Parameter

filespec

   Specifies the image file to be patched or a command procedure
   that contains both the name of the image file to be patched and
   PATCH commands.

   If the file specification denotes an image file, the file
   specification must contain the file name. If you omit the
   remaining fields (device, directory, file type, and version
   number), PATCH uses your default device and directory, assumes
   a file type of EXE, and uses the highest version of the image
   file.

   If the file specification denotes a command procedure, the
   filespec parameter must be preceded by an at sign (@). Only
   the file name is required. If you omit the remaining fields
   (device, directory, file type, and version number), PATCH uses
   your default device and directory, assumes a file type of COM,
   and locates the highest version of the command procedure.

   The asterisk (*) and the percent sign (%) wildcard characters are
   not allowed in the file specification.