DU2 VERSION 1.7 BRIEF 01/25/84

     The  DU2  program is designed to provide the user	with  the
ability  to  manipulate information on the disk as easily as  the
DDT and SID utilities allow the user to manipulate information in
memory.   DU2 is a disk utility for CP/M 2.2, CP/M Plus, CP/M-86,
and  soon for CCP/M-86 (it should also work with  MP/M-80  II,	I
haven't  tried it yet).   It can be used to recover erased files,
correct bad directories, etc.

     This  disk utility contains many handy features not found in
any other disk utility.   These include the following:

	  o Macro  commands
	  o Working properly 128 byte sectors on track 0 when all
	    other sectors are greater than 128 bytes
	  o Working  with drives greater than 8 megabytes (up  to
	    CP/Ms limit of 512 Meg)
	  o Save  groups or sectors into a Queue that can be read
	    or written to disk
	  o Makes  certain  that Bdos and Bios never  access  the
	    wrong drive
	  o Will  display  all FCBs in the directory for a  given
	    file
	  o Dynamically  allocates  the physical  sector  buffer,
	    which allows effecient use of memory


     The  following  is  a  list of all  commands  with  a  brief
explaniation of each.  For a complete explanation of commands see
DU2.DOC   or  DU2.HLP  (These  are  contained  in   DU2-DOC.LBR).
Operands  in  brackets	[...] are optional.   You  can	cancel	a
function  with C or Ctrl-C,  or suspend output with S or  Ctrl-S.
You should separate commands on the same line with a comma ",".

@	Repeat Previous Non-@ Command Line
+[nn]	Step In [nn (decimal)] Sectors
-[nn]	Step Out Sectors
	Note:  + or - commands force a read.
<	Save Current Sector into Temp
>	Restore Sector from Temp
#	Print Disk Parameters for Current Drive
=xxx	Search for ASCII xxx from Current Sector
	Note:	Upper/lower case matters.  Use <xx> for hex:
		To find "IN 0" use: =<db><0>     or
		"(tab)H,0(CR)(LF)" use: =<9>H,0<D><A>
*[nn]	Repeat [nn (decimal) times]
!	Pause for user input

A[ff,tt] ASCII Dump
C	 Change:
		CHaddr byte byte... (hex)
		or CAaddr data...  (Ascii)
		<xx> Allowed for imbedded hex.
		or CHfrom-thru byte  e.g. ch0-7f e5
		or CAfrom-thru data (Ascii)
D[ff,tt] Dump (Hex and ASCII)
Ffn.ft	 Find File
Gnn	 CP/M Allocation Group nn (hex)










H[ff,tt] Hex Dump
K	 Kill console output
L[d]	 Log in Current Drive or Drive d
M[nn]	 Map [from group nn (hex)]
N	 Load New Disk
P	 Toggle Printer Switch
Snn	 Read Sector nn (decimal)
Tnn	 Set Track nn (decimal)
Unn	 Set User nn (decimal) for Find command
V[nn]	 View [nn (decimal)] ASCII Sectors
R	Read Current Sector
W	Write Current Sector
X	Exit Program
Z[nn]	Sleep [nn (decimal) seconds]

--- QUEUE OPERATIONS:
Q	Queue Status
QZ	Zero (Empty) Queue
QSd:fn.ft  Save Queue as a File on Disk
QRd:fn.ft  Read Queue from a File on Disk
<S	Save Sector into Queue
>S	Restore Sector from Queue
<G[n]	Save Group into Queue
>G[n]	Restore Group from Queue

--- MACRO OPERATIONS:
:ntext	Define 'text' to be Macro n
n	Perform Macro n, 0<=n<=9
:Pn	Print Macro n, 0<=n<=9
:Px	Print All Macros if x=A or Print Prev Line if x=@

"nn" usage varies with command as follows:
	+, -, *, T, S, U, V, Z	nn in Decimal
				(use #nn for Hex)
	G, M			nn in Hexadecimal
				(use #nn for Decimal)
"ff" and "tt" are in Hexadecimal 
(use #ff or #tt for Decimal)

     This  version  of DU2 came from DU2 v1.1 written by  Richard 
Conn  for  his  ZCPR2 system.   I have  extensively  changed  and 
improved it.   If you want or have implemented any useful changes 
then  please write at the below address.  Or leave a  message  or 
the  changes  on  the Pasadena RBBS (operated By  Rich  Berg)  at 
213/577-9947 (as of January 7,1984 it will be 818/577-9947).

Craig D. Miller
73 Esperanza Apt H
Sierra Madre, Ca 91024