HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                     INT 21,29 - Parse a Filename for FCB

       AH = 29h
       AL = bit pattern to control parsing (see bit meanings below)
       DS:SI = pointer to a filespec to parse
       ES:DI = pointer to a buffer for unopened FCB


       Bit patterns for parsing control found in AL:

       │7│6│5│4│3│2│1│0│  AL
        │ │ │ │ │ │ │ └──── 1 = ignore leading separators
        │ │ │ │ │ │ │       0 = don't ignore leading separators
        │ │ │ │ │ │ └───── 1 = modify drive ID if specified
        │ │ │ │ │ │        0 = modify drive ID regardless
        │ │ │ │ │ └────── 1 = modify filename if specified
        │ │ │ │ │         0 = modify filename regardless
        │ │ │ │ └─────── 1 = modify extension if specified
        │ │ │ │          0 = modify extension regardless
        └─┴─┴─┴──────── unused

       on return:
       AL = 00 if no wildcard characters present
          = 01 if wildcards present in string
          = FF if drive specifier is invalid
       DS:SI = pointer to the first character after parsed filename
       ES:DI = pointer to the updated unopened FCB


       - retrieves filename from the command line string and places
         the filename components into an unopened FCB for later use
       - if no filename is found a pointer is returned in ES:DI that
         has a blank at ES:DI+1
       - this function can be used to detect the existence of logical DOS
         drives by creating a dummy filespec with a drive letter and colon
         prepended.  If the drive is invalid, this function will return FF
         in AL

Esc or Alt-X to exit int 21,29 Home/PgUp/PgDn/End ←↑↓→