MANUAL FOR DRDIR (6502 ROM image & 6502 RAM patch)

This file describes the software DRDIR which reinterprets the depreciated 
command "*DRIVE <drive#>" and reissues it as a *DIR :<drive#> instead.For use 
on 8 bit BBC series of microcomputer,this finds applications where software 
has been written with DFS in mind but which have been converted to ADFS 
disks - the command *DRIVE was removed from ADFS on the Master 128 (MOS 3.20) 
resulting in some of these programs not working.
The manual is (C)1999 SPROW and software is (C)1997 SPROW

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ROM IMAGE
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INSTRUCTIONS-
At any command line prompt,eg.the BASIC command prompt '>' type
ON A MASTER: *SRLOAD DRDIR 8000 <socket#>
             *INSERT <socket#>
             where <socket#> may be 7,6,5,4
ON A MACHINE WITH SWRAM: *LOAD DRDIR 8000
and press CTRL-BREAK to initialise.

The image will then be installed into the chosen socket where it will convert
all future *DRIVE commands.Pressing BREAK has no effect on the image - it 
will carry on working unlike a RAM based patch.

In addition,some details are available by typing *HELP DRIVE

The minimum acceptable abbreviation is *DR.

EXIT MESSAGES-
"Bad Drive" - the drive number was omitted

KNOWN PROBLEMS/FUTURE ENHANCEMENTS-
No known problems

HISTORY-
V1.00 First release version,to the Solinet BBC disk user group.
V1.10 Improved sideways image version by using ROM service call #4 method of 
      trapping unknown commands rather than using extended vectors pointing 
      into the ROM.These are now freed up for use by other applications 
      software.
V1.15 Now the ROM image wont bother reissing the *DIR command unless NetFS 
      (or greater) is the current FS.

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RAM PATCH
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INSTRUCTIONS-
At any command line prompt,eg.the BASIC command prompt '>' type *DRDIR

The program will then install itself into page &C00 (the CHR$ defn buffer on 
the BBC and Electron,or Econet workspace on the Master) where it will convert
all future *DRIVE commands.Pressing BREAK will stop the program intercepting 
star commands.

The minimum acceptable abbreviation is *DR.

EXIT MESSAGES-
"Bad Drive" - the drive number was omitted

KNOWN PROBLEMS/FUTURE ENHANCEMENTS-
No known problems
Repointing of the 'reset' vector,to allow the pressing of BREAK,as for example
may be performed when pressing BREAK-SHIFT to boot a disk.

HISTORY-
V1.00 First release version,to the Solinet BBC disk user group
V1.15 Now the RAM patch wont bother reissing the *DIR command unless NetFS 
      (or greater) is the current FS.