Routines for work with directories and files:

DISK.8		- change disk directory (root, upper)
GETFILES.8	- read files from disk
PRNLIST.8	- print the files (or any data)
SORTLIST.8	- sort the files (or any data)


README.TXT	- this text
LISTDIR.8	- demo program source
LISTDIR.COM	- demo program


Description of the routines:

;*********
;GET_FILES
;loads file_list table with info about the files in directory
;the structure of the info is following:
;	xxxxxxxx.xxxZ	13 bytes file name ASCIIZ string
;	00		1  byte reserved
;	00		1  byte reserved
;	?		1  byte file attribs 		
;	xxxx		4  bytes file size
; one file has 20 bytes record
; the rutine works within one segment CS=ES=DS 
; (I hope someone will adapt this routine for all segments range)
;
;INPUT:		CL	- file attributes
;		CH	- maximum of files to load into the table (1-254)
;		DX	- pointer to file spec. ASCIIZ
;		SI	- pointer to DTA (usually 080 hexa)
;		DI	- pointer to file_list table
;	
;OUTPUT:	CY	- set - error	
;			  AX  - error code
;		CY	- cleared - OK
;			  AX  - number of files in the file_list table
;
;DESTROYS:	flags
;		AX
;----------------------------------




;*********************************
;PRINT_LIST
;prints records in the list onto the standard output device (strdout)
;every record must be zero terminated
;
;INPUT:		SI	pointer to the list
;		DL	total od records
;		CX	record size 
;OUTPUT		registers: none
;		data on strdout
;DESTROYS	flags
;---------------------------------




;*********************************
;SORT_LIST
;sorts records in a list - designed for file_list with info about
;directory files but can be used universally
;
;INPUT:		SI	pointer to list of records
;		CX	size of record in bytes
;		DL	total of records in list
;		AL	- 0 sort all records
;			- 1 sort directory records (#-note) first
;OUTPUT:	none
;DESTOYS:	flags	
;
; # note:	directory record is bit 4 (starting from 0) in
;		file attributes that are save on offset 0F in a record  
;		see GET_FILES to learn more
;------------------------------------



;***********************************
;SET_ROOT
;will set root directory on current drive
;the same as DOS "cd \" command.
;INPUT: 	none
;OUTPUT:	CY	- cleared - OK
;			- set - error
;			  than  AX - DOS error number
;DESTROYS:	flags
;		AX
;-----------------------------------




;***************************************
;CD_UP
;will set the up-dir (if possible)
;similar to DOS "cd .." command
;
;INPUT: 	none
;OUTPUT:	CY	- cleared - OK
;			- set - error
;			  than  AX - DOS error number
;DESTROYS:	flags
;		AX
;-----------------------------------