the
         CONFIG.SYS file

Esc or Alt-X to exit int 21,e Home/PgUp/PgDn/End ←↑↓→
Converted to HTML in 2006 by Timo Bingmann