PCSWP
 Eugene Nolan
 2/10/89
 c/o DHN* RCPM 215-623-4040

 This utility allows you access to IBM PC 320/360k floppies
 if:
  1 - Your systems has a means of accessing DS/DD 5.25
      with 512 byte sectors and 8 or 9 physical sectors/track.
      This means that your system must support 4k or 4.5k bytes
      per track on your floppy. It must also alternate heads
      when it overflows the current track.

 It:
  1 - Allows you to spec the drive the DOS disk is on
  2 - Get a directory listing of the DOS disk
  3 - Copy a single file at a time to the DOS disk (no wildcards) from
       a specified CPM drive/user
  4 - Sweep the DOS disk
      A - Foreward or backwards
      B - View a file ( if file is not ASCII, sorry )
      C - Delete a DOS file
      D - Tag a DOS file for later mass copy
      E - Untag a previously tagged file
      F - Copy all tagged files to a designated CPM drive/user
  5 - During file copies from/to the DOS disk, you will be asked
       whether to proceed on not if the destination file exists

 Limitations:
  1 -	Only  320k and 360k format supported.
  2 -	File names with 05 in dos directory as first character
	of name may display funny, as no conversion to the true
	E5h will be made.
  3 -   For file copys from/to the DOS disk, no data verification is done
  4 -   No autologin of DOS disk, if you change the disk, tell the
        program by re-specifying the drive the DOS disk is on
  5 -   Checks are made to verify the DOS disk is a DOS disk of the supported
        formats, but given the right circumstances, it is possible to trick
        the program (possible but unlikely).

 
 Many commercial systems have a utility that will allow you to
 define this format. For those of you who wish to roll your own
 DPB, the values are:

DPBF:	;DISK PARAMETER BLOCK for IBM 360k
	DW	36		;SECTORS PER TRACK ( 32 if 320k disk)
	DB	3		;BLOCK SHIFT FACTOR
	DB	7		;BLOCK MASK
	DB	0		;EXTENT MASK
	DW	359		;DISK SIZE-1 (319 if 320k disk)
	DW	63		;DIRECTORY MAX (Not applicable)
	DB	128+64		;ALLOC 0	ditto
	DB	0		;ALLOC 1	ditto
	DW	8		;CKS		ditto
	DW	0		;TRACK OFFSET	ditto
 

 General Notes:

  This program is written in Small C 2.11. In doing so it makes use
  of some of Small C's internal data bases (namely _fcbptr) and it's
  method of allocating storage for global variables. In doing so, it
  will probably not compile correctly with ANY commercial compiler.
 
  Also note again, if you change the 'DOS' disk, TELL THE PROGRAM by
  using the SELECT DOS DISK function from the main menu.

  And please do not get in the habit of Control-C'ing out of it,
  Small C lets you do it, but there may be side effects, use the
  exit from the main menu. ( Only applies if you have been able to
  succesfully select a DOS disk).

  The program in it's current version is somewhat slow in it's write's
  to the DOS floppy. This is because, for the time being, the BIOS
  calls to 'write sector' are initiated with a 'write to directory' code,
  which flushes each 128 byte CPM sector individually, regardless of
  any allocation management code in the BIOS.